<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva, formerly WebFilings-->
<!-- -->
<linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <roleRef roleURI="http://www.fortinet.com/role/AccumulatedOtherComprehensiveLossIncome" xlink:href="ftnt-20141231.xsd#AccumulatedOtherComprehensiveLossIncome" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/AccumulatedOtherComprehensiveLossIncomeChangesInAccumulatedBalancesOfOtherComprehensiveIncomedetails" xlink:href="ftnt-20141231.xsd#AccumulatedOtherComprehensiveLossIncomeChangesInAccumulatedBalancesOfOtherComprehensiveIncomedetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/AccumulatedOtherComprehensiveLossIncomeReclassificationOutOfAccumulatedOtherComprehensiveIncomeDetails" xlink:href="ftnt-20141231.xsd#AccumulatedOtherComprehensiveLossIncomeReclassificationOutOfAccumulatedOtherComprehensiveIncomeDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/AccumulatedOtherComprehensiveLossIncomeTables" xlink:href="ftnt-20141231.xsd#AccumulatedOtherComprehensiveLossIncomeTables" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/BusinessCombinations" xlink:href="ftnt-20141231.xsd#BusinessCombinations" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/BusinessCombinations2013AcquisitionsDetails" xlink:href="ftnt-20141231.xsd#BusinessCombinations2013AcquisitionsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/BusinessCombinationsTables" xlink:href="ftnt-20141231.xsd#BusinessCombinationsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/CommitmentsAndContingencies" xlink:href="ftnt-20141231.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/CommitmentsAndContingenciesDetails" xlink:href="ftnt-20141231.xsd#CommitmentsAndContingenciesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/CommitmentsAndContingenciesMinimumOperatingLeasePaymentsDetails" xlink:href="ftnt-20141231.xsd#CommitmentsAndContingenciesMinimumOperatingLeasePaymentsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/CommitmentsAndContingenciesTables" xlink:href="ftnt-20141231.xsd#CommitmentsAndContingenciesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/ConsolidatedBalanceSheets" xlink:href="ftnt-20141231.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="ftnt-20141231.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="ftnt-20141231.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:href="ftnt-20141231.xsd#ConsolidatedStatementsOfComprehensiveIncome" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/ConsolidatedStatementsOfOperations" xlink:href="ftnt-20141231.xsd#ConsolidatedStatementsOfOperations" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:href="ftnt-20141231.xsd#ConsolidatedStatementsOfStockholdersEquity" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/DeferredRevenue" xlink:href="ftnt-20141231.xsd#DeferredRevenue" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/DeferredRevenueDetails" xlink:href="ftnt-20141231.xsd#DeferredRevenueDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/DeferredRevenueTables" xlink:href="ftnt-20141231.xsd#DeferredRevenueTables" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/DefinedContributionPlans" xlink:href="ftnt-20141231.xsd#DefinedContributionPlans" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/DefinedContributionPlansDetails" xlink:href="ftnt-20141231.xsd#DefinedContributionPlansDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/DocumentAndEntityInformation" xlink:href="ftnt-20141231.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/FinancialInstrumentsAndFairValue" xlink:href="ftnt-20141231.xsd#FinancialInstrumentsAndFairValue" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/FinancialInstrumentsAndFairValueAdditionalInformationDetails" xlink:href="ftnt-20141231.xsd#FinancialInstrumentsAndFairValueAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/FinancialInstrumentsAndFairValueChangeToContingentConsiderationLiabilityDetails" xlink:href="ftnt-20141231.xsd#FinancialInstrumentsAndFairValueChangeToContingentConsiderationLiabilityDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/FinancialInstrumentsAndFairValueFairValueMeasurementsDetails" xlink:href="ftnt-20141231.xsd#FinancialInstrumentsAndFairValueFairValueMeasurementsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/FinancialInstrumentsAndFairValueInvestmentsDetails" xlink:href="ftnt-20141231.xsd#FinancialInstrumentsAndFairValueInvestmentsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/FinancialInstrumentsAndFairValueTables" xlink:href="ftnt-20141231.xsd#FinancialInstrumentsAndFairValueTables" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/GoodwillAndOtherIntangibleAssetsNet" xlink:href="ftnt-20141231.xsd#GoodwillAndOtherIntangibleAssetsNet" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/GoodwillAndOtherIntangibleAssetsNetDetails" xlink:href="ftnt-20141231.xsd#GoodwillAndOtherIntangibleAssetsNetDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/GoodwillAndOtherIntangibleAssetsNetEstimatedFutureAmortizationExpenseDetails" xlink:href="ftnt-20141231.xsd#GoodwillAndOtherIntangibleAssetsNetEstimatedFutureAmortizationExpenseDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/GoodwillAndOtherIntangibleAssetsNetTables" xlink:href="ftnt-20141231.xsd#GoodwillAndOtherIntangibleAssetsNetTables" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/IncomeTaxes" xlink:href="ftnt-20141231.xsd#IncomeTaxes" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/IncomeTaxesDeferredTaxAssetsDetails" xlink:href="ftnt-20141231.xsd#IncomeTaxesDeferredTaxAssetsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/IncomeTaxesEffectiveTaxRateReconciliationDetails" xlink:href="ftnt-20141231.xsd#IncomeTaxesEffectiveTaxRateReconciliationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/IncomeTaxesProvisionForIncomeTaxDetails" xlink:href="ftnt-20141231.xsd#IncomeTaxesProvisionForIncomeTaxDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/IncomeTaxesReconciliationOfPreTaxIncomedetails" xlink:href="ftnt-20141231.xsd#IncomeTaxesReconciliationOfPreTaxIncomedetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/IncomeTaxesTables" xlink:href="ftnt-20141231.xsd#IncomeTaxesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/IncomeTaxesUnrecognizedTaxBenefitsDetails" xlink:href="ftnt-20141231.xsd#IncomeTaxesUnrecognizedTaxBenefitsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/Inventory" xlink:href="ftnt-20141231.xsd#Inventory" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/InventoryDetails" xlink:href="ftnt-20141231.xsd#InventoryDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/InventoryTables" xlink:href="ftnt-20141231.xsd#InventoryTables" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/InvestmentsInPrivatelyHeldCompanies" xlink:href="ftnt-20141231.xsd#InvestmentsInPrivatelyHeldCompanies" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/InvestmentsInPrivatelyHeldCompaniesDetails" xlink:href="ftnt-20141231.xsd#InvestmentsInPrivatelyHeldCompaniesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/NetIncomePerShare" xlink:href="ftnt-20141231.xsd#NetIncomePerShare" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/NetIncomePerShareAntiDilutiveSecuritiesDetails" xlink:href="ftnt-20141231.xsd#NetIncomePerShareAntiDilutiveSecuritiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/NetIncomePerShareCalculationOfBasicAndDilutedDetails" xlink:href="ftnt-20141231.xsd#NetIncomePerShareCalculationOfBasicAndDilutedDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/NetIncomePerShareTables" xlink:href="ftnt-20141231.xsd#NetIncomePerShareTables" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/PropertyAndEquipmentnet" xlink:href="ftnt-20141231.xsd#PropertyAndEquipmentnet" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/PropertyAndEquipmentnetDetails" xlink:href="ftnt-20141231.xsd#PropertyAndEquipmentnetDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/PropertyAndEquipmentnetTables" xlink:href="ftnt-20141231.xsd#PropertyAndEquipmentnetTables" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/RelatedPartyTransactions" xlink:href="ftnt-20141231.xsd#RelatedPartyTransactions" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/RelatedPartyTransactionsDetails" xlink:href="ftnt-20141231.xsd#RelatedPartyTransactionsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/ScheduleIi" xlink:href="ftnt-20141231.xsd#ScheduleIi" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/ScheduleIiDetails" xlink:href="ftnt-20141231.xsd#ScheduleIiDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SegmentInformation" xlink:href="ftnt-20141231.xsd#SegmentInformation" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SegmentInformationDetails" xlink:href="ftnt-20141231.xsd#SegmentInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SegmentInformationTables" xlink:href="ftnt-20141231.xsd#SegmentInformationTables" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/StockholdersEquity" xlink:href="ftnt-20141231.xsd#StockholdersEquity" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/StockholdersEquityAllocationOfStockBasedCompensationExpenseDetails" xlink:href="ftnt-20141231.xsd#StockholdersEquityAllocationOfStockBasedCompensationExpenseDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/StockholdersEquityDetails" xlink:href="ftnt-20141231.xsd#StockholdersEquityDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/StockholdersEquityEsppInformationDetails" xlink:href="ftnt-20141231.xsd#StockholdersEquityEsppInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/StockholdersEquityPerformanceStockUnitsDetails" xlink:href="ftnt-20141231.xsd#StockholdersEquityPerformanceStockUnitsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/StockholdersEquityRangeOfOptionsDetails" xlink:href="ftnt-20141231.xsd#StockholdersEquityRangeOfOptionsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/StockholdersEquityRestrictedStockUnitsActivityDetails" xlink:href="ftnt-20141231.xsd#StockholdersEquityRestrictedStockUnitsActivityDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/StockholdersEquityShareRepurchaseProgramDetails" xlink:href="ftnt-20141231.xsd#StockholdersEquityShareRepurchaseProgramDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/StockholdersEquityTables" xlink:href="ftnt-20141231.xsd#StockholdersEquityTables" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="ftnt-20141231.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesAccountsReceivableDetails" xlink:href="ftnt-20141231.xsd#SummaryOfSignificantAccountingPoliciesAccountsReceivableDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesCashCashEquivalentsAndAvailableForSaleInvestmentsDetails" xlink:href="ftnt-20141231.xsd#SummaryOfSignificantAccountingPoliciesCashCashEquivalentsAndAvailableForSaleInvestmentsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesConcentrationOfCreditRiskDetails" xlink:href="ftnt-20141231.xsd#SummaryOfSignificantAccountingPoliciesConcentrationOfCreditRiskDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesDerivativesDetails" xlink:href="ftnt-20141231.xsd#SummaryOfSignificantAccountingPoliciesDerivativesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesForeignCurrencyTranslationDetails" xlink:href="ftnt-20141231.xsd#SummaryOfSignificantAccountingPoliciesForeignCurrencyTranslationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesGoodwillDetails" xlink:href="ftnt-20141231.xsd#SummaryOfSignificantAccountingPoliciesGoodwillDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesOtherIntangibleAssetsDetails" xlink:href="ftnt-20141231.xsd#SummaryOfSignificantAccountingPoliciesOtherIntangibleAssetsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:href="ftnt-20141231.xsd#SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesPropertyAndEquipmentDetails" xlink:href="ftnt-20141231.xsd#SummaryOfSignificantAccountingPoliciesPropertyAndEquipmentDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesRevenueRecognitionDetails" xlink:href="ftnt-20141231.xsd#SummaryOfSignificantAccountingPoliciesRevenueRecognitionDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:href="ftnt-20141231.xsd#SummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesWarrantiesDetails" xlink:href="ftnt-20141231.xsd#SummaryOfSignificantAccountingPoliciesWarrantiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple" />
  <presentationLink xlink:role="http://www.fortinet.com/role/AccumulatedOtherComprehensiveLossIncome" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_520362A791341C745893C90DCE8BBF1B" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ComprehensiveIncomeNoteTextBlock" xlink:label="loc_us-gaap_ComprehensiveIncomeNoteTextBlock_17D65574253C81CEAC59C90DCE8DEF09" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_520362A791341C745893C90DCE8BBF1B" xlink:to="loc_us-gaap_ComprehensiveIncomeNoteTextBlock_17D65574253C81CEAC59C90DCE8DEF09" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/AccumulatedOtherComprehensiveLossIncomeChangesInAccumulatedBalancesOfOtherComprehensiveIncomedetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_05E0D4899C8DAEB1BB53C90DD3F7C420" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_C7A3B5858078F6E036DEC90DD3F7100F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_05E0D4899C8DAEB1BB53C90DD3F7C420" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_C7A3B5858078F6E036DEC90DD3F7100F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_28C311E159AE3B70FCD6C90DD3F76E56" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_C7A3B5858078F6E036DEC90DD3F7100F" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_28C311E159AE3B70FCD6C90DD3F76E56" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_EC1E111EC23AFA57C432C90DD3F743AD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_28C311E159AE3B70FCD6C90DD3F76E56" xlink:to="loc_us-gaap_EquityComponentDomain_EC1E111EC23AFA57C432C90DD3F743AD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_66DFDBADC604735C7997C90DD3F7138C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_EC1E111EC23AFA57C432C90DD3F743AD" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_66DFDBADC604735C7997C90DD3F7138C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_C2948CB24F31EAC33642C90DD3F76EAA" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_EC1E111EC23AFA57C432C90DD3F743AD" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_C2948CB24F31EAC33642C90DD3F76EAA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_2655D9681E26991CED43C90DD3F78C7A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_C7A3B5858078F6E036DEC90DD3F7100F" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_2655D9681E26991CED43C90DD3F78C7A" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_AccumulatedOtherComprehensiveIncomeRollForward" xlink:label="loc_ftnt_AccumulatedOtherComprehensiveIncomeRollForward_F83FB91A071133A5A058C90DD3F8876D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_2655D9681E26991CED43C90DD3F78C7A" xlink:to="loc_ftnt_AccumulatedOtherComprehensiveIncomeRollForward_F83FB91A071133A5A058C90DD3F8876D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1_EE56A68FFC235D0F1E4DC90DD3F81D64" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_AccumulatedOtherComprehensiveIncomeRollForward_F83FB91A071133A5A058C90DD3F8876D" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1_EE56A68FFC235D0F1E4DC90DD3F81D64" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax_DD41E05F9034DC275B84C90DD3F8D579" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_AccumulatedOtherComprehensiveIncomeRollForward_F83FB91A071133A5A058C90DD3F8876D" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax_DD41E05F9034DC275B84C90DD3F8D579" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_AB60927FEAD38866FBB0C90DD3F8770D" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_AccumulatedOtherComprehensiveIncomeRollForward_F83FB91A071133A5A058C90DD3F8876D" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_AB60927FEAD38866FBB0C90DD3F8770D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_BAF38AC875F3BE634AFAC90DD3F9B92E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_AccumulatedOtherComprehensiveIncomeRollForward_F83FB91A071133A5A058C90DD3F8876D" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_BAF38AC875F3BE634AFAC90DD3F9B92E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1_1DD0FA5FD5E3826FCDF5C90DD3F95B50" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_AccumulatedOtherComprehensiveIncomeRollForward_F83FB91A071133A5A058C90DD3F8876D" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1_1DD0FA5FD5E3826FCDF5C90DD3F95B50" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_AccumulatedOtherComprehensiveIncomeTaxRollForward" xlink:label="loc_ftnt_AccumulatedOtherComprehensiveIncomeTaxRollForward_8458B02699C57F16F93BC90DD3F9F350" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_2655D9681E26991CED43C90DD3F78C7A" xlink:to="loc_ftnt_AccumulatedOtherComprehensiveIncomeTaxRollForward_8458B02699C57F16F93BC90DD3F9F350" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_AccumulatedOtherComprehensiveIncomeLossTax" xlink:label="loc_ftnt_AccumulatedOtherComprehensiveIncomeLossTax_EF91A7F6CF9F7C4A064FC90DD3F91DFF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_AccumulatedOtherComprehensiveIncomeTaxRollForward_8458B02699C57F16F93BC90DD3F9F350" xlink:to="loc_ftnt_AccumulatedOtherComprehensiveIncomeLossTax_EF91A7F6CF9F7C4A064FC90DD3F91DFF" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OtherComprehensiveIncomeLossbeforeReclassificationsTax" xlink:label="loc_ftnt_OtherComprehensiveIncomeLossbeforeReclassificationsTax_8137BB9FE9584DFDCF4CC90DD3F99B57" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_AccumulatedOtherComprehensiveIncomeTaxRollForward_8458B02699C57F16F93BC90DD3F9F350" xlink:to="loc_ftnt_OtherComprehensiveIncomeLossbeforeReclassificationsTax_8137BB9FE9584DFDCF4CC90DD3F99B57" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodTax" xlink:label="loc_ftnt_ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodTax_88AED3B831B69A886B86C90DD3F934B0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_AccumulatedOtherComprehensiveIncomeTaxRollForward_8458B02699C57F16F93BC90DD3F9F350" xlink:to="loc_ftnt_ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodTax_88AED3B831B69A886B86C90DD3F934B0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_7DBEA7BEB5F251DD0656C90DD3F92C2B" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_AccumulatedOtherComprehensiveIncomeTaxRollForward_8458B02699C57F16F93BC90DD3F9F350" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTax_7DBEA7BEB5F251DD0656C90DD3F92C2B" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_AccumulatedOtherComprehensiveIncomeLossTax" xlink:label="loc_ftnt_AccumulatedOtherComprehensiveIncomeLossTax_8665B42479316C77D2CEC90DD3F992C0" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_AccumulatedOtherComprehensiveIncomeTaxRollForward_8458B02699C57F16F93BC90DD3F9F350" xlink:to="loc_ftnt_AccumulatedOtherComprehensiveIncomeLossTax_8665B42479316C77D2CEC90DD3F992C0" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/AccumulatedOtherComprehensiveLossIncomeReclassificationOutOfAccumulatedOtherComprehensiveIncomeDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_256D6076DA3C3E02D872C8AEDF92407E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_3910FA6748D911BA9BEDC8AEDF920F7B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_256D6076DA3C3E02D872C8AEDF92407E" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_3910FA6748D911BA9BEDC8AEDF920F7B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_9395BE985E641134ACBAC8AEDF927215" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_3910FA6748D911BA9BEDC8AEDF920F7B" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_9395BE985E641134ACBAC8AEDF927215" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_4A5172ADFBFCD1151244C8AEDF9268A6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_9395BE985E641134ACBAC8AEDF927215" xlink:to="loc_us-gaap_EquityComponentDomain_4A5172ADFBFCD1151244C8AEDF9268A6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_A72089A68BE0864905C7C8AEDF920F7D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_4A5172ADFBFCD1151244C8AEDF9268A6" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_A72089A68BE0864905C7C8AEDF920F7D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_6CBAFE3A82A4D55DAA93C8AEDF92744E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_4A5172ADFBFCD1151244C8AEDF9268A6" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_6CBAFE3A82A4D55DAA93C8AEDF92744E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_E6F531DCF414CD43B84FC8AEDF9297AE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_3910FA6748D911BA9BEDC8AEDF920F7B" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_E6F531DCF414CD43B84FC8AEDF9297AE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_91E3BD7E629CC699B598C8AEDF929AFE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_E6F531DCF414CD43B84FC8AEDF9297AE" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_91E3BD7E629CC699B598C8AEDF929AFE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_41A884E0E904BB9385D9C8AEDF927BFD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_91E3BD7E629CC699B598C8AEDF929AFE" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_41A884E0E904BB9385D9C8AEDF927BFD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_1C496CB9DB7A93C0C9F3C8AEDF92C6EB" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_3910FA6748D911BA9BEDC8AEDF920F7B" xlink:to="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_1C496CB9DB7A93C0C9F3C8AEDF92C6EB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_74F3FA413A69BD19EE1CC8AEDF92A435" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_1C496CB9DB7A93C0C9F3C8AEDF92C6EB" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_74F3FA413A69BD19EE1CC8AEDF92A435" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_825743D4FA67A9AE6882C8AEDF9233BD" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_1C496CB9DB7A93C0C9F3C8AEDF92C6EB" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_825743D4FA67A9AE6882C8AEDF9233BD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_A67A782F6F1DE255C2F8C8AEDF92F3F0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_1C496CB9DB7A93C0C9F3C8AEDF92C6EB" xlink:to="loc_us-gaap_NetIncomeLoss_A67A782F6F1DE255C2F8C8AEDF92F3F0" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/AccumulatedOtherComprehensiveLossIncomeTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_763CB29BD6DE847D4060C90DCED67C32" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_2E5EBFF69461F8877601C90DCED72087" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_763CB29BD6DE847D4060C90DCED67C32" xlink:to="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_2E5EBFF69461F8877601C90DCED72087" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_9201340358684A972C5BC90DCED83CAE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_763CB29BD6DE847D4060C90DCED67C32" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_9201340358684A972C5BC90DCED83CAE" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/BusinessCombinations" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_F9D35AEB34218E8D7FF7BBCCC42BABB7" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationDisclosureTextBlock" xlink:label="loc_us-gaap_BusinessCombinationDisclosureTextBlock_9CC612112F3DAAE1C677BBCCC42B73DD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_F9D35AEB34218E8D7FF7BBCCC42BABB7" xlink:to="loc_us-gaap_BusinessCombinationDisclosureTextBlock_9CC612112F3DAAE1C677BBCCC42B73DD" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/BusinessCombinations2013AcquisitionsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_48242BC68A965E6461C1CC4125FB8A29" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8BC6C9A28BBADA8F3BCDCC4125FB7297" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_48242BC68A965E6461C1CC4125FB8A29" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8BC6C9A28BBADA8F3BCDCC4125FB7297" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_DD4C02D395F101BF20CBCC4125FB605F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8BC6C9A28BBADA8F3BCDCC4125FB7297" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_DD4C02D395F101BF20CBCC4125FB605F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_4E49E686AAF56BFE584ACC4125FB653F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_DD4C02D395F101BF20CBCC4125FB605F" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_4E49E686AAF56BFE584ACC4125FB653F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InProcessResearchAndDevelopmentMember" xlink:label="loc_us-gaap_InProcessResearchAndDevelopmentMember_6E81C5F23CAED5F1234BCC4125FBB1B5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_4E49E686AAF56BFE584ACC4125FB653F" xlink:to="loc_us-gaap_InProcessResearchAndDevelopmentMember_6E81C5F23CAED5F1234BCC4125FBB1B5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_97FAA21BAA097D2B3B31CC4125FB5725" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8BC6C9A28BBADA8F3BCDCC4125FB7297" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_97FAA21BAA097D2B3B31CC4125FB5725" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_EDB80FEBF2DFB6C65D65CC4125FBC312" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_97FAA21BAA097D2B3B31CC4125FB5725" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_EDB80FEBF2DFB6C65D65CC4125FBC312" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="loc_us-gaap_CostOfSalesMember_CCEB476ADACA67057D49CC4125FB08A3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_EDB80FEBF2DFB6C65D65CC4125FBC312" xlink:to="loc_us-gaap_CostOfSalesMember_CCEB476ADACA67057D49CC4125FB08A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_D60DC647291E1270C594CC4125FB1DC5" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8BC6C9A28BBADA8F3BCDCC4125FB7297" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_D60DC647291E1270C594CC4125FB1DC5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_49FDB6BDB773420C6852CC4125FCCB1F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_D60DC647291E1270C594CC4125FB1DC5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_49FDB6BDB773420C6852CC4125FCCB1F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_5EB26E1C776F57D8DB21CC4125FC1827" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_49FDB6BDB773420C6852CC4125FCCB1F" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_5EB26E1C776F57D8DB21CC4125FC1827" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="loc_us-gaap_CustomerRelationshipsMember_8506F6C6E31FE6EA8E09CC4125FC80FB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_49FDB6BDB773420C6852CC4125FCCB1F" xlink:to="loc_us-gaap_CustomerRelationshipsMember_8506F6C6E31FE6EA8E09CC4125FC80FB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_602538D4A6B509795345CC4125FC938A" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8BC6C9A28BBADA8F3BCDCC4125FB7297" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_602538D4A6B509795345CC4125FC938A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0931BF62B6DC5C005A7ACC4125FCDF61" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_602538D4A6B509795345CC4125FC938A" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0931BF62B6DC5C005A7ACC4125FCDF61" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_CoyotePointSystemsInc.Member" xlink:label="loc_ftnt_CoyotePointSystemsInc.Member_649AAB7CEC7BCBB10CD9CC4125FCE8E5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0931BF62B6DC5C005A7ACC4125FCDF61" xlink:to="loc_ftnt_CoyotePointSystemsInc.Member_649AAB7CEC7BCBB10CD9CC4125FCE8E5" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_XteraCommunicationsInc.Member" xlink:label="loc_ftnt_XteraCommunicationsInc.Member_C9B1399C0CF6929A7DF4CC4125FCA820" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0931BF62B6DC5C005A7ACC4125FCDF61" xlink:to="loc_ftnt_XteraCommunicationsInc.Member_C9B1399C0CF6929A7DF4CC4125FCA820" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8BC6C9A28BBADA8F3BCDCC4125FB7297" xlink:to="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_06B2ECFD593FB688AE2FCC4125FC2121" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_06B2ECFD593FB688AE2FCC4125FC2121" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_6FD724BE2CFBB9362253CC4125FCF60E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_6FD724BE2CFBB9362253CC4125FCF60E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_6C3B2F48DDD4E9F437BCCC4125FC8991" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_6C3B2F48DDD4E9F437BCCC4125FC8991" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_EEEE4393D977E3C8EF75CC4125FC2797" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_EEEE4393D977E3C8EF75CC4125FC2797" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_C24B1995ECB768E7D3D1CC4125FCBC79" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_C24B1995ECB768E7D3D1CC4125FCBC79" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_F63A9DA0F8A1B7459AAECC4125FC9A41" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_F63A9DA0F8A1B7459AAECC4125FC9A41" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets_9BAAA0216CD4E40CC5BECC4125FC72E0" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets_9BAAA0216CD4E40CC5BECC4125FC72E0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_867DCA1A925C6FDAC2DDCC4125FCCFAC" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_Goodwill_867DCA1A925C6FDAC2DDCC4125FCCFAC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_E04716B8DBAE6B9C4719CC4125FD4C07" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_E04716B8DBAE6B9C4719CC4125FD4C07" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_666723AAB2FB5E3F210CCC4125FDD17B" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_666723AAB2FB5E3F210CCC4125FDD17B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_02B9D6BD49777622A11ECC4125FDB1FF" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_02B9D6BD49777622A11ECC4125FDB1FF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities_C95FDFFDB3F9AFC7037CCC4125FD37BF" xlink:type="locator" />
    <presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities_C95FDFFDB3F9AFC7037CCC4125FD37BF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_4E58549AF44384410DF5CC4125FD4A8B" xlink:type="locator" />
    <presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_4E58549AF44384410DF5CC4125FD4A8B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_E8CAE11C06E5574562A8CC4125FD437A" xlink:type="locator" />
    <presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_E8CAE11C06E5574562A8CC4125FD437A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_1FF04D34B35236578083CC4125FD5B56" xlink:type="locator" />
    <presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_1FF04D34B35236578083CC4125FD5B56" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_FiniteLivedIntangibleAssetEstimatedRemainingUsefulLife" xlink:label="loc_ftnt_FiniteLivedIntangibleAssetEstimatedRemainingUsefulLife_7BB4DDB725D3004FEE05CC8D74EE4FC9" xlink:type="locator" />
    <presentationArc order="16" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_ftnt_FiniteLivedIntangibleAssetEstimatedRemainingUsefulLife_7BB4DDB725D3004FEE05CC8D74EE4FC9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_ECA33AC7AF1DE59EE179CC4125FD7163" xlink:type="locator" />
    <presentationArc order="17" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_ECA33AC7AF1DE59EE179CC4125FD7163" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_6ACE985645338197569ACC4125FD19B9" xlink:type="locator" />
    <presentationArc order="18" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_6ACE985645338197569ACC4125FD19B9" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssets" xlink:label="loc_ftnt_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssets_E92C28B6500B9A76371BCC4125FD001B" xlink:type="locator" />
    <presentationArc order="19" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_ftnt_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssets_E92C28B6500B9A76371BCC4125FD001B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_74B0CFC1CB7E8B861E1ECC4125FDE6D6" xlink:type="locator" />
    <presentationArc order="20" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5E9D9736AB49ABCA16A3CC4125FC411E" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_74B0CFC1CB7E8B861E1ECC4125FDE6D6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/BusinessCombinationsTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_EF2A6937F58EB0C1635E7F5BBEBBC022" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_E134811BC99F3BA418787F5BBEBB3F55" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_EF2A6937F58EB0C1635E7F5BBEBBC022" xlink:to="loc_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_E134811BC99F3BA418787F5BBEBB3F55" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/CommitmentsAndContingencies" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_15BADD6C9666D32C7891BBCCC3BA5D4B" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_547DCC055972267C0CD0BBCCC3BAAFF2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_15BADD6C9666D32C7891BBCCC3BA5D4B" xlink:to="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_547DCC055972267C0CD0BBCCC3BAAFF2" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/CommitmentsAndContingenciesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_A48A963B8B2C4BBCE03560A345223CF5" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLeasesRentExpenseNet" xlink:label="loc_us-gaap_OperatingLeasesRentExpenseNet_64B2752EA0AEFEE823F060A345230C4A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_A48A963B8B2C4BBCE03560A345223CF5" xlink:to="loc_us-gaap_OperatingLeasesRentExpenseNet_64B2752EA0AEFEE823F060A345230C4A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PurchaseObligation" xlink:label="loc_us-gaap_PurchaseObligation_A26BF91023FDA9A2914860A34523B653" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_A48A963B8B2C4BBCE03560A345223CF5" xlink:to="loc_us-gaap_PurchaseObligation_A26BF91023FDA9A2914860A34523B653" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherCommitment" xlink:label="loc_us-gaap_OtherCommitment_2BB2C9F6B9C87B4418C360A34523DF1A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_A48A963B8B2C4BBCE03560A345223CF5" xlink:to="loc_us-gaap_OtherCommitment_2BB2C9F6B9C87B4418C360A34523DF1A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/CommitmentsAndContingenciesMinimumOperatingLeasePaymentsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_3B990B3301C1CA6AA32960A3451BFDF6" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_8379729AAD2B7BF3CAF660A3451B5004" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_3B990B3301C1CA6AA32960A3451BFDF6" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_8379729AAD2B7BF3CAF660A3451B5004" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_5189CEFD153D856ED6D960A3451CE829" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_8379729AAD2B7BF3CAF660A3451B5004" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_5189CEFD153D856ED6D960A3451CE829" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_7E0EA5CFDABF07DC71EF60A3451CF817" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_8379729AAD2B7BF3CAF660A3451B5004" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_7E0EA5CFDABF07DC71EF60A3451CF817" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_C4C34112DDFBB31CE30860A3451C849C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_8379729AAD2B7BF3CAF660A3451B5004" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_C4C34112DDFBB31CE30860A3451C849C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_1175D90C9303C8BDDA4C60A3451C187B" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_8379729AAD2B7BF3CAF660A3451B5004" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_1175D90C9303C8BDDA4C60A3451C187B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_1E8F0596BFF88E50720460A3451C377F" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_8379729AAD2B7BF3CAF660A3451B5004" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_1E8F0596BFF88E50720460A3451C377F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_79E8E63C338B162FE87760A3451CA7A7" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_8379729AAD2B7BF3CAF660A3451B5004" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_79E8E63C338B162FE87760A3451CA7A7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_A61DF277F57634EBB2CB60A3451C1711" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_8379729AAD2B7BF3CAF660A3451B5004" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_A61DF277F57634EBB2CB60A3451C1711" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_SubleaseCommitmentsAbstract" xlink:label="loc_ftnt_SubleaseCommitmentsAbstract_9FA693693A38140438CC60A3451C7957" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_3B990B3301C1CA6AA32960A3451BFDF6" xlink:to="loc_ftnt_SubleaseCommitmentsAbstract_9FA693693A38140438CC60A3451C7957" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsNextTwelveMonths" xlink:label="loc_ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsNextTwelveMonths_D21A99231606C9F24EE060A3451C6628" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_SubleaseCommitmentsAbstract_9FA693693A38140438CC60A3451C7957" xlink:to="loc_ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsNextTwelveMonths_D21A99231606C9F24EE060A3451C6628" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinTwoYears" xlink:label="loc_ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinTwoYears_76856397F7FCCAD8F5B760A3451C405C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_SubleaseCommitmentsAbstract_9FA693693A38140438CC60A3451C7957" xlink:to="loc_ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinTwoYears_76856397F7FCCAD8F5B760A3451C405C" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinThreeYears" xlink:label="loc_ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinThreeYears_C7803C77EBA6734F38F760A3451C456A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_SubleaseCommitmentsAbstract_9FA693693A38140438CC60A3451C7957" xlink:to="loc_ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinThreeYears_C7803C77EBA6734F38F760A3451C456A" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinFourYears" xlink:label="loc_ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinFourYears_5C510EE12457A6BED29A60A3451C48E7" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_SubleaseCommitmentsAbstract_9FA693693A38140438CC60A3451C7957" xlink:to="loc_ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinFourYears_5C510EE12457A6BED29A60A3451C48E7" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinFiveYears" xlink:label="loc_ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinFiveYears_B91B7696868D614874FC60A3451C0F1A" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_SubleaseCommitmentsAbstract_9FA693693A38140438CC60A3451C7957" xlink:to="loc_ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinFiveYears_B91B7696868D614874FC60A3451C0F1A" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueafterFiveYears" xlink:label="loc_ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueafterFiveYears_4670845CD6472E9C781E60A3451C945F" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_SubleaseCommitmentsAbstract_9FA693693A38140438CC60A3451C7957" xlink:to="loc_ftnt_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueafterFiveYears_4670845CD6472E9C781E60A3451C945F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals_1FDBCAEC942574F2AD2760A3451D39E3" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_SubleaseCommitmentsAbstract_9FA693693A38140438CC60A3451C7957" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals_1FDBCAEC942574F2AD2760A3451D39E3" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OperatingCommitmentsNetAbstract" xlink:label="loc_ftnt_OperatingCommitmentsNetAbstract_CFF807FB82274F67455260A3451D3A16" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_3B990B3301C1CA6AA32960A3451BFDF6" xlink:to="loc_ftnt_OperatingCommitmentsNetAbstract_CFF807FB82274F67455260A3451D3A16" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OperatingLeasesNetFutureMinimumPaymentsDueNextTwelveMonths" xlink:label="loc_ftnt_OperatingLeasesNetFutureMinimumPaymentsDueNextTwelveMonths_5CD835FD6766AAA855BC60A3451DCEF6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_OperatingCommitmentsNetAbstract_CFF807FB82274F67455260A3451D3A16" xlink:to="loc_ftnt_OperatingLeasesNetFutureMinimumPaymentsDueNextTwelveMonths_5CD835FD6766AAA855BC60A3451DCEF6" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OperatingLeasesNetFutureMinimumPaymentsDueinTwoYears" xlink:label="loc_ftnt_OperatingLeasesNetFutureMinimumPaymentsDueinTwoYears_8E3348AC6075FABC66BB60A3451D266F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_OperatingCommitmentsNetAbstract_CFF807FB82274F67455260A3451D3A16" xlink:to="loc_ftnt_OperatingLeasesNetFutureMinimumPaymentsDueinTwoYears_8E3348AC6075FABC66BB60A3451D266F" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OperatingLeasesNetFutureMinimumPaymentsDueinThreeYears" xlink:label="loc_ftnt_OperatingLeasesNetFutureMinimumPaymentsDueinThreeYears_F07862EBB56D1E6F00E160A3451DC93E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_OperatingCommitmentsNetAbstract_CFF807FB82274F67455260A3451D3A16" xlink:to="loc_ftnt_OperatingLeasesNetFutureMinimumPaymentsDueinThreeYears_F07862EBB56D1E6F00E160A3451DC93E" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OperatingLeasesNetFutureMinimumPaymentsDueinFourYears" xlink:label="loc_ftnt_OperatingLeasesNetFutureMinimumPaymentsDueinFourYears_5138EC761B540437130560A3451DB6CB" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_OperatingCommitmentsNetAbstract_CFF807FB82274F67455260A3451D3A16" xlink:to="loc_ftnt_OperatingLeasesNetFutureMinimumPaymentsDueinFourYears_5138EC761B540437130560A3451DB6CB" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OperatingLeasesNetFutureMinimumPaymentsDueinFiveYears" xlink:label="loc_ftnt_OperatingLeasesNetFutureMinimumPaymentsDueinFiveYears_24BBE7B1A0C3F765513660A3451DEE29" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_OperatingCommitmentsNetAbstract_CFF807FB82274F67455260A3451D3A16" xlink:to="loc_ftnt_OperatingLeasesNetFutureMinimumPaymentsDueinFiveYears_24BBE7B1A0C3F765513660A3451DEE29" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OperatingLeasesNetFutureMinimumPaymentsDueThereafter" xlink:label="loc_ftnt_OperatingLeasesNetFutureMinimumPaymentsDueThereafter_EA057C7BD8CE5E281DDA60A3451DAC79" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_OperatingCommitmentsNetAbstract_CFF807FB82274F67455260A3451D3A16" xlink:to="loc_ftnt_OperatingLeasesNetFutureMinimumPaymentsDueThereafter_EA057C7BD8CE5E281DDA60A3451DAC79" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OperatingLeasesNetFutureMinimumPayments" xlink:label="loc_ftnt_OperatingLeasesNetFutureMinimumPayments_3A3BB5E3030C09F3AA7F60A3451DFE78" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_OperatingCommitmentsNetAbstract_CFF807FB82274F67455260A3451D3A16" xlink:to="loc_ftnt_OperatingLeasesNetFutureMinimumPayments_3A3BB5E3030C09F3AA7F60A3451DFE78" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PurchaseObligationFiscalYearMaturityAbstract" xlink:label="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_9B2C7506DBE453242B7560A3451DC2BD" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_3B990B3301C1CA6AA32960A3451BFDF6" xlink:to="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_9B2C7506DBE453242B7560A3451DC2BD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PurchaseObligationDueInNextTwelveMonths" xlink:label="loc_us-gaap_PurchaseObligationDueInNextTwelveMonths_D8C693C91C59A0ECCBBC60A3451DC558" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_9B2C7506DBE453242B7560A3451DC2BD" xlink:to="loc_us-gaap_PurchaseObligationDueInNextTwelveMonths_D8C693C91C59A0ECCBBC60A3451DC558" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PurchaseObligationDueInSecondYear" xlink:label="loc_us-gaap_PurchaseObligationDueInSecondYear_05DAF64BAA0F6D6CE70F60A3451D60CB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_9B2C7506DBE453242B7560A3451DC2BD" xlink:to="loc_us-gaap_PurchaseObligationDueInSecondYear_05DAF64BAA0F6D6CE70F60A3451D60CB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PurchaseObligationDueInThirdYear" xlink:label="loc_us-gaap_PurchaseObligationDueInThirdYear_DB691400BA08A4CDC81160A3451D36D2" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_9B2C7506DBE453242B7560A3451DC2BD" xlink:to="loc_us-gaap_PurchaseObligationDueInThirdYear_DB691400BA08A4CDC81160A3451D36D2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PurchaseObligationDueInFourthYear" xlink:label="loc_us-gaap_PurchaseObligationDueInFourthYear_8D5F1C2DC4AC0E680E0460A3451D9506" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_9B2C7506DBE453242B7560A3451DC2BD" xlink:to="loc_us-gaap_PurchaseObligationDueInFourthYear_8D5F1C2DC4AC0E680E0460A3451D9506" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PurchaseObligationDueInFifthYear" xlink:label="loc_us-gaap_PurchaseObligationDueInFifthYear_2B54BD180C3E155C76BD60A3451E0CA0" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_9B2C7506DBE453242B7560A3451DC2BD" xlink:to="loc_us-gaap_PurchaseObligationDueInFifthYear_2B54BD180C3E155C76BD60A3451E0CA0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PurchaseObligationDueAfterFifthYear" xlink:label="loc_us-gaap_PurchaseObligationDueAfterFifthYear_328438F21FFF48C481F260A3451E609D" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_9B2C7506DBE453242B7560A3451DC2BD" xlink:to="loc_us-gaap_PurchaseObligationDueAfterFifthYear_328438F21FFF48C481F260A3451E609D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PurchaseObligation" xlink:label="loc_us-gaap_PurchaseObligation_42E993EE3D78645F1EE160A3451E7CAA" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_9B2C7506DBE453242B7560A3451DC2BD" xlink:to="loc_us-gaap_PurchaseObligation_42E993EE3D78645F1EE160A3451E7CAA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherCommitmentsAbstract" xlink:label="loc_us-gaap_OtherCommitmentsAbstract_EB4FE8D6926E86E852CC60A3451E4E95" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_3B990B3301C1CA6AA32960A3451BFDF6" xlink:to="loc_us-gaap_OtherCommitmentsAbstract_EB4FE8D6926E86E852CC60A3451E4E95" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherCommitmentDueInNextTwelveMonths" xlink:label="loc_us-gaap_OtherCommitmentDueInNextTwelveMonths_79A1A8C1BDBCF478626C60A3451E6CD3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsAbstract_EB4FE8D6926E86E852CC60A3451E4E95" xlink:to="loc_us-gaap_OtherCommitmentDueInNextTwelveMonths_79A1A8C1BDBCF478626C60A3451E6CD3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherCommitmentDueInSecondYear" xlink:label="loc_us-gaap_OtherCommitmentDueInSecondYear_3C034A8970FC59E7AFF560A3451ED564" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsAbstract_EB4FE8D6926E86E852CC60A3451E4E95" xlink:to="loc_us-gaap_OtherCommitmentDueInSecondYear_3C034A8970FC59E7AFF560A3451ED564" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherCommitmentDueInThirdYear" xlink:label="loc_us-gaap_OtherCommitmentDueInThirdYear_CBF2A51F7CB4BDE3724E60A3451E6EC8" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsAbstract_EB4FE8D6926E86E852CC60A3451E4E95" xlink:to="loc_us-gaap_OtherCommitmentDueInThirdYear_CBF2A51F7CB4BDE3724E60A3451E6EC8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherCommitmentDueInFourthYear" xlink:label="loc_us-gaap_OtherCommitmentDueInFourthYear_95A2C4BAAB10DCA9B9BA60A3451E92AB" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsAbstract_EB4FE8D6926E86E852CC60A3451E4E95" xlink:to="loc_us-gaap_OtherCommitmentDueInFourthYear_95A2C4BAAB10DCA9B9BA60A3451E92AB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherCommitmentDueInFifthYear" xlink:label="loc_us-gaap_OtherCommitmentDueInFifthYear_356DFE7CD88C068DE4D160A3451E8C20" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsAbstract_EB4FE8D6926E86E852CC60A3451E4E95" xlink:to="loc_us-gaap_OtherCommitmentDueInFifthYear_356DFE7CD88C068DE4D160A3451E8C20" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherCommitmentDueAfterFifthYear" xlink:label="loc_us-gaap_OtherCommitmentDueAfterFifthYear_610C1144A1665291AB6060A3451E665D" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsAbstract_EB4FE8D6926E86E852CC60A3451E4E95" xlink:to="loc_us-gaap_OtherCommitmentDueAfterFifthYear_610C1144A1665291AB6060A3451E665D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherCommitment" xlink:label="loc_us-gaap_OtherCommitment_0B7AAFC042DD266A9D9860A3451E8053" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsAbstract_EB4FE8D6926E86E852CC60A3451E4E95" xlink:to="loc_us-gaap_OtherCommitment_0B7AAFC042DD266A9D9860A3451E8053" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ContractualObligation" xlink:label="loc_us-gaap_ContractualObligation_B75F2C0BE4313CF9C33D60A3451E3CD3" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_3B990B3301C1CA6AA32960A3451BFDF6" xlink:to="loc_us-gaap_ContractualObligation_B75F2C0BE4313CF9C33D60A3451E3CD3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ContractualObligationDueInNextTwelveMonths" xlink:label="loc_us-gaap_ContractualObligationDueInNextTwelveMonths_19EF3A1A9D8CBC710D7060A3451EA9A6" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_3B990B3301C1CA6AA32960A3451BFDF6" xlink:to="loc_us-gaap_ContractualObligationDueInNextTwelveMonths_19EF3A1A9D8CBC710D7060A3451EA9A6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ContractualObligationDueInSecondYear" xlink:label="loc_us-gaap_ContractualObligationDueInSecondYear_751C0254F8B728FDA2E460A3451E92D1" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_3B990B3301C1CA6AA32960A3451BFDF6" xlink:to="loc_us-gaap_ContractualObligationDueInSecondYear_751C0254F8B728FDA2E460A3451E92D1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ContractualObligationDueInThirdYear" xlink:label="loc_us-gaap_ContractualObligationDueInThirdYear_30F27D5C79D566B4546360A3451EE1A4" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_3B990B3301C1CA6AA32960A3451BFDF6" xlink:to="loc_us-gaap_ContractualObligationDueInThirdYear_30F27D5C79D566B4546360A3451EE1A4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ContractualObligationDueInFourthYear" xlink:label="loc_us-gaap_ContractualObligationDueInFourthYear_6BDDFA690781BD1D03EE60A3451FC2B8" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_3B990B3301C1CA6AA32960A3451BFDF6" xlink:to="loc_us-gaap_ContractualObligationDueInFourthYear_6BDDFA690781BD1D03EE60A3451FC2B8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ContractualObligationDueInFifthYear" xlink:label="loc_us-gaap_ContractualObligationDueInFifthYear_3552C7D4439460158A9660A3452058BB" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_3B990B3301C1CA6AA32960A3451BFDF6" xlink:to="loc_us-gaap_ContractualObligationDueInFifthYear_3552C7D4439460158A9660A3452058BB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ContractualObligationDueAfterFifthYear" xlink:label="loc_us-gaap_ContractualObligationDueAfterFifthYear_CB31A9C2B3460D4B369E60A3452017C8" xlink:type="locator" />
    <presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_3B990B3301C1CA6AA32960A3451BFDF6" xlink:to="loc_us-gaap_ContractualObligationDueAfterFifthYear_CB31A9C2B3460D4B369E60A3452017C8" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/CommitmentsAndContingenciesTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_CA85797A316FFD1D2E59BBCCC4DDDF5E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ContractualObligationFiscalYearMaturityScheduleTableTextBlock" xlink:label="loc_us-gaap_ContractualObligationFiscalYearMaturityScheduleTableTextBlock_E3994167A0DB72FA8315BBCCC4DD4B1F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_CA85797A316FFD1D2E59BBCCC4DDDF5E" xlink:to="loc_us-gaap_ContractualObligationFiscalYearMaturityScheduleTableTextBlock_E3994167A0DB72FA8315BBCCC4DD4B1F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_CA0B341E9C7843CCB89DC8A6E8580FB1" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_F9F75D2B67BD94CFB387C8A6E8583D12" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_CA0B341E9C7843CCB89DC8A6E8580FB1" xlink:to="loc_us-gaap_StatementTable_F9F75D2B67BD94CFB387C8A6E8583D12" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_977E7DE6D4A0CD058094C8A6E858D666" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_F9F75D2B67BD94CFB387C8A6E8583D12" xlink:to="loc_us-gaap_StatementScenarioAxis_977E7DE6D4A0CD058094C8A6E858D666" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_89360D5E140B4F636CA7C8A6E858822A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementScenarioAxis_977E7DE6D4A0CD058094C8A6E858D666" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_89360D5E140B4F636CA7C8A6E858822A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_E9BB9BBA294414050DE4C8A6E858AF1E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_F9F75D2B67BD94CFB387C8A6E8583D12" xlink:to="loc_us-gaap_StatementLineItems_E9BB9BBA294414050DE4C8A6E858AF1E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_5B84121F568B2F4D4521C8A6E858F25E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_E9BB9BBA294414050DE4C8A6E858AF1E" xlink:to="loc_us-gaap_AssetsAbstract_5B84121F568B2F4D4521C8A6E858F25E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_FAC52BBB4385CBA8340FC8A6E85A198A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_5B84121F568B2F4D4521C8A6E858F25E" xlink:to="loc_us-gaap_AssetsCurrentAbstract_FAC52BBB4385CBA8340FC8A6E85A198A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_F558236181DDE2CFE1E3C8A6E85A18FB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_FAC52BBB4385CBA8340FC8A6E85A198A" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_F558236181DDE2CFE1E3C8A6E85A18FB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShortTermInvestments" xlink:label="loc_us-gaap_ShortTermInvestments_59BE0FAEB434D679849AC8A6E85AEAC2" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_FAC52BBB4385CBA8340FC8A6E85A198A" xlink:to="loc_us-gaap_ShortTermInvestments_59BE0FAEB434D679849AC8A6E85AEAC2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_1510C9A61D3BC59FC48FC8A6E85A7E1B" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_FAC52BBB4385CBA8340FC8A6E85A198A" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_1510C9A61D3BC59FC48FC8A6E85A7E1B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_AEC363CE807FC84DC4ECC8A6E85A5490" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_FAC52BBB4385CBA8340FC8A6E85A198A" xlink:to="loc_us-gaap_InventoryNet_AEC363CE807FC84DC4ECC8A6E85A5490" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxAssetsNetCurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsNetCurrent_CD5D72D5947B54409E45C8A6E85ABB39" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_FAC52BBB4385CBA8340FC8A6E85A198A" xlink:to="loc_us-gaap_DeferredTaxAssetsNetCurrent_CD5D72D5947B54409E45C8A6E85ABB39" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_605B517AF5DBF7471E0CC8A6E85A38EA" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_FAC52BBB4385CBA8340FC8A6E85A198A" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_605B517AF5DBF7471E0CC8A6E85A38EA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_302EDFEF23C877759FD4C8A6E85A3716" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_FAC52BBB4385CBA8340FC8A6E85A198A" xlink:to="loc_us-gaap_AssetsCurrent_302EDFEF23C877759FD4C8A6E85A3716" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongTermInvestments" xlink:label="loc_us-gaap_LongTermInvestments_97965664ACAD99B4D900C8A6E85AE896" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_5B84121F568B2F4D4521C8A6E858F25E" xlink:to="loc_us-gaap_LongTermInvestments_97965664ACAD99B4D900C8A6E85AE896" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_BECE04C5274E092A14BCC8A6E85A17EA" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_5B84121F568B2F4D4521C8A6E858F25E" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_BECE04C5274E092A14BCC8A6E85A17EA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxAssetsNetNoncurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsNetNoncurrent_3F81552F643317DF3D62C8A6E85A76D3" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_5B84121F568B2F4D4521C8A6E858F25E" xlink:to="loc_us-gaap_DeferredTaxAssetsNetNoncurrent_3F81552F643317DF3D62C8A6E85A76D3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_E02EF823BBF07614BA80C8A6E85AD9E7" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_5B84121F568B2F4D4521C8A6E858F25E" xlink:to="loc_us-gaap_Goodwill_E02EF823BBF07614BA80C8A6E85AD9E7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_D86A872093CEA5D8C40DC8A6E85A15EB" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_5B84121F568B2F4D4521C8A6E858F25E" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_D86A872093CEA5D8C40DC8A6E85A15EB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_4FC6FBD66668E09CAE84C8A6E85A10B5" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_5B84121F568B2F4D4521C8A6E858F25E" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_4FC6FBD66668E09CAE84C8A6E85A10B5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_CC4FD9DD88D213FE06F5C8A6E85C9871" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_5B84121F568B2F4D4521C8A6E858F25E" xlink:to="loc_us-gaap_Assets_CC4FD9DD88D213FE06F5C8A6E85C9871" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A2F7908E39182529693AC8A6E85C1D34" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_E9BB9BBA294414050DE4C8A6E858AF1E" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A2F7908E39182529693AC8A6E85C1D34" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_7EA0DC3CAAE04F012C4CC8A6E85CFB83" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A2F7908E39182529693AC8A6E85C1D34" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_7EA0DC3CAAE04F012C4CC8A6E85CFB83" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_B66DBD4EA35457866CBBC8A6E85C8747" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_7EA0DC3CAAE04F012C4CC8A6E85CFB83" xlink:to="loc_us-gaap_AccountsPayableCurrent_B66DBD4EA35457866CBBC8A6E85C8747" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_F0039ACB110E2BA9A9DBC8A6E85C63B1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_7EA0DC3CAAE04F012C4CC8A6E85CFB83" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_F0039ACB110E2BA9A9DBC8A6E85C63B1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_9AFED3537A63F3E9343AC8A6E85C2797" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_7EA0DC3CAAE04F012C4CC8A6E85CFB83" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_9AFED3537A63F3E9343AC8A6E85C2797" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_5112A6AF1D330C74E30EC8A6E85C3354" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_7EA0DC3CAAE04F012C4CC8A6E85CFB83" xlink:to="loc_us-gaap_AccruedIncomeTaxesCurrent_5112A6AF1D330C74E30EC8A6E85C3354" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="loc_us-gaap_DeferredRevenueCurrent_0531368AA26A95C2D805C8A6E85C8B9F" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_7EA0DC3CAAE04F012C4CC8A6E85CFB83" xlink:to="loc_us-gaap_DeferredRevenueCurrent_0531368AA26A95C2D805C8A6E85C8B9F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_4B00B6567FE048357983C8A6E85C9824" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_7EA0DC3CAAE04F012C4CC8A6E85CFB83" xlink:to="loc_us-gaap_LiabilitiesCurrent_4B00B6567FE048357983C8A6E85C9824" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredRevenueNoncurrent" xlink:label="loc_us-gaap_DeferredRevenueNoncurrent_54CCDC5CF851F27B0A33C8A6E85C4A7F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A2F7908E39182529693AC8A6E85C1D34" xlink:to="loc_us-gaap_DeferredRevenueNoncurrent_54CCDC5CF851F27B0A33C8A6E85C4A7F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccruedIncomeTaxesNoncurrent" xlink:label="loc_us-gaap_AccruedIncomeTaxesNoncurrent_E3396DCF0CA6E77E1274C8A6E85C79FA" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A2F7908E39182529693AC8A6E85C1D34" xlink:to="loc_us-gaap_AccruedIncomeTaxesNoncurrent_E3396DCF0CA6E77E1274C8A6E85C79FA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_5AB67B0E6ADD06990105C8A6E85CB4AE" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A2F7908E39182529693AC8A6E85C1D34" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_5AB67B0E6ADD06990105C8A6E85CB4AE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_0E6275997814EB0AEB3AC8A6E85C239D" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A2F7908E39182529693AC8A6E85C1D34" xlink:to="loc_us-gaap_Liabilities_0E6275997814EB0AEB3AC8A6E85C239D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_5B9B726AAF325F940C5AC8A6E85C6BE2" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A2F7908E39182529693AC8A6E85C1D34" xlink:to="loc_us-gaap_CommitmentsAndContingencies_5B9B726AAF325F940C5AC8A6E85C6BE2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_204E2595656F88D43157C8A6E85DFD4C" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A2F7908E39182529693AC8A6E85C1D34" xlink:to="loc_us-gaap_StockholdersEquityAbstract_204E2595656F88D43157C8A6E85DFD4C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_52271A6A4BEF11BCDBF8C8A6E85D4285" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_204E2595656F88D43157C8A6E85DFD4C" xlink:to="loc_us-gaap_CommonStockValue_52271A6A4BEF11BCDBF8C8A6E85D4285" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_8959F7C1140B3F18E6F0C8A6E85DAB3C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_204E2595656F88D43157C8A6E85DFD4C" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_8959F7C1140B3F18E6F0C8A6E85DAB3C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3E7CC6D12CF487A6AFC2C8A6E85D335D" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_204E2595656F88D43157C8A6E85DFD4C" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3E7CC6D12CF487A6AFC2C8A6E85D335D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_DF8A938F4575B22697FCC8A6E85D5183" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_204E2595656F88D43157C8A6E85DFD4C" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_DF8A938F4575B22697FCC8A6E85D5183" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_046316416E325809331CC8A6E85D9561" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_204E2595656F88D43157C8A6E85DFD4C" xlink:to="loc_us-gaap_StockholdersEquity_046316416E325809331CC8A6E85D9561" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_E576B443EDFC31376C86C8A6E85DC9F6" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A2F7908E39182529693AC8A6E85C1D34" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_E576B443EDFC31376C86C8A6E85DC9F6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_B18B51DF95B1CC139E5BC8A6E8291D08" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_F17A18809B1C3F390735C8A6E82902D2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_B18B51DF95B1CC139E5BC8A6E8291D08" xlink:to="loc_us-gaap_StatementTable_F17A18809B1C3F390735C8A6E82902D2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_90E14229FA10213527A8C8A6E829CDC3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_F17A18809B1C3F390735C8A6E82902D2" xlink:to="loc_us-gaap_StatementScenarioAxis_90E14229FA10213527A8C8A6E829CDC3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_E1820088F9A24514FFD6C8A6E82906B5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementScenarioAxis_90E14229FA10213527A8C8A6E829CDC3" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_E1820088F9A24514FFD6C8A6E82906B5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_2AB3B82E1D9DA7904BA7C8A6E829C8B4" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_F17A18809B1C3F390735C8A6E82902D2" xlink:to="loc_us-gaap_StatementLineItems_2AB3B82E1D9DA7904BA7C8A6E829C8B4" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_AllowanceForDoubtfulAccountsReceivableandSalesReturns" xlink:label="loc_ftnt_AllowanceForDoubtfulAccountsReceivableandSalesReturns_330C44BB95997C58E712C8A6E829ACA9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_2AB3B82E1D9DA7904BA7C8A6E829C8B4" xlink:to="loc_ftnt_AllowanceForDoubtfulAccountsReceivableandSalesReturns_330C44BB95997C58E712C8A6E829ACA9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_32D15A586E2CA8E0B4E7C8A6E82948B4" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_2AB3B82E1D9DA7904BA7C8A6E829C8B4" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_32D15A586E2CA8E0B4E7C8A6E82948B4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_F1A1812BD9617D05354EC8A6E8290108" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_2AB3B82E1D9DA7904BA7C8A6E829C8B4" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_F1A1812BD9617D05354EC8A6E8290108" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_3A648F603271E9C1F3CCC8A6E829E6D4" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_2AB3B82E1D9DA7904BA7C8A6E829C8B4" xlink:to="loc_us-gaap_CommonStockSharesIssued_3A648F603271E9C1F3CCC8A6E829E6D4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_E40E10BC982ABD2591EDC8A6E8293974" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_2AB3B82E1D9DA7904BA7C8A6E829C8B4" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_E40E10BC982ABD2591EDC8A6E8293974" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract_AB01363857198E30F276CC412644AD50" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_ABA97FD7087372C5D1CBCC412644994F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_AB01363857198E30F276CC412644AD50" xlink:to="loc_us-gaap_StatementTable_ABA97FD7087372C5D1CBCC412644994F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_71F8741435FF2E8B7FEECC412644BF41" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_ABA97FD7087372C5D1CBCC412644994F" xlink:to="loc_us-gaap_StatementScenarioAxis_71F8741435FF2E8B7FEECC412644BF41" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_AE349A04143351AFA78CCC412644EF6F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementScenarioAxis_71F8741435FF2E8B7FEECC412644BF41" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_AE349A04143351AFA78CCC412644EF6F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_3F95DA31091DDA065ED1CC412644FE0B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_ABA97FD7087372C5D1CBCC412644994F" xlink:to="loc_us-gaap_StatementLineItems_3F95DA31091DDA065ED1CC412644FE0B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_5781BC95675592FD4C88CC4126446F9D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_3F95DA31091DDA065ED1CC412644FE0B" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_5781BC95675592FD4C88CC4126446F9D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_36EB7CF7EE71039D624ACC4126451B12" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_5781BC95675592FD4C88CC4126446F9D" xlink:to="loc_us-gaap_NetIncomeLoss_36EB7CF7EE71039D624ACC4126451B12" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D1BC466509BF1D0D1301CC4126458841" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_5781BC95675592FD4C88CC4126446F9D" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D1BC466509BF1D0D1301CC4126458841" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_C8557ED66D84772BE1A9CC4126455DF5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D1BC466509BF1D0D1301CC4126458841" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_C8557ED66D84772BE1A9CC4126455DF5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_F8F021788EEAE4C50EA1CC412645835E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D1BC466509BF1D0D1301CC4126458841" xlink:to="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_F8F021788EEAE4C50EA1CC412645835E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_72F91D13B1FC9DAA4C18CC4126455B35" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D1BC466509BF1D0D1301CC4126458841" xlink:to="loc_us-gaap_ShareBasedCompensation_72F91D13B1FC9DAA4C18CC4126455B35" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_738F04A8C2CA18244786CC41264594EB" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D1BC466509BF1D0D1301CC4126458841" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_738F04A8C2CA18244786CC41264594EB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_3DD633DF4198EF4393E3CC412645A1DB" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D1BC466509BF1D0D1301CC4126458841" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_3DD633DF4198EF4393E3CC412645A1DB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_1F12FF8F24AD18BC09A1CC4126457C12" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_5781BC95675592FD4C88CC4126446F9D" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_1F12FF8F24AD18BC09A1CC4126457C12" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_222575CF666A4A4D1E86CC4126450F96" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_1F12FF8F24AD18BC09A1CC4126457C12" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_222575CF666A4A4D1E86CC4126450F96" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_43C6A3AF51D4419BA720CC412645EDDC" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_1F12FF8F24AD18BC09A1CC4126457C12" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_43C6A3AF51D4419BA720CC412645EDDC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredIncomeTaxes" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredIncomeTaxes_9A567F8E53DD8B218273CC412645BF25" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_1F12FF8F24AD18BC09A1CC4126457C12" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredIncomeTaxes_9A567F8E53DD8B218273CC412645BF25" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_CE1D18A1DA0326692C00CC41264536AC" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_1F12FF8F24AD18BC09A1CC4126457C12" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_CE1D18A1DA0326692C00CC41264536AC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_BDD8E8A47A6FD41D96F7CC4126456DA2" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_1F12FF8F24AD18BC09A1CC4126457C12" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_BDD8E8A47A6FD41D96F7CC4126456DA2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_50CA08EA8624AD3B4DDFCC412645B06A" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_1F12FF8F24AD18BC09A1CC4126457C12" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_50CA08EA8624AD3B4DDFCC412645B06A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_8D00C60F1EC8704C8A41CC4126469BD0" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_1F12FF8F24AD18BC09A1CC4126457C12" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_8D00C60F1EC8704C8A41CC4126469BD0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_BE17EB845CCEC5B1FE74CC412646BB51" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_1F12FF8F24AD18BC09A1CC4126457C12" xlink:to="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_BE17EB845CCEC5B1FE74CC412646BB51" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_B000F03BAB35E62AA15ACC412646CECF" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_1F12FF8F24AD18BC09A1CC4126457C12" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_B000F03BAB35E62AA15ACC412646CECF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_BF864DB07D3D1A54169BCC412646A5D5" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_1F12FF8F24AD18BC09A1CC4126457C12" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_BF864DB07D3D1A54169BCC412646A5D5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_26A6933245438E70ED9CCC412646BB95" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_1F12FF8F24AD18BC09A1CC4126457C12" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_26A6933245438E70ED9CCC412646BB95" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_F93DF53BA346A2927695CC4126466AE6" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_5781BC95675592FD4C88CC4126446F9D" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_F93DF53BA346A2927695CC4126466AE6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8A7073F9B1693ED00DC2CC41264646D8" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_3F95DA31091DDA065ED1CC412644FE0B" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8A7073F9B1693ED00DC2CC41264646D8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquireInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireInvestments_9D331F0982BF4D4B01F7CC4126465F50" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8A7073F9B1693ED00DC2CC41264646D8" xlink:to="loc_us-gaap_PaymentsToAcquireInvestments_9D331F0982BF4D4B01F7CC4126465F50" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_9BCB45A234ED6AAD4232CC41264614AE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8A7073F9B1693ED00DC2CC41264646D8" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_9BCB45A234ED6AAD4232CC41264614AE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_31F71F1C1412E3477F9ACC41264675B3" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8A7073F9B1693ED00DC2CC41264646D8" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_31F71F1C1412E3477F9ACC41264675B3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquireProductiveAssets" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_A7F7546EA4137A346D02CC4126467D97" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8A7073F9B1693ED00DC2CC41264646D8" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_A7F7546EA4137A346D02CC4126467D97" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_6556FA2BE8A302098902CC412646EFAD" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8A7073F9B1693ED00DC2CC41264646D8" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_6556FA2BE8A302098902CC412646EFAD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0E1F929255656BB19224CC412646C641" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8A7073F9B1693ED00DC2CC41264646D8" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0E1F929255656BB19224CC412646C641" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_88D3BEF43ED58BD39144CC412646A93D" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_3F95DA31091DDA065ED1CC412644FE0B" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_88D3BEF43ED58BD39144CC412646A93D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_1C464873287039073BEACC4126469530" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_88D3BEF43ED58BD39144CC412646A93D" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_1C464873287039073BEACC4126469530" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_4E94FA6511C84B004660CC4126462882" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_88D3BEF43ED58BD39144CC412646A93D" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_4E94FA6511C84B004660CC4126462882" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_EAA00D4CE6932D762051CC4126478098" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_88D3BEF43ED58BD39144CC412646A93D" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_EAA00D4CE6932D762051CC4126478098" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_D57873C7FE321D41ED03CC4126472560" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_88D3BEF43ED58BD39144CC412646A93D" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_D57873C7FE321D41ED03CC4126472560" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_B890D7B055ADC57F4D72CC412647E63C" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_88D3BEF43ED58BD39144CC412646A93D" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_B890D7B055ADC57F4D72CC412647E63C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_AA4AE2B26901762D8AE8CC412647F0BB" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_3F95DA31091DDA065ED1CC412644FE0B" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_AA4AE2B26901762D8AE8CC412647F0BB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_2B0E89390A582960B198CC41264793E4" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_3F95DA31091DDA065ED1CC412644FE0B" xlink:to="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_2B0E89390A582960B198CC41264793E4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_6937842F312F58B2BC9ACC412647D22D" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_3F95DA31091DDA065ED1CC412644FE0B" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_6937842F312F58B2BC9ACC412647D22D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_34DC2A955D5A0B8436EBCC412647BCC9" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_3F95DA31091DDA065ED1CC412644FE0B" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_34DC2A955D5A0B8436EBCC412647BCC9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_E8B15A46E273EFDAF36FCC412647870A" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_3F95DA31091DDA065ED1CC412644FE0B" xlink:to="loc_us-gaap_SupplementalCashFlowInformationAbstract_E8B15A46E273EFDAF36FCC412647870A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_AF1F493063C25DF32C9FCC4126475F91" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_E8B15A46E273EFDAF36FCC412647870A" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_AF1F493063C25DF32C9FCC4126475F91" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_5D100AFCF4AB840B782ECC412647FC83" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_3F95DA31091DDA065ED1CC412644FE0B" xlink:to="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_5D100AFCF4AB840B782ECC412647FC83" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_6137DE1659AD9BD0F55FCC412647479F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_5D100AFCF4AB840B782ECC412647FC83" xlink:to="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_6137DE1659AD9BD0F55FCC412647479F" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_BusinessAcquisitionContingentLiabilityIncurredinConnectionwithAcquisition" xlink:label="loc_ftnt_BusinessAcquisitionContingentLiabilityIncurredinConnectionwithAcquisition_42E9798A566578C9B7DBCC41264762E3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_5D100AFCF4AB840B782ECC412647FC83" xlink:to="loc_ftnt_BusinessAcquisitionContingentLiabilityIncurredinConnectionwithAcquisition_42E9798A566578C9B7DBCC41264762E3" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_LiabilityIncurredforRepurchaseofCommonStock" xlink:label="loc_ftnt_LiabilityIncurredforRepurchaseofCommonStock_D2637C1894E86100BE1ECC4126474C67" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_5D100AFCF4AB840B782ECC412647FC83" xlink:to="loc_ftnt_LiabilityIncurredforRepurchaseofCommonStock_D2637C1894E86100BE1ECC4126474C67" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended">
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ConsolidatedStatementsOfComprehensiveIncomeAbstract" xlink:label="loc_ftnt_ConsolidatedStatementsOfComprehensiveIncomeAbstract_03E727DD52FFD9B0FC27CC4126549BAC" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_20E6E01DF79BBBB44B0CCC412654036A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_ConsolidatedStatementsOfComprehensiveIncomeAbstract_03E727DD52FFD9B0FC27CC4126549BAC" xlink:to="loc_us-gaap_StatementTable_20E6E01DF79BBBB44B0CCC412654036A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_1B3F8EA70AE7759C4716CC41265415F3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_20E6E01DF79BBBB44B0CCC412654036A" xlink:to="loc_us-gaap_StatementScenarioAxis_1B3F8EA70AE7759C4716CC41265415F3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_EF9AF197FEF0FD9B1515CC412654DC93" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementScenarioAxis_1B3F8EA70AE7759C4716CC41265415F3" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_EF9AF197FEF0FD9B1515CC412654DC93" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_377ABF328A3542E9CEACCC41265418C1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_20E6E01DF79BBBB44B0CCC412654036A" xlink:to="loc_us-gaap_StatementLineItems_377ABF328A3542E9CEACCC41265418C1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_D3A18C722AA72A05C8C7CC412654D779" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_377ABF328A3542E9CEACCC41265418C1" xlink:to="loc_us-gaap_NetIncomeLoss_D3A18C722AA72A05C8C7CC412654D779" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParentAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParentAbstract_92059094C1B733DBE90DCC412654DC37" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_377ABF328A3542E9CEACCC41265418C1" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParentAbstract_92059094C1B733DBE90DCC412654DC37" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent_EC4804D13BA2EBE7569DCC4126545610" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParentAbstract_92059094C1B733DBE90DCC412654DC37" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent_EC4804D13BA2EBE7569DCC4126545610" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_BD95CD04E6AB7A421648CC4126544F73" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParentAbstract_92059094C1B733DBE90DCC412654DC37" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_BD95CD04E6AB7A421648CC4126544F73" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_A083203DC0528A342CE3CC412654CFBC" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParentAbstract_92059094C1B733DBE90DCC412654DC37" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_A083203DC0528A342CE3CC412654CFBC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_43B4C038A907ACBFFE34CC4126544B24" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParentAbstract_92059094C1B733DBE90DCC412654DC37" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_43B4C038A907ACBFFE34CC4126544B24" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_E86CA2629AFC59E1C915CC412655DB05" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_377ABF328A3542E9CEACCC41265418C1" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_E86CA2629AFC59E1C915CC412655DB05" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/ConsolidatedStatementsOfOperations" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract_9B8625B213C28EC9CA66604B2EFA9FA1" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_A0BC6D36208F859967E6604B2EFADD4E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_9B8625B213C28EC9CA66604B2EFA9FA1" xlink:to="loc_us-gaap_StatementTable_A0BC6D36208F859967E6604B2EFADD4E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_79846E6B61C9D7D1D81A604B2EFAD8AD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_A0BC6D36208F859967E6604B2EFADD4E" xlink:to="loc_us-gaap_StatementScenarioAxis_79846E6B61C9D7D1D81A604B2EFAD8AD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_2C9469DFE303D2EAC9A8604B2EFB1A8A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementScenarioAxis_79846E6B61C9D7D1D81A604B2EFAD8AD" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_2C9469DFE303D2EAC9A8604B2EFB1A8A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_91456448D98D5BC91CF7604B2EFBD9B5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_A0BC6D36208F859967E6604B2EFADD4E" xlink:to="loc_us-gaap_StatementLineItems_91456448D98D5BC91CF7604B2EFBD9B5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SalesRevenueNetAbstract" xlink:label="loc_us-gaap_SalesRevenueNetAbstract_D2F13999B8C65C562CC8604B2EFB76EF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_91456448D98D5BC91CF7604B2EFBD9B5" xlink:to="loc_us-gaap_SalesRevenueNetAbstract_D2F13999B8C65C562CC8604B2EFB76EF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SalesRevenueGoodsNet" xlink:label="loc_us-gaap_SalesRevenueGoodsNet_51B2A13B843C0653F43D604B2EFB9319" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SalesRevenueNetAbstract_D2F13999B8C65C562CC8604B2EFB76EF" xlink:to="loc_us-gaap_SalesRevenueGoodsNet_51B2A13B843C0653F43D604B2EFB9319" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SalesRevenueServicesNet" xlink:label="loc_us-gaap_SalesRevenueServicesNet_261B948D9549A5F7B8C4604B2EFB7E95" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SalesRevenueNetAbstract_D2F13999B8C65C562CC8604B2EFB76EF" xlink:to="loc_us-gaap_SalesRevenueServicesNet_261B948D9549A5F7B8C4604B2EFB7E95" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_F015D202C7D2E546611E604B2EFBD011" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SalesRevenueNetAbstract_D2F13999B8C65C562CC8604B2EFB76EF" xlink:to="loc_us-gaap_SalesRevenueNet_F015D202C7D2E546611E604B2EFBD011" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CostOfGoodsAndServicesSoldAbstract" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_86C99FFDC6335948E827604B2EFB64AE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_91456448D98D5BC91CF7604B2EFBD9B5" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_86C99FFDC6335948E827604B2EFB64AE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CostOfGoodsSold" xlink:label="loc_us-gaap_CostOfGoodsSold_D336F478F76534297F26604B2EFB1D27" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_86C99FFDC6335948E827604B2EFB64AE" xlink:to="loc_us-gaap_CostOfGoodsSold_D336F478F76534297F26604B2EFB1D27" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CostOfServices" xlink:label="loc_us-gaap_CostOfServices_C3EE28E0025762DC447D604B2EFB3618" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_86C99FFDC6335948E827604B2EFB64AE" xlink:to="loc_us-gaap_CostOfServices_C3EE28E0025762DC447D604B2EFB3618" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_7CB5EEBB633B332EF480604B2EFB84BD" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_86C99FFDC6335948E827604B2EFB64AE" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_7CB5EEBB633B332EF480604B2EFB84BD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GrossProfitAbstract" xlink:label="loc_us-gaap_GrossProfitAbstract_029F71D2847167D80ACB604B2EFBCB38" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_91456448D98D5BC91CF7604B2EFBD9B5" xlink:to="loc_us-gaap_GrossProfitAbstract_029F71D2847167D80ACB604B2EFBCB38" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ProductGrossProfit" xlink:label="loc_ftnt_ProductGrossProfit_9B97307FBBD21264E5C2604B2EFB4B38" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GrossProfitAbstract_029F71D2847167D80ACB604B2EFBCB38" xlink:to="loc_ftnt_ProductGrossProfit_9B97307FBBD21264E5C2604B2EFB4B38" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ServicesGrossProfit" xlink:label="loc_ftnt_ServicesGrossProfit_E6D30E9206CF4AEB53C1604B2EFB4421" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GrossProfitAbstract_029F71D2847167D80ACB604B2EFBCB38" xlink:to="loc_ftnt_ServicesGrossProfit_E6D30E9206CF4AEB53C1604B2EFB4421" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_3A75F6DEC8E30B7F0BC9604B2EFCE642" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GrossProfitAbstract_029F71D2847167D80ACB604B2EFBCB38" xlink:to="loc_us-gaap_GrossProfit_3A75F6DEC8E30B7F0BC9604B2EFCE642" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="loc_us-gaap_OperatingExpensesAbstract_9B1BFA9CFCE779E590A5604B2EFC68D1" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_91456448D98D5BC91CF7604B2EFBD9B5" xlink:to="loc_us-gaap_OperatingExpensesAbstract_9B1BFA9CFCE779E590A5604B2EFC68D1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_0AB36C15607838AB1EBC604B2EFCC659" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_9B1BFA9CFCE779E590A5604B2EFC68D1" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_0AB36C15607838AB1EBC604B2EFCC659" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="loc_us-gaap_SellingAndMarketingExpense_82FBC16AF0EEA1D24A5D604B2EFCA97B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_9B1BFA9CFCE779E590A5604B2EFC68D1" xlink:to="loc_us-gaap_SellingAndMarketingExpense_82FBC16AF0EEA1D24A5D604B2EFCA97B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_65B78D2C904A763E854C604B2EFC279C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_9B1BFA9CFCE779E590A5604B2EFC68D1" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_65B78D2C904A763E854C604B2EFC279C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_5BAE352CCE4007145E0E604B2EFC70DA" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_9B1BFA9CFCE779E590A5604B2EFC68D1" xlink:to="loc_us-gaap_OperatingExpenses_5BAE352CCE4007145E0E604B2EFC70DA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_A9FC5E5134BE36974FB9604B2EFCAE6D" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_91456448D98D5BC91CF7604B2EFBD9B5" xlink:to="loc_us-gaap_OperatingIncomeLoss_A9FC5E5134BE36974FB9604B2EFCAE6D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InvestmentIncomeNet" xlink:label="loc_us-gaap_InvestmentIncomeNet_AF8F4173774B22728D0D604B2EFCD04A" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_91456448D98D5BC91CF7604B2EFBD9B5" xlink:to="loc_us-gaap_InvestmentIncomeNet_AF8F4173774B22728D0D604B2EFCD04A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_3FBE1224E1BE67B3F08F604B2EFCB4D9" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_91456448D98D5BC91CF7604B2EFBD9B5" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_3FBE1224E1BE67B3F08F604B2EFCB4D9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_7A8B14CD1808561E486D604B2EFC2D28" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_91456448D98D5BC91CF7604B2EFBD9B5" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_7A8B14CD1808561E486D604B2EFC2D28" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_2050065FAFAE9E874FBB604B2EFC1F96" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_91456448D98D5BC91CF7604B2EFBD9B5" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_2050065FAFAE9E874FBB604B2EFC1F96" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_A512F5272318EE8F9B9B604B2EFC45A9" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_91456448D98D5BC91CF7604B2EFBD9B5" xlink:to="loc_us-gaap_NetIncomeLoss_A512F5272318EE8F9B9B604B2EFC45A9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_8E9F76474F4778E1338D604B2EFC8755" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_91456448D98D5BC91CF7604B2EFBD9B5" xlink:to="loc_us-gaap_EarningsPerShareAbstract_8E9F76474F4778E1338D604B2EFC8755" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_22C0FA3D1CDA3B43B90C604B2EFCA783" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_8E9F76474F4778E1338D604B2EFC8755" xlink:to="loc_us-gaap_EarningsPerShareBasic_22C0FA3D1CDA3B43B90C604B2EFCA783" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_4DD56A9E4B7529E4481E604B2EFC8464" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_8E9F76474F4778E1338D604B2EFC8755" xlink:to="loc_us-gaap_EarningsPerShareDiluted_4DD56A9E4B7529E4481E604B2EFC8464" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_C164BAB5D67632025B09604B2EFCF4A8" xlink:type="locator" />
    <presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_91456448D98D5BC91CF7604B2EFBD9B5" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_C164BAB5D67632025B09604B2EFCF4A8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_12912BBD73D5E134ADE3604B2EFDE92C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_C164BAB5D67632025B09604B2EFCF4A8" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_12912BBD73D5E134ADE3604B2EFDE92C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_1F90DE43AB1FF0AE8D2A604B2EFDE82A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_C164BAB5D67632025B09604B2EFCF4A8" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_1F90DE43AB1FF0AE8D2A604B2EFDE82A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="loc_us-gaap_StatementOfStockholdersEquityAbstract_1CB35AC2A039BC0A85CBCC41264E4002" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_4C3398F8D843FD22CE72CC41264EE5D5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfStockholdersEquityAbstract_1CB35AC2A039BC0A85CBCC41264E4002" xlink:to="loc_us-gaap_StatementTable_4C3398F8D843FD22CE72CC41264EE5D5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_856AF896456D7D0F138ECC41264E752D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_4C3398F8D843FD22CE72CC41264EE5D5" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_856AF896456D7D0F138ECC41264E752D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_19DC474890EFEDED04A4CC41264EB80C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_856AF896456D7D0F138ECC41264E752D" xlink:to="loc_us-gaap_EquityComponentDomain_19DC474890EFEDED04A4CC41264EB80C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_4849974F9CF71B8DD4DDCC41264E8554" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_19DC474890EFEDED04A4CC41264EB80C" xlink:to="loc_us-gaap_CommonStockMember_4849974F9CF71B8DD4DDCC41264E8554" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="loc_us-gaap_TreasuryStockMember_833F9BA00DDDC2E346CCCC41264EBD75" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_19DC474890EFEDED04A4CC41264EB80C" xlink:to="loc_us-gaap_TreasuryStockMember_833F9BA00DDDC2E346CCCC41264EBD75" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_DA095746035DC86F75EDCC41264EE3E4" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_19DC474890EFEDED04A4CC41264EB80C" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_DA095746035DC86F75EDCC41264EE3E4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_7E85607EFB2AE7DF3B68CC41264EEFF1" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_19DC474890EFEDED04A4CC41264EB80C" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_7E85607EFB2AE7DF3B68CC41264EEFF1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_D286D3B3984D2B668A38CC41264E3877" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_19DC474890EFEDED04A4CC41264EB80C" xlink:to="loc_us-gaap_RetainedEarningsMember_D286D3B3984D2B668A38CC41264E3877" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_EEE869BE74EC84A14825CC41264F1BC6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_4C3398F8D843FD22CE72CC41264EE5D5" xlink:to="loc_us-gaap_StatementLineItems_EEE869BE74EC84A14825CC41264F1BC6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_EEE869BE74EC84A14825CC41264F1BC6" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharesIssued" xlink:label="loc_us-gaap_SharesIssued_2D683EA34D105A88B76CCC41264F7F18" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_SharesIssued_2D683EA34D105A88B76CCC41264F7F18" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_A57226DFD6D97F5089E7CC41264F0576" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_StockholdersEquity_A57226DFD6D97F5089E7CC41264F0576" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_92480F704993FB3D0AE0CC41264F3400" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_92480F704993FB3D0AE0CC41264F3400" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_4BD7AA1D3CA0F112B982CC41264F447E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_4BD7AA1D3CA0F112B982CC41264F447E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_77183EC46AD2BE107CE5CC41264F7403" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_77183EC46AD2BE107CE5CC41264F7403" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_D373161FC1066E306549CC41264F5B99" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_D373161FC1066E306549CC41264F5B99" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_F1B88E284E3EA3C45AE9CC41264FAE91" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_F1B88E284E3EA3C45AE9CC41264FAE91" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross_55138FB22E323A3FA49FCC41264F13C1" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross_55138FB22E323A3FA49FCC41264F13C1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_9D91836A2753AEFD04A4CC41264F90C6" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_9D91836A2753AEFD04A4CC41264F90C6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_C32CBEDDCC6E936F7C36CC41264F407B" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_C32CBEDDCC6E936F7C36CC41264F407B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_FF51F18398604BA000D5CC41264FE3CB" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_FF51F18398604BA000D5CC41264FE3CB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_8F54254D8B651C581249CC41264FE20A" xlink:type="locator" />
    <presentationArc order="12" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_8F54254D8B651C581249CC41264FE20A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_905F46622B1E6F803AAECC412650A897" xlink:type="locator" />
    <presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_905F46622B1E6F803AAECC412650A897" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_595798E6C1839A4C83A9CC4126509279" xlink:type="locator" />
    <presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_595798E6C1839A4C83A9CC4126509279" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_40E9841D3C0830FBDA24CC412650BD59" xlink:type="locator" />
    <presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_40E9841D3C0830FBDA24CC412650BD59" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_BAB417C9BBA3555B84DACC4126504813" xlink:type="locator" />
    <presentationArc order="16" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_BAB417C9BBA3555B84DACC4126504813" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_09CEB2B3D4F131142C9FCC41265001DD" xlink:type="locator" />
    <presentationArc order="17" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_NetIncomeLoss_09CEB2B3D4F131142C9FCC41265001DD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharesIssued" xlink:label="loc_us-gaap_SharesIssued_A9AA09AFC5531105D3C3CC412650F1B3" xlink:type="locator" />
    <presentationArc order="18" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_SharesIssued_A9AA09AFC5531105D3C3CC412650F1B3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_0FD12412E05B18E8D712CC4126500693" xlink:type="locator" />
    <presentationArc order="19" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_7DF960870F6031E0259BCC41264F6EC9" xlink:to="loc_us-gaap_StockholdersEquity_0FD12412E05B18E8D712CC4126500693" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/DeferredRevenue" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredRevenueDisclosureAbstract" xlink:label="loc_us-gaap_DeferredRevenueDisclosureAbstract_8790FD512845CD625414BBCCC49D8583" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredRevenueDisclosureTextBlock" xlink:label="loc_us-gaap_DeferredRevenueDisclosureTextBlock_BC5DAD854911A35FA101BBCCC49D182B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredRevenueDisclosureAbstract_8790FD512845CD625414BBCCC49D8583" xlink:to="loc_us-gaap_DeferredRevenueDisclosureTextBlock_BC5DAD854911A35FA101BBCCC49D182B" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/DeferredRevenueDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredRevenueDisclosureAbstract" xlink:label="loc_us-gaap_DeferredRevenueDisclosureAbstract_B6A8128D8786256599B760A3452AE7AF" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredRevenueArrangementByTypeTable" xlink:label="loc_us-gaap_DeferredRevenueArrangementByTypeTable_C0B0E34B38F8483DD9CE60A3452A60C2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredRevenueDisclosureAbstract_B6A8128D8786256599B760A3452AE7AF" xlink:to="loc_us-gaap_DeferredRevenueArrangementByTypeTable_C0B0E34B38F8483DD9CE60A3452A60C2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_8E0398A4141362397C5F60A3452A0DF8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredRevenueArrangementByTypeTable_C0B0E34B38F8483DD9CE60A3452A60C2" xlink:to="loc_us-gaap_ProductOrServiceAxis_8E0398A4141362397C5F60A3452A0DF8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_5F1871B2D3C2101DBAE960A3452A80E0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductOrServiceAxis_8E0398A4141362397C5F60A3452A0DF8" xlink:to="loc_us-gaap_ProductsAndServicesDomain_5F1871B2D3C2101DBAE960A3452A80E0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProductMember" xlink:label="loc_us-gaap_ProductMember_9ECDF495BE2F6085B14260A3452A185F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_5F1871B2D3C2101DBAE960A3452A80E0" xlink:to="loc_us-gaap_ProductMember_9ECDF495BE2F6085B14260A3452A185F" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ServicesMember" xlink:label="loc_ftnt_ServicesMember_23C5240EC9FD53FCBDE360A3452AC8D6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_5F1871B2D3C2101DBAE960A3452A80E0" xlink:to="loc_ftnt_ServicesMember_23C5240EC9FD53FCBDE360A3452AC8D6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredRevenueArrangementLineItems" xlink:label="loc_us-gaap_DeferredRevenueArrangementLineItems_8CDE6EB731B1808207E060A3452AA72D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredRevenueArrangementByTypeTable_C0B0E34B38F8483DD9CE60A3452A60C2" xlink:to="loc_us-gaap_DeferredRevenueArrangementLineItems_8CDE6EB731B1808207E060A3452AA72D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="loc_us-gaap_DeferredRevenueCurrent_9A8CA56174E2B96AAE5960A3452AB01A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredRevenueArrangementLineItems_8CDE6EB731B1808207E060A3452AA72D" xlink:to="loc_us-gaap_DeferredRevenueCurrent_9A8CA56174E2B96AAE5960A3452AB01A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredRevenueNoncurrent" xlink:label="loc_us-gaap_DeferredRevenueNoncurrent_00B1277DB6469B7817BB60A3452B0469" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredRevenueArrangementLineItems_8CDE6EB731B1808207E060A3452AA72D" xlink:to="loc_us-gaap_DeferredRevenueNoncurrent_00B1277DB6469B7817BB60A3452B0469" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredRevenue" xlink:label="loc_us-gaap_DeferredRevenue_08B0C331C2897CDBBFC660A3452B6629" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredRevenueArrangementLineItems_8CDE6EB731B1808207E060A3452AA72D" xlink:to="loc_us-gaap_DeferredRevenue_08B0C331C2897CDBBFC660A3452B6629" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/DeferredRevenueTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredRevenueDisclosureAbstract" xlink:label="loc_us-gaap_DeferredRevenueDisclosureAbstract_CCEA5865F0E6862EC4BFBBCCC3C5D83E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredRevenueByArrangementDisclosureTextBlock" xlink:label="loc_us-gaap_DeferredRevenueByArrangementDisclosureTextBlock_3E533252C762FE01948BBBCCC3C5D67E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredRevenueDisclosureAbstract_CCEA5865F0E6862EC4BFBBCCC3C5D83E" xlink:to="loc_us-gaap_DeferredRevenueByArrangementDisclosureTextBlock_3E533252C762FE01948BBBCCC3C5D67E" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/DefinedContributionPlans" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CompensationAndRetirementDisclosureAbstract" xlink:label="loc_us-gaap_CompensationAndRetirementDisclosureAbstract_00431D2D7301630C5A2260D194A19D0F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CompensationAndEmployeeBenefitPlansTextBlock" xlink:label="loc_us-gaap_CompensationAndEmployeeBenefitPlansTextBlock_5328B14FBE783F822AEE60CF7A20BB4F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CompensationAndRetirementDisclosureAbstract_00431D2D7301630C5A2260D194A19D0F" xlink:to="loc_us-gaap_CompensationAndEmployeeBenefitPlansTextBlock_5328B14FBE783F822AEE60CF7A20BB4F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/DefinedContributionPlansDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CompensationAndRetirementDisclosureAbstract" xlink:label="loc_us-gaap_CompensationAndRetirementDisclosureAbstract_1D18DCF3BCFD5AC1322160D77452F74F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent" xlink:label="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_49056E704D0311D751E560D77453E2C8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CompensationAndRetirementDisclosureAbstract_1D18DCF3BCFD5AC1322160D77452F74F" xlink:to="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_49056E704D0311D751E560D77453E2C8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent" xlink:label="loc_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_F18FCDF321E5A372699260D774547969" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CompensationAndRetirementDisclosureAbstract_1D18DCF3BCFD5AC1322160D77452F74F" xlink:to="loc_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_F18FCDF321E5A372699260D774547969" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_DefinedContributionPlanEmployerMatchingContributionAmount" xlink:label="loc_ftnt_DefinedContributionPlanEmployerMatchingContributionAmount_70F93079DEE50FC18E3060D77456DE62" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CompensationAndRetirementDisclosureAbstract_1D18DCF3BCFD5AC1322160D77452F74F" xlink:to="loc_ftnt_DefinedContributionPlanEmployerMatchingContributionAmount_70F93079DEE50FC18E3060D77456DE62" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/DocumentAndEntityInformation" xlink:type="extended">
    <loc xlink:href="ftnt-20141231.xsd#ftnt_DeiAbstract" xlink:label="loc_ftnt_DeiAbstract_13B9EC35272A5243A4ADBBCCC4222341" xlink:type="locator" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentInformationTable" xlink:label="loc_dei_DocumentInformationTable_0D6882F04D2332FAC345BBCCC427D01D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_DeiAbstract_13B9EC35272A5243A4ADBBCCC4222341" xlink:to="loc_dei_DocumentInformationTable_0D6882F04D2332FAC345BBCCC427D01D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentInformationDocumentAxis" xlink:label="loc_dei_DocumentInformationDocumentAxis_F8597F98A94945B68D00BBCCC4275079" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationTable_0D6882F04D2332FAC345BBCCC427D01D" xlink:to="loc_dei_DocumentInformationDocumentAxis_F8597F98A94945B68D00BBCCC4275079" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentDomain" xlink:label="loc_dei_DocumentDomain_A6A881A8A0023FC03B26BBCCC427680A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationDocumentAxis_F8597F98A94945B68D00BBCCC4275079" xlink:to="loc_dei_DocumentDomain_A6A881A8A0023FC03B26BBCCC427680A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentInformationLineItems" xlink:label="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationTable_0D6882F04D2332FAC345BBCCC427D01D" xlink:to="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_D354A14E98A4618A172EBBCCC429B4A0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:to="loc_dei_EntityRegistrantName_D354A14E98A4618A172EBBCCC429B4A0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_2BD8F80D77AB6D8C1D37BBCCC429B1D7" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:to="loc_dei_EntityCentralIndexKey_2BD8F80D77AB6D8C1D37BBCCC429B1D7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_F80D16952D650B280736BBCCC4295A3B" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:to="loc_dei_DocumentType_F80D16952D650B280736BBCCC4295A3B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_8A4AFC7125DA2FE930B4BBCCC4291AC5" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:to="loc_dei_DocumentPeriodEndDate_8A4AFC7125DA2FE930B4BBCCC4291AC5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_14E2AB91F38696C8B3F3BBCCC429A2DD" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:to="loc_dei_AmendmentFlag_14E2AB91F38696C8B3F3BBCCC429A2DD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_1F430AFFAECAB02F3D3BBBCCC429D54C" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:to="loc_dei_DocumentFiscalYearFocus_1F430AFFAECAB02F3D3BBBCCC429D54C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_5D6F55F217D9CA40F91CBBCCC4299916" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:to="loc_dei_DocumentFiscalPeriodFocus_5D6F55F217D9CA40F91CBBCCC4299916" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_08D59AA4F19992DB61A3BBCCC429530A" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:to="loc_dei_CurrentFiscalYearEndDate_08D59AA4F19992DB61A3BBCCC429530A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:label="loc_dei_EntityCurrentReportingStatus_20737FE5084CBC481D21BBCCC42990A1" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:to="loc_dei_EntityCurrentReportingStatus_20737FE5084CBC481D21BBCCC42990A1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_147B766F12BBFABD6D45BBCCC4296C3A" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:to="loc_dei_EntityFilerCategory_147B766F12BBFABD6D45BBCCC4296C3A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_E0B825C33588089899B8BBCCC42935FF" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:to="loc_dei_EntityWellKnownSeasonedIssuer_E0B825C33588089899B8BBCCC42935FF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityVoluntaryFilers" xlink:label="loc_dei_EntityVoluntaryFilers_B799F4A699C4129DA601BBCCC429E2E2" xlink:type="locator" />
    <presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:to="loc_dei_EntityVoluntaryFilers_B799F4A699C4129DA601BBCCC429E2E2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_D23BE367201EB1C7513ABBCCC429EDDE" xlink:type="locator" />
    <presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_D23BE367201EB1C7513ABBCCC429EDDE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityPublicFloat" xlink:label="loc_dei_EntityPublicFloat_474ABE216F869B866F88BBCCC42970C2" xlink:type="locator" />
    <presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_A32BFB74E3A1ABE380D1BBCCC4277996" xlink:to="loc_dei_EntityPublicFloat_474ABE216F869B866F88BBCCC42970C2" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/FinancialInstrumentsAndFairValue" xlink:type="extended">
    <loc xlink:href="ftnt-20141231.xsd#ftnt_FinancialInstrumentsAndFairValueAbstract" xlink:label="loc_ftnt_FinancialInstrumentsAndFairValueAbstract_85BFEB02E84A419E22F6CD3C56F1ACE8" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FinancialInstrumentsDisclosureTextBlock" xlink:label="loc_us-gaap_FinancialInstrumentsDisclosureTextBlock_3E4951B4C4115CB7A9BFCD3C56F13AD3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_FinancialInstrumentsAndFairValueAbstract_85BFEB02E84A419E22F6CD3C56F1ACE8" xlink:to="loc_us-gaap_FinancialInstrumentsDisclosureTextBlock_3E4951B4C4115CB7A9BFCD3C56F13AD3" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/FinancialInstrumentsAndFairValueAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_587FE19EF8A8F1459708CD3C56DA3460" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_7B24CD16D68848435A08CD3C56DA2E8F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_587FE19EF8A8F1459708CD3C56DA3460" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_7B24CD16D68848435A08CD3C56DA2E8F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_7A882AF850DB11D6F48ECD3C56DAB989" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_7B24CD16D68848435A08CD3C56DA2E8F" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_7A882AF850DB11D6F48ECD3C56DAB989" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9C44449C3519F5849BF2CD3C56DAC027" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_7A882AF850DB11D6F48ECD3C56DAB989" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9C44449C3519F5849BF2CD3C56DAC027" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_CoyotePointSystemsInc.Member" xlink:label="loc_ftnt_CoyotePointSystemsInc.Member_DCDB5E576AD76E1766DFCD3C56DAECAB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9C44449C3519F5849BF2CD3C56DAC027" xlink:to="loc_ftnt_CoyotePointSystemsInc.Member_DCDB5E576AD76E1766DFCD3C56DAECAB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_C9B6BEB83D76C3CF8814CD3C56DA23C4" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_7B24CD16D68848435A08CD3C56DA2E8F" xlink:to="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_C9B6BEB83D76C3CF8814CD3C56DA23C4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_53F7C07C33AD71BAB3CDCD3C56DAB828" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_C9B6BEB83D76C3CF8814CD3C56DA23C4" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_53F7C07C33AD71BAB3CDCD3C56DAB828" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure_BE24578C46799570775DCD3C56DAE691" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_C9B6BEB83D76C3CF8814CD3C56DA23C4" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure_BE24578C46799570775DCD3C56DAE691" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/FinancialInstrumentsAndFairValueChangeToContingentConsiderationLiabilityDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_EE9FD41EEF1C552D7E64CD3C56DD0026" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_33A0E68D90176004A3C9CD3C56DD14B5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_EE9FD41EEF1C552D7E64CD3C56DD0026" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_33A0E68D90176004A3C9CD3C56DD14B5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_50B9CEF40474BB0A8BD0CD3C56DD0F59" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_33A0E68D90176004A3C9CD3C56DD14B5" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_50B9CEF40474BB0A8BD0CD3C56DD0F59" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_E65D09507B3770767FB7CD3C56DD6816" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_50B9CEF40474BB0A8BD0CD3C56DD0F59" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_E65D09507B3770767FB7CD3C56DD6816" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_0EB52B882FED56ED535FCD3C56DDA12E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_E65D09507B3770767FB7CD3C56DD6816" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_0EB52B882FED56ED535FCD3C56DDA12E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_6C31B2159433A7B6D132CD3C56DD4B08" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_0EB52B882FED56ED535FCD3C56DDA12E" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_6C31B2159433A7B6D132CD3C56DD4B08" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_1E3B27959909BFE0D4B2CD3C56DE24C7" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_33A0E68D90176004A3C9CD3C56DD14B5" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_1E3B27959909BFE0D4B2CD3C56DE24C7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_C7EAF6B20C53DEF0E4B2CD3C56DE2602" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_1E3B27959909BFE0D4B2CD3C56DE24C7" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_C7EAF6B20C53DEF0E4B2CD3C56DE2602" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_A8DD01C9E159287B5E82CD3C56DEADD4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_C7EAF6B20C53DEF0E4B2CD3C56DE2602" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_A8DD01C9E159287B5E82CD3C56DEADD4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2E69F73255A65E75217FCD3C56DED2BF" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_33A0E68D90176004A3C9CD3C56DD14B5" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2E69F73255A65E75217FCD3C56DED2BF" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_MovementinContingentConsiderationLiabilityRollForward" xlink:label="loc_ftnt_MovementinContingentConsiderationLiabilityRollForward_6A9743831A8765D0362ECD3C56DE7224" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2E69F73255A65E75217FCD3C56DED2BF" xlink:to="loc_ftnt_MovementinContingentConsiderationLiabilityRollForward_6A9743831A8765D0362ECD3C56DE7224" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_0B04FDBEC091A45B897ACD3C56DE3CC7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_MovementinContingentConsiderationLiabilityRollForward_6A9743831A8765D0362ECD3C56DE7224" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_0B04FDBEC091A45B897ACD3C56DE3CC7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_85CF40D7B433F3D66C7DCD3C56DECBA0" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_MovementinContingentConsiderationLiabilityRollForward_6A9743831A8765D0362ECD3C56DE7224" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_85CF40D7B433F3D66C7DCD3C56DECBA0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_9D35E4FC164C5A12D170CD3C56DE94F8" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_MovementinContingentConsiderationLiabilityRollForward_6A9743831A8765D0362ECD3C56DE7224" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_9D35E4FC164C5A12D170CD3C56DE94F8" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/FinancialInstrumentsAndFairValueFairValueMeasurementsDetails" xlink:type="extended">
    <loc xlink:href="ftnt-20141231.xsd#ftnt_FinancialInstrumentsAndFairValueAbstract" xlink:label="loc_ftnt_FinancialInstrumentsAndFairValueAbstract_9C70190B709CCC93B38CCD3C56E31A24" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_2DAE087E6C6ED8A0C270CD3C56E3FB63" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_FinancialInstrumentsAndFairValueAbstract_9C70190B709CCC93B38CCD3C56E31A24" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_2DAE087E6C6ED8A0C270CD3C56E3FB63" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_F3C8E0B1A3E8EAAF6336CD3C56E4B9EF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_2DAE087E6C6ED8A0C270CD3C56E3FB63" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_F3C8E0B1A3E8EAAF6336CD3C56E4B9EF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_4A9361D59B71E89772ACCD3C56E441EA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_F3C8E0B1A3E8EAAF6336CD3C56E4B9EF" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_4A9361D59B71E89772ACCD3C56E441EA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_2534CBFEB13D88028034CD3C56E46609" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_4A9361D59B71E89772ACCD3C56E441EA" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_2534CBFEB13D88028034CD3C56E46609" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_A4AFC95F9C5050E3EE9BCD3C56E4468C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_2534CBFEB13D88028034CD3C56E46609" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_A4AFC95F9C5050E3EE9BCD3C56E4468C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_522F88058010B9CFE362CD3C56E4665F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_2534CBFEB13D88028034CD3C56E46609" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_522F88058010B9CFE362CD3C56E4665F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_E6AD89571D0EC395326FCD3C56E4280D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_2DAE087E6C6ED8A0C270CD3C56E3FB63" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_E6AD89571D0EC395326FCD3C56E4280D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_612A184D725144FB35BDCD3C56E40AC2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_E6AD89571D0EC395326FCD3C56E4280D" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_612A184D725144FB35BDCD3C56E40AC2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_DFC73E916B060965B119CD3C56E44FF2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_612A184D725144FB35BDCD3C56E40AC2" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_DFC73E916B060965B119CD3C56E44FF2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_9F2E78885D26DE4ED459CD3C56E4CCF9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_612A184D725144FB35BDCD3C56E40AC2" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_9F2E78885D26DE4ED459CD3C56E4CCF9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember" xlink:label="loc_us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember_6EFC8C4C9B5558BB4B1ACD3C56E4B9B8" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_612A184D725144FB35BDCD3C56E40AC2" xlink:to="loc_us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember_6EFC8C4C9B5558BB4B1ACD3C56E4B9B8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_6DB28A760020CC24DF4ACD3C56E41564" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_612A184D725144FB35BDCD3C56E40AC2" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_6DB28A760020CC24DF4ACD3C56E41564" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CertificatesOfDepositMember" xlink:label="loc_us-gaap_CertificatesOfDepositMember_B043AD5F246DAF53488BCD3C56E46A03" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_612A184D725144FB35BDCD3C56E40AC2" xlink:to="loc_us-gaap_CertificatesOfDepositMember_B043AD5F246DAF53488BCD3C56E46A03" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_MoneyMarketFundsExcludingCommercialPaperMember" xlink:label="loc_ftnt_MoneyMarketFundsExcludingCommercialPaperMember_922E889445AFCE5C6632CD3C56E42E30" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_612A184D725144FB35BDCD3C56E40AC2" xlink:to="loc_ftnt_MoneyMarketFundsExcludingCommercialPaperMember_922E889445AFCE5C6632CD3C56E42E30" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_40F765572601E2841173CD3C56E4C543" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_2DAE087E6C6ED8A0C270CD3C56E3FB63" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_40F765572601E2841173CD3C56E4C543" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_F9FAE5621566B7F5E227CD3C56E48D51" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_40F765572601E2841173CD3C56E4C543" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_F9FAE5621566B7F5E227CD3C56E48D51" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_30FC25D0F64FAD0BDA5CCD3C56E42F67" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_F9FAE5621566B7F5E227CD3C56E48D51" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_30FC25D0F64FAD0BDA5CCD3C56E42F67" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_92D18E20CBA73A466374CD3C56E5BF2B" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_2DAE087E6C6ED8A0C270CD3C56E3FB63" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_92D18E20CBA73A466374CD3C56E5BF2B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_345A0623C6CBDED398CBCD3C56E52F58" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_92D18E20CBA73A466374CD3C56E5BF2B" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_345A0623C6CBDED398CBCD3C56E52F58" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_CashEquivalentsLineItemMember" xlink:label="loc_ftnt_CashEquivalentsLineItemMember_6C5F39A396B88595F139CD3C56E5AB81" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_345A0623C6CBDED398CBCD3C56E52F58" xlink:to="loc_ftnt_CashEquivalentsLineItemMember_6C5F39A396B88595F139CD3C56E5AB81" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShortTermInvestmentsLineItemMember" xlink:label="loc_ftnt_ShortTermInvestmentsLineItemMember_E0C6CDF1C11820816C34CD3C56E55EDB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_345A0623C6CBDED398CBCD3C56E52F58" xlink:to="loc_ftnt_ShortTermInvestmentsLineItemMember_E0C6CDF1C11820816C34CD3C56E55EDB" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_LongTermInvestmentsLineItemMember" xlink:label="loc_ftnt_LongTermInvestmentsLineItemMember_41892F8067D76C0B6171CD3C56E5467F" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_345A0623C6CBDED398CBCD3C56E52F58" xlink:to="loc_ftnt_LongTermInvestmentsLineItemMember_41892F8067D76C0B6171CD3C56E5467F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_46B45403532EA9E99750CD3C56E503C2" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_2DAE087E6C6ED8A0C270CD3C56E3FB63" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_46B45403532EA9E99750CD3C56E503C2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4299178B98B5E935ED25CD3C56E5EA0C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_46B45403532EA9E99750CD3C56E503C2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4299178B98B5E935ED25CD3C56E5EA0C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_3EA23352DA9FB7DD3985CD3C56E5F96E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4299178B98B5E935ED25CD3C56E5EA0C" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_3EA23352DA9FB7DD3985CD3C56E5F96E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_68C039BED6A670BC5B92CD3C56E5B476" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4299178B98B5E935ED25CD3C56E5EA0C" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_68C039BED6A670BC5B92CD3C56E5B476" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_3778D6FAA21D3519FF3BCD3C56E5E191" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4299178B98B5E935ED25CD3C56E5EA0C" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_3778D6FAA21D3519FF3BCD3C56E5E191" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2D8414B02866F7862FC1CD3C56E5DF30" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_2DAE087E6C6ED8A0C270CD3C56E3FB63" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2D8414B02866F7862FC1CD3C56E5DF30" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_8FA28C495D73856D6E43CD3C56E553CD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2D8414B02866F7862FC1CD3C56E5DF30" xlink:to="loc_us-gaap_AvailableForSaleSecurities_8FA28C495D73856D6E43CD3C56E553CD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_ED15693E1AF76FC598ACCD3C56E5C123" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2D8414B02866F7862FC1CD3C56E5DF30" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_ED15693E1AF76FC598ACCD3C56E5C123" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_53525F00B1698E3A5383CD3C56E65807" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2D8414B02866F7862FC1CD3C56E5DF30" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_53525F00B1698E3A5383CD3C56E65807" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FinancialLiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_C4F3ABB69D15EFD2856ECD3C56E6C208" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2D8414B02866F7862FC1CD3C56E5DF30" xlink:to="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_C4F3ABB69D15EFD2856ECD3C56E6C208" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/FinancialInstrumentsAndFairValueInvestmentsDetails" xlink:type="extended">
    <loc xlink:href="ftnt-20141231.xsd#ftnt_FinancialInstrumentsAndFairValueAbstract" xlink:label="loc_ftnt_FinancialInstrumentsAndFairValueAbstract_ABAE8892E7C0B060BB6DCD3C56EBA06D" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesTable" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_C1889C6AF0CA596B13E7CD3C56EB316A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_FinancialInstrumentsAndFairValueAbstract_ABAE8892E7C0B060BB6DCD3C56EBA06D" xlink:to="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_C1889C6AF0CA596B13E7CD3C56EB316A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_708E3A7896E352782C40CD3C56EB9729" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_C1889C6AF0CA596B13E7CD3C56EB316A" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_708E3A7896E352782C40CD3C56EB9729" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5ED50A337E2F7BEF94FBCD3C56EBBCA0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_708E3A7896E352782C40CD3C56EB9729" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5ED50A337E2F7BEF94FBCD3C56EBBCA0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_8696F694647F2B55A1EBCD3C56EBBF57" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5ED50A337E2F7BEF94FBCD3C56EBBCA0" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_8696F694647F2B55A1EBCD3C56EBBF57" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_C5D4954AD0512468AE4DCD3C56EBF08C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5ED50A337E2F7BEF94FBCD3C56EBBCA0" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_C5D4954AD0512468AE4DCD3C56EBF08C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember" xlink:label="loc_us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember_BB012526FDFAB66EBF1FCD3C56EBC1DE" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5ED50A337E2F7BEF94FBCD3C56EBBCA0" xlink:to="loc_us-gaap_CommercialPaperNotIncludedWithCashAndCashEquivalentsMember_BB012526FDFAB66EBF1FCD3C56EBC1DE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_8310AB1EC9531DF686E7CD3C56ECE8C7" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5ED50A337E2F7BEF94FBCD3C56EBBCA0" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_8310AB1EC9531DF686E7CD3C56ECE8C7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CertificatesOfDepositMember" xlink:label="loc_us-gaap_CertificatesOfDepositMember_D2304C9B3852529238D7CD3C56EC4C8C" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_5ED50A337E2F7BEF94FBCD3C56EBBCA0" xlink:to="loc_us-gaap_CertificatesOfDepositMember_D2304C9B3852529238D7CD3C56EC4C8C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_7C9D3758FD539B3E935ACD3C56EC8E5A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_C1889C6AF0CA596B13E7CD3C56EB316A" xlink:to="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_7C9D3758FD539B3E935ACD3C56EC8E5A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_13817849EC035EAE7222CD3C56ECD480" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_7C9D3758FD539B3E935ACD3C56EC8E5A" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_13817849EC035EAE7222CD3C56ECD480" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_AvailableforsaleDebtSecuritiesAccumulatedGrossUnrealizedGainbeforeTax" xlink:label="loc_ftnt_AvailableforsaleDebtSecuritiesAccumulatedGrossUnrealizedGainbeforeTax_89F4C30A37363A2BA283CD3C56EC917C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_7C9D3758FD539B3E935ACD3C56EC8E5A" xlink:to="loc_ftnt_AvailableforsaleDebtSecuritiesAccumulatedGrossUnrealizedGainbeforeTax_89F4C30A37363A2BA283CD3C56EC917C" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_AvailableforsaleDebtSecuritiesAccumulatedGrossUnrealizedLossbeforeTax" xlink:label="loc_ftnt_AvailableforsaleDebtSecuritiesAccumulatedGrossUnrealizedLossbeforeTax_E0B2B5F04DB0EF35CF22CD3C56EC0052" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_7C9D3758FD539B3E935ACD3C56EC8E5A" xlink:to="loc_ftnt_AvailableforsaleDebtSecuritiesAccumulatedGrossUnrealizedLossbeforeTax_E0B2B5F04DB0EF35CF22CD3C56EC0052" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_B735B73040516F7F05D6CD3C56EC4E3E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_7C9D3758FD539B3E935ACD3C56EC8E5A" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_B735B73040516F7F05D6CD3C56EC4E3E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract_BC9CB7EFC769D76243B1CD3C56EC24DA" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_7C9D3758FD539B3E935ACD3C56EC8E5A" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract_BC9CB7EFC769D76243B1CD3C56EC24DA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_A400911D107238650E8DCD3C56ECAF7A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract_BC9CB7EFC769D76243B1CD3C56EC24DA" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_A400911D107238650E8DCD3C56ECAF7A" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessthan12MonthsAccumulatedLoss" xlink:label="loc_ftnt_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessthan12MonthsAccumulatedLoss_679C32175D4AE217960BCD3C56EC482F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract_BC9CB7EFC769D76243B1CD3C56EC24DA" xlink:to="loc_ftnt_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessthan12MonthsAccumulatedLoss_679C32175D4AE217960BCD3C56EC482F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_26F2FC8B186F86C8C9B3CD3C56EC9B94" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract_BC9CB7EFC769D76243B1CD3C56EC24DA" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_26F2FC8B186F86C8C9B3CD3C56EC9B94" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAccumulatedLoss" xlink:label="loc_ftnt_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAccumulatedLoss_60E1E69755222D6B00A7CD3C56EC47CE" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract_BC9CB7EFC769D76243B1CD3C56EC24DA" xlink:to="loc_ftnt_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAccumulatedLoss_60E1E69755222D6B00A7CD3C56EC47CE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_4D67EB82E39E95E6683BCD3C56EC09BD" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract_BC9CB7EFC769D76243B1CD3C56EC24DA" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_4D67EB82E39E95E6683BCD3C56EC09BD" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss" xlink:label="loc_ftnt_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_2BE1194348DD3BB31E24CD3C56EC0883" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract_BC9CB7EFC769D76243B1CD3C56EC24DA" xlink:to="loc_ftnt_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_2BE1194348DD3BB31E24CD3C56EC0883" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_5C401D5CC53EC2D35231CD3C56ECD4D9" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_7C9D3758FD539B3E935ACD3C56EC8E5A" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_5C401D5CC53EC2D35231CD3C56ECD4D9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_CA9B1AAF16122A554B53CD3C56ED7EAF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_5C401D5CC53EC2D35231CD3C56ECD4D9" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_CA9B1AAF16122A554B53CD3C56ED7EAF" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_AvailableForSaleSecuritiesDebtMaturitiesAfterOneYearFairValue" xlink:label="loc_ftnt_AvailableForSaleSecuritiesDebtMaturitiesAfterOneYearFairValue_C6B89E5F5234153F414ACD3C56ED4C21" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_5C401D5CC53EC2D35231CD3C56ECD4D9" xlink:to="loc_ftnt_AvailableForSaleSecuritiesDebtMaturitiesAfterOneYearFairValue_C6B89E5F5234153F414ACD3C56ED4C21" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_D96C59E70F08857CB3F5CD3C56ED14EC" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_5C401D5CC53EC2D35231CD3C56ECD4D9" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_D96C59E70F08857CB3F5CD3C56ED14EC" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/FinancialInstrumentsAndFairValueTables" xlink:type="extended">
    <loc xlink:href="ftnt-20141231.xsd#ftnt_FinancialInstrumentsAndFairValueAbstract" xlink:label="loc_ftnt_FinancialInstrumentsAndFairValueAbstract_6CC0A79816C18E273150CD3C56EF61E1" xlink:type="locator" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ScheduleOfAmortizedCostsUnrealizedGainsAndLossesAndFairValueOfAvailableForSaleSecuritiesTableTextBlock" xlink:label="loc_ftnt_ScheduleOfAmortizedCostsUnrealizedGainsAndLossesAndFairValueOfAvailableForSaleSecuritiesTableTextBlock_F70C862EFD6B52EC87E6CD3C56EFE3FA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_FinancialInstrumentsAndFairValueAbstract_6CC0A79816C18E273150CD3C56EF61E1" xlink:to="loc_ftnt_ScheduleOfAmortizedCostsUnrealizedGainsAndLossesAndFairValueOfAvailableForSaleSecuritiesTableTextBlock_F70C862EFD6B52EC87E6CD3C56EFE3FA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_C3D6A4599CAA3D373E4ECD3C56EF652D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_FinancialInstrumentsAndFairValueAbstract_6CC0A79816C18E273150CD3C56EF61E1" xlink:to="loc_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_C3D6A4599CAA3D373E4ECD3C56EF652D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock" xlink:label="loc_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_236FFCE09730E851EFABCD3C56EF1FF4" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_FinancialInstrumentsAndFairValueAbstract_6CC0A79816C18E273150CD3C56EF61E1" xlink:to="loc_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_236FFCE09730E851EFABCD3C56EF1FF4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_AE0B7B75DC47F627EE02CD3C56EF921F" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_FinancialInstrumentsAndFairValueAbstract_6CC0A79816C18E273150CD3C56EF61E1" xlink:to="loc_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_AE0B7B75DC47F627EE02CD3C56EF921F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock_B6295D3CB890C3A458CECD3C56EF480E" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_FinancialInstrumentsAndFairValueAbstract_6CC0A79816C18E273150CD3C56EF61E1" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock_B6295D3CB890C3A458CECD3C56EF480E" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/GoodwillAndOtherIntangibleAssetsNet" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_205969FC5F0D6DF05ACBBBCCC48587B6" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IntangibleAssetsDisclosureTextBlock" xlink:label="loc_us-gaap_IntangibleAssetsDisclosureTextBlock_C96F45423DF98F4C0A90BBCCC485DA7A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_205969FC5F0D6DF05ACBBBCCC48587B6" xlink:to="loc_us-gaap_IntangibleAssetsDisclosureTextBlock_C96F45423DF98F4C0A90BBCCC485DA7A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/GoodwillAndOtherIntangibleAssetsNetDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_D9F61FF8626DF9FAEE827F03E0C77174" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_9CB3A0765390886D304F7F03E0C96CCF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_D9F61FF8626DF9FAEE827F03E0C77174" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_9CB3A0765390886D304F7F03E0C96CCF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_54586D87953E23E1C0227F03E0C9750C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_9CB3A0765390886D304F7F03E0C96CCF" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_54586D87953E23E1C0227F03E0C9750C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_C19BBCF145F2EC7DEE5F7F03E0C99445" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_54586D87953E23E1C0227F03E0C9750C" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_C19BBCF145F2EC7DEE5F7F03E0C99445" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="loc_us-gaap_CostOfSalesMember_5CE3B9D1A476E82CE1AF7F03E0C99CA3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_C19BBCF145F2EC7DEE5F7F03E0C99445" xlink:to="loc_us-gaap_CostOfSalesMember_5CE3B9D1A476E82CE1AF7F03E0C99CA3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_CD56B8082839E41CEEB57F03E0C949CA" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_9CB3A0765390886D304F7F03E0C96CCF" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_CD56B8082839E41CEEB57F03E0C949CA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_A4A22BBA5CAD8D2E9BD57F03E0C98C57" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_CD56B8082839E41CEEB57F03E0C949CA" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_A4A22BBA5CAD8D2E9BD57F03E0C98C57" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_CoyotePointSystemsInc.Member" xlink:label="loc_ftnt_CoyotePointSystemsInc.Member_F0097F7B83D5F5F302037F03E0C90408" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_A4A22BBA5CAD8D2E9BD57F03E0C98C57" xlink:to="loc_ftnt_CoyotePointSystemsInc.Member_F0097F7B83D5F5F302037F03E0C90408" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_7455E3BD41F9F6DCE2267F03E0C964EF" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_9CB3A0765390886D304F7F03E0C96CCF" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_7455E3BD41F9F6DCE2267F03E0C964EF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_41B484C6DE5177314CC97F03E0CA4E77" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_7455E3BD41F9F6DCE2267F03E0C964EF" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_41B484C6DE5177314CC97F03E0CA4E77" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_2769BE0BE0AC5E5FD4817F03E0CA005E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_41B484C6DE5177314CC97F03E0CA4E77" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_2769BE0BE0AC5E5FD4817F03E0CA005E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="loc_us-gaap_CustomerRelationshipsMember_4D5A00E5EF4FCBE3BC277F03E0CA973D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_41B484C6DE5177314CC97F03E0CA4E77" xlink:to="loc_us-gaap_CustomerRelationshipsMember_4D5A00E5EF4FCBE3BC277F03E0CA973D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_0AC8EFD8542E571044A67F03E0CA6955" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_9CB3A0765390886D304F7F03E0C96CCF" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_0AC8EFD8542E571044A67F03E0CA6955" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_8658BAF90483058AFC0D7F03E0CA2068" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_0AC8EFD8542E571044A67F03E0CA6955" xlink:to="loc_us-gaap_Goodwill_8658BAF90483058AFC0D7F03E0CA2068" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_992F6B48C5F6EBD33A167F03E0CA50B8" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_0AC8EFD8542E571044A67F03E0CA6955" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_992F6B48C5F6EBD33A167F03E0CA50B8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_C68A2D4CB8FCDED2DD447F03E0CA19D5" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_0AC8EFD8542E571044A67F03E0CA6955" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_C68A2D4CB8FCDED2DD447F03E0CA19D5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_D1C6E3EC2D9DE442B39C7F03E0CA0007" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_C68A2D4CB8FCDED2DD447F03E0CA19D5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_D1C6E3EC2D9DE442B39C7F03E0CA0007" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_90151A3DD7C87970571E7F03E0CA1AD0" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_C68A2D4CB8FCDED2DD447F03E0CA19D5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_90151A3DD7C87970571E7F03E0CA1AD0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_C73D465ED28B30B1126D7F03E0CA6566" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_C68A2D4CB8FCDED2DD447F03E0CA19D5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_C73D465ED28B30B1126D7F03E0CA6566" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_F5E9FF125B9F663591C47F03E0CA250E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_0AC8EFD8542E571044A67F03E0CA6955" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_F5E9FF125B9F663591C47F03E0CA250E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_914FD504A192A86932EA7F03E0CAA38F" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_0AC8EFD8542E571044A67F03E0CA6955" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_914FD504A192A86932EA7F03E0CAA38F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure_CE7C88C8F4D02196820F7F03E0CA7FC6" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_0AC8EFD8542E571044A67F03E0CA6955" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure_CE7C88C8F4D02196820F7F03E0CA7FC6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/GoodwillAndOtherIntangibleAssetsNetEstimatedFutureAmortizationExpenseDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_64CA60B990C53511924A7F03E208A91E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_86FAC0888CED7D3409FB7F03E20A004A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_64CA60B990C53511924A7F03E208A91E" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_86FAC0888CED7D3409FB7F03E20A004A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_B17DB5D839F1F73479757F03E20A380F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_86FAC0888CED7D3409FB7F03E20A004A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_B17DB5D839F1F73479757F03E20A380F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_846861CD8840CF11DADE7F03E20AD4D7" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_86FAC0888CED7D3409FB7F03E20A004A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_846861CD8840CF11DADE7F03E20AD4D7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_0D6AD6DD4E828528022E7F03E20AED0A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_86FAC0888CED7D3409FB7F03E20A004A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_0D6AD6DD4E828528022E7F03E20AED0A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_93D1FDE84307B469B8247F03E20A50CB" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_86FAC0888CED7D3409FB7F03E20A004A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_93D1FDE84307B469B8247F03E20A50CB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_52517CFC581D6908D45C7F03E20ADB0A" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_86FAC0888CED7D3409FB7F03E20A004A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_52517CFC581D6908D45C7F03E20ADB0A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_33325F4C466150A178BC7F03E20AF441" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_86FAC0888CED7D3409FB7F03E20A004A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_33325F4C466150A178BC7F03E20AF441" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/GoodwillAndOtherIntangibleAssetsNetTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_3B29497A5515B9E2EFDABBCCC4D7FE39" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_C279434BF4F71DE6E287BBCCC4D74844" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_3B29497A5515B9E2EFDABBCCC4D7FE39" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_C279434BF4F71DE6E287BBCCC4D74844" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" xlink:label="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_BBE97CCE30A95A8D74C4BBCCC4D72E40" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_3B29497A5515B9E2EFDABBCCC4D7FE39" xlink:to="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_BBE97CCE30A95A8D74C4BBCCC4D72E40" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/IncomeTaxes" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_BA17C8916EFEA7FBA8A2BBCCC33C3D25" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock_9A4DFBBC2B28F8D01EAEBBCCC33C80C2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_BA17C8916EFEA7FBA8A2BBCCC33C3D25" xlink:to="loc_us-gaap_IncomeTaxDisclosureTextBlock_9A4DFBBC2B28F8D01EAEBBCCC33C80C2" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/IncomeTaxesDeferredTaxAssetsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_522F00ECB36CDC188F3AC959AF1F42C5" xlink:type="locator" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ScheduleOfDeferredTaxesTable" xlink:label="loc_ftnt_ScheduleOfDeferredTaxesTable_3DD2669177E8D4B6E549C959AF20FEFA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_522F00ECB36CDC188F3AC959AF1F42C5" xlink:to="loc_ftnt_ScheduleOfDeferredTaxesTable_3DD2669177E8D4B6E549C959AF20FEFA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_0B89505813BBA0C2BA09C959AF206562" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_ScheduleOfDeferredTaxesTable_3DD2669177E8D4B6E549C959AF20FEFA" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_0B89505813BBA0C2BA09C959AF206562" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_24A52F92B9A472191C9EC959AF20F186" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_0B89505813BBA0C2BA09C959AF206562" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_24A52F92B9A472191C9EC959AF20F186" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DomesticCountryMember" xlink:label="loc_us-gaap_DomesticCountryMember_09E91D69131AF09B396FC959AF207FCC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_24A52F92B9A472191C9EC959AF20F186" xlink:to="loc_us-gaap_DomesticCountryMember_09E91D69131AF09B396FC959AF207FCC" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_StateJurisdictionCaliforniaMember" xlink:label="loc_ftnt_StateJurisdictionCaliforniaMember_75ED0A1AD284A8FB7643C959AF20631A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_24A52F92B9A472191C9EC959AF20F186" xlink:to="loc_ftnt_StateJurisdictionCaliforniaMember_75ED0A1AD284A8FB7643C959AF20631A" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_DeferredTaxesLineItems" xlink:label="loc_ftnt_DeferredTaxesLineItems_17D49C088A1B6AD3CCA1C959AF207D14" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_ScheduleOfDeferredTaxesTable_3DD2669177E8D4B6E549C959AF20FEFA" xlink:to="loc_ftnt_DeferredTaxesLineItems_17D49C088A1B6AD3CCA1C959AF207D14" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_749F7B107DC926AA608EC959AF25708F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_DeferredTaxesLineItems_17D49C088A1B6AD3CCA1C959AF207D14" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_749F7B107DC926AA608EC959AF25708F" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_DeferredTaxAssetNotRecognizedAmountOfUnrecognizedDeferredTaxAssetRelatingToTaxCredits" xlink:label="loc_ftnt_DeferredTaxAssetNotRecognizedAmountOfUnrecognizedDeferredTaxAssetRelatingToTaxCredits_6795236C6A1D3264CDA9C959AF256A1A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_DeferredTaxesLineItems_17D49C088A1B6AD3CCA1C959AF207D14" xlink:to="loc_ftnt_DeferredTaxAssetNotRecognizedAmountOfUnrecognizedDeferredTaxAssetRelatingToTaxCredits_6795236C6A1D3264CDA9C959AF256A1A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ComponentsOfDeferredTaxAssetsAbstract" xlink:label="loc_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_B5C674E145CA9D10344CC959AF25D30A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_DeferredTaxesLineItems_17D49C088A1B6AD3CCA1C959AF207D14" xlink:to="loc_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_B5C674E145CA9D10344CC959AF25D30A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_66012A30BE9C5C3B7E16C959AF257A4B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_B5C674E145CA9D10344CC959AF25D30A" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_66012A30BE9C5C3B7E16C959AF257A4B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxAssetsDeferredIncome" xlink:label="loc_us-gaap_DeferredTaxAssetsDeferredIncome_441A5E1ED9C44907226EC959AF251BA6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_B5C674E145CA9D10344CC959AF25D30A" xlink:to="loc_us-gaap_DeferredTaxAssetsDeferredIncome_441A5E1ED9C44907226EC959AF251BA6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals_937A8CD01B6B88E63A66C959AF257BB0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_B5C674E145CA9D10344CC959AF25D30A" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals_937A8CD01B6B88E63A66C959AF257BB0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment" xlink:label="loc_us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment_C5F17ADE1B1D98610AD1C959AF263E7B" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_B5C674E145CA9D10344CC959AF25D30A" xlink:to="loc_us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment_C5F17ADE1B1D98610AD1C959AF263E7B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness_8011D10D071647D438C0C959AF26248B" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_B5C674E145CA9D10344CC959AF25D30A" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness_8011D10D071647D438C0C959AF26248B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_3FD94C4A00ED824F88FDC959AF267D4C" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_B5C674E145CA9D10344CC959AF25D30A" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_3FD94C4A00ED824F88FDC959AF267D4C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_4C36DF75B00535074727C959AF26F47A" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_B5C674E145CA9D10344CC959AF25D30A" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_4C36DF75B00535074727C959AF26F47A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_13FA2B42C4E60155C4BEC959AF26727E" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_B5C674E145CA9D10344CC959AF25D30A" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_13FA2B42C4E60155C4BEC959AF26727E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLossCarryforwards" xlink:label="loc_us-gaap_OperatingLossCarryforwards_1C7CC7F8BC39493714CFC959AF261B1B" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_DeferredTaxesLineItems_17D49C088A1B6AD3CCA1C959AF207D14" xlink:to="loc_us-gaap_OperatingLossCarryforwards_1C7CC7F8BC39493714CFC959AF261B1B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TaxCreditCarryforwardAmount" xlink:label="loc_us-gaap_TaxCreditCarryforwardAmount_79F1600A547AD6D4E56FC959AF26A697" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_DeferredTaxesLineItems_17D49C088A1B6AD3CCA1C959AF207D14" xlink:to="loc_us-gaap_TaxCreditCarryforwardAmount_79F1600A547AD6D4E56FC959AF26A697" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UndistributedEarningsOfForeignSubsidiaries" xlink:label="loc_us-gaap_UndistributedEarningsOfForeignSubsidiaries_4BCC3CC5A56B0DFC4041C959AF2698F0" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_DeferredTaxesLineItems_17D49C088A1B6AD3CCA1C959AF207D14" xlink:to="loc_us-gaap_UndistributedEarningsOfForeignSubsidiaries_4BCC3CC5A56B0DFC4041C959AF2698F0" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/IncomeTaxesEffectiveTaxRateReconciliationDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_9B1B58A4476909700D617EABF4D8CB16" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_28069DD1FBA1885E582F7EABF4D870E7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_9B1B58A4476909700D617EABF4D8CB16" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_28069DD1FBA1885E582F7EABF4D870E7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_4C753480C90B1A7C15697EABF4D848C1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_9B1B58A4476909700D617EABF4D8CB16" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_4C753480C90B1A7C15697EABF4D848C1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_DE8484A5EEE1563BF33D7EABF4D851DE" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_9B1B58A4476909700D617EABF4D8CB16" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_DE8484A5EEE1563BF33D7EABF4D851DE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities" xlink:label="loc_us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities_9BB7065F6815F821DBA67EABF4D8E62E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_9B1B58A4476909700D617EABF4D8CB16" xlink:to="loc_us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities_9BB7065F6815F821DBA67EABF4D8E62E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxCreditsForeign" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCreditsForeign_FB35B945712628BF52F17EABF4D87777" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_9B1B58A4476909700D617EABF4D8CB16" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCreditsForeign_FB35B945712628BF52F17EABF4D87777" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxCreditsResearch" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_C73530505D30AD509F887EABF4D9C92A" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_9B1B58A4476909700D617EABF4D8CB16" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_C73530505D30AD509F887EABF4D9C92A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential" xlink:label="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_1FB58A99BCEE4C3069FA7EABF4D97FEC" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_9B1B58A4476909700D617EABF4D8CB16" xlink:to="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_1FB58A99BCEE4C3069FA7EABF4D97FEC" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_EffectiveIncomeTaxRateReconciliationForeignWithholdingTaxesAmount" xlink:label="loc_ftnt_EffectiveIncomeTaxRateReconciliationForeignWithholdingTaxesAmount_F74DD5F0EAEC4DF258AE7EABF4D963C2" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_9B1B58A4476909700D617EABF4D8CB16" xlink:to="loc_ftnt_EffectiveIncomeTaxRateReconciliationForeignWithholdingTaxesAmount_F74DD5F0EAEC4DF258AE7EABF4D963C2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_DBFB4662EFB27B3B9D657EABF4D90FBA" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_9B1B58A4476909700D617EABF4D8CB16" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_DBFB4662EFB27B3B9D657EABF4D90FBA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_5E2C5699A1380F781A417EABF4D9E31B" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_9B1B58A4476909700D617EABF4D8CB16" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_5E2C5699A1380F781A417EABF4D9E31B" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/IncomeTaxesProvisionForIncomeTaxDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_17DE21EA9E3CC9D9FA0DBBCCC48E2961" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_CA92B3DC5B74426C6728BBCCC48E0E04" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_17DE21EA9E3CC9D9FA0DBBCCC48E2961" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_CA92B3DC5B74426C6728BBCCC48E0E04" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_A383C53588215661FA08BBCCC48EBF62" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_CA92B3DC5B74426C6728BBCCC48E0E04" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_A383C53588215661FA08BBCCC48EBF62" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_49A4DB79292DCC66B7CCBBCCC48E7C1C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_CA92B3DC5B74426C6728BBCCC48E0E04" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_49A4DB79292DCC66B7CCBBCCC48E7C1C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CurrentForeignTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentForeignTaxExpenseBenefit_605CFEE7BFDCC4B58428BBCCC48E6F2D" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_CA92B3DC5B74426C6728BBCCC48E0E04" xlink:to="loc_us-gaap_CurrentForeignTaxExpenseBenefit_605CFEE7BFDCC4B58428BBCCC48E6F2D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_E1D65231837804BE3ED1BBCCC493D019" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_CA92B3DC5B74426C6728BBCCC48E0E04" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_E1D65231837804BE3ED1BBCCC493D019" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_A7DBB40407818524B05BBBCCC493A82B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_17DE21EA9E3CC9D9FA0DBBCCC48E2961" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_A7DBB40407818524B05BBBCCC493A82B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_2485E9B7591D5833B3B3BBCCC493082C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_A7DBB40407818524B05BBBCCC493A82B" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_2485E9B7591D5833B3B3BBCCC493082C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_A1364E310BE051268984BBCCC493D6A3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_A7DBB40407818524B05BBBCCC493A82B" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_A1364E310BE051268984BBCCC493D6A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_4AC4C1172F6571461EE1BBCCC4944EF5" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_A7DBB40407818524B05BBBCCC493A82B" xlink:to="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_4AC4C1172F6571461EE1BBCCC4944EF5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_78548A272A7DF3EF6496BBCCC4944E64" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_A7DBB40407818524B05BBBCCC493A82B" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_78548A272A7DF3EF6496BBCCC4944E64" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_16957CCAFE0547271B9EBBCCC4948B23" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_17DE21EA9E3CC9D9FA0DBBCCC48E2961" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_16957CCAFE0547271B9EBBCCC4948B23" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/IncomeTaxesReconciliationOfPreTaxIncomedetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_3D9F10899DD43A20DEA1BBCCC36DDC2D" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestmentsAbstract" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestmentsAbstract_640816E2723805EB6546BBCCC36D4996" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_3D9F10899DD43A20DEA1BBCCC36DDC2D" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestmentsAbstract_640816E2723805EB6546BBCCC36D4996" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_717CA99F03516F19719DBBCCC36DC72A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestmentsAbstract_640816E2723805EB6546BBCCC36D4996" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_717CA99F03516F19719DBBCCC36DC72A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_B83532E529AEA9C1B88FBBCCC36D4A9D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestmentsAbstract_640816E2723805EB6546BBCCC36D4996" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_B83532E529AEA9C1B88FBBCCC36D4A9D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_D97B67FB90B049BC25CBBBCCC36DCA0A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestmentsAbstract_640816E2723805EB6546BBCCC36D4996" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_D97B67FB90B049BC25CBBBCCC36DCA0A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/IncomeTaxesTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_768A59458CFFA90720C0BBCCC432E551" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock_489258A59BE07874CAC2BBCCC432F478" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_768A59458CFFA90720C0BBCCC432E551" xlink:to="loc_us-gaap_ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock_489258A59BE07874CAC2BBCCC432F478" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_78A7C856EAEF7E318B7BBBCCC4323F62" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_768A59458CFFA90720C0BBCCC432E551" xlink:to="loc_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_78A7C856EAEF7E318B7BBBCCC4323F62" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_4AB7AC5A9973769F1877BBCCC4323A3B" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_768A59458CFFA90720C0BBCCC432E551" xlink:to="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_4AB7AC5A9973769F1877BBCCC4323A3B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_1D7EFEDAB4729D4E8C72BBCCC4320407" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_768A59458CFFA90720C0BBCCC432E551" xlink:to="loc_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_1D7EFEDAB4729D4E8C72BBCCC4320407" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SummaryOfIncomeTaxContingenciesTextBlock" xlink:label="loc_us-gaap_SummaryOfIncomeTaxContingenciesTextBlock_77C048CB686319EF2E67BBCCC432F8B4" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_768A59458CFFA90720C0BBCCC432E551" xlink:to="loc_us-gaap_SummaryOfIncomeTaxContingenciesTextBlock_77C048CB686319EF2E67BBCCC432F8B4" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/IncomeTaxesUnrecognizedTaxBenefitsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_40B28DFE7FB7C3A6AB137EABF4CC8D41" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_6A6698FD2D9DC9E362AB7EABF4CC879D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_40B28DFE7FB7C3A6AB137EABF4CC8D41" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_6A6698FD2D9DC9E362AB7EABF4CC879D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_6015154AAC0E886619207EABF4CCAA04" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_40B28DFE7FB7C3A6AB137EABF4CC8D41" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_6015154AAC0E886619207EABF4CCAA04" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward" xlink:label="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_E80F977A978E489D97737EABF4CC64D0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_40B28DFE7FB7C3A6AB137EABF4CC8D41" xlink:to="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_E80F977A978E489D97737EABF4CC64D0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_38ACD19FA0C077F54F8F7EABF4CD5BC4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_E80F977A978E489D97737EABF4CC64D0" xlink:to="loc_us-gaap_UnrecognizedTaxBenefits_38ACD19FA0C077F54F8F7EABF4CD5BC4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions_9F08F0E26D4AC0A6F6EB7EABF4CDE1C5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_E80F977A978E489D97737EABF4CC64D0" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions_9F08F0E26D4AC0A6F6EB7EABF4CDE1C5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions_F76D3E0EED91AB9F15E97EABF4CD1CD0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_E80F977A978E489D97737EABF4CC64D0" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions_F76D3E0EED91AB9F15E97EABF4CD1CD0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions_FEF1D0D890F93C17FB967EABF4CD8E6D" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_E80F977A978E489D97737EABF4CC64D0" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions_FEF1D0D890F93C17FB967EABF4CD8E6D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_E206E4C6179DA6C428BA7EABF4CD6C70" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_E80F977A978E489D97737EABF4CC64D0" xlink:to="loc_us-gaap_UnrecognizedTaxBenefits_E206E4C6179DA6C428BA7EABF4CD6C70" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LiabilityForUncertainTaxPositionsNoncurrent" xlink:label="loc_us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_8D416ACEE2C4704B08117EABF4CD117E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_40B28DFE7FB7C3A6AB137EABF4CC8D41" xlink:to="loc_us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_8D416ACEE2C4704B08117EABF4CD117E" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/Inventory" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_6A08F09014EA20964755BBCCC300998B" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryDisclosureTextBlock" xlink:label="loc_us-gaap_InventoryDisclosureTextBlock_D7F8E7E23FF50D9DA3D6BBCCC30015A0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_6A08F09014EA20964755BBCCC300998B" xlink:to="loc_us-gaap_InventoryDisclosureTextBlock_D7F8E7E23FF50D9DA3D6BBCCC30015A0" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/InventoryDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_3226D812AC3B9D6138F67E99E63569A0" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryNetAbstract" xlink:label="loc_us-gaap_InventoryNetAbstract_15D14BD5727AC1F1E4777E99E636700C" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_3226D812AC3B9D6138F67E99E63569A0" xlink:to="loc_us-gaap_InventoryNetAbstract_15D14BD5727AC1F1E4777E99E636700C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryRawMaterialsNetOfReserves" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_8336DBAE3BB804A693277E99E637B416" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryNetAbstract_15D14BD5727AC1F1E4777E99E636700C" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_8336DBAE3BB804A693277E99E637B416" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_34E9AB83F60526120A177E99E63C40E0" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryNetAbstract_15D14BD5727AC1F1E4777E99E636700C" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_34E9AB83F60526120A177E99E63C40E0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_E1A500BBF8949DF27F2D7E99E63CCFFB" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryNetAbstract_15D14BD5727AC1F1E4777E99E636700C" xlink:to="loc_us-gaap_InventoryNet_E1A500BBF8949DF27F2D7E99E63CCFFB" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_InventoryFinishedGoodsNetofReservesHeldbyDistributors" xlink:label="loc_ftnt_InventoryFinishedGoodsNetofReservesHeldbyDistributors_71728168BD3F39BFC0707E9AB017F493" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryNetAbstract_15D14BD5727AC1F1E4777E99E636700C" xlink:to="loc_ftnt_InventoryFinishedGoodsNetofReservesHeldbyDistributors_71728168BD3F39BFC0707E9AB017F493" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_InventoryRawMaterialsNetofReservesatContractManufacturers" xlink:label="loc_ftnt_InventoryRawMaterialsNetofReservesatContractManufacturers_AA3F8BF2B0CD14619ECE7E9CD2C03CC6" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryNetAbstract_15D14BD5727AC1F1E4777E99E636700C" xlink:to="loc_ftnt_InventoryRawMaterialsNetofReservesatContractManufacturers_AA3F8BF2B0CD14619ECE7E9CD2C03CC6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/InventoryTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_DADC923616A40D4F4F18BBCCC2F8BD92" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_93CB6A38EF4162724F61BBCCC2F8EE78" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_DADC923616A40D4F4F18BBCCC2F8BD92" xlink:to="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_93CB6A38EF4162724F61BBCCC2F8EE78" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/InvestmentsInPrivatelyHeldCompanies" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InvestmentsAllOtherInvestmentsAbstract" xlink:label="loc_us-gaap_InvestmentsAllOtherInvestmentsAbstract_65F52E090E431228E4C0CC4126046E2E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CostMethodInvestmentsDescriptionTextBlock" xlink:label="loc_us-gaap_CostMethodInvestmentsDescriptionTextBlock_40D5B9716CBB90DB5BFECC41260427EA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsAllOtherInvestmentsAbstract_65F52E090E431228E4C0CC4126046E2E" xlink:to="loc_us-gaap_CostMethodInvestmentsDescriptionTextBlock_40D5B9716CBB90DB5BFECC41260427EA" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/InvestmentsInPrivatelyHeldCompaniesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InvestmentsAllOtherInvestmentsAbstract" xlink:label="loc_us-gaap_InvestmentsAllOtherInvestmentsAbstract_72FEAFBB6F4EF0D1BA39CC4126022243" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CostMethodInvestmentsOriginalCost" xlink:label="loc_us-gaap_CostMethodInvestmentsOriginalCost_B14AFF40A88C5B0B74A4CC412602ED58" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsAllOtherInvestmentsAbstract_72FEAFBB6F4EF0D1BA39CC4126022243" xlink:to="loc_us-gaap_CostMethodInvestmentsOriginalCost_B14AFF40A88C5B0B74A4CC412602ED58" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_NumberofPrivatelyHeldCompanies" xlink:label="loc_ftnt_NumberofPrivatelyHeldCompanies_44224FF2938B54F1E1F8CC4126026FD6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsAllOtherInvestmentsAbstract_72FEAFBB6F4EF0D1BA39CC4126022243" xlink:to="loc_ftnt_NumberofPrivatelyHeldCompanies_44224FF2938B54F1E1F8CC4126026FD6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/NetIncomePerShare" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_EC1C0C983B3F48356A34BBCCC40C5521" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="loc_us-gaap_EarningsPerShareTextBlock_38C5076F73235291EE1BBBCCC40C9800" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_EC1C0C983B3F48356A34BBCCC40C5521" xlink:to="loc_us-gaap_EarningsPerShareTextBlock_38C5076F73235291EE1BBBCCC40C9800" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/NetIncomePerShareAntiDilutiveSecuritiesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_8D03FA98ED33CDF651C1BBCCC3C3271B" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_E621A8AE46C3ACF2ACB0BBCCC3C3ACFC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_8D03FA98ED33CDF651C1BBCCC3C3271B" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_E621A8AE46C3ACF2ACB0BBCCC3C3ACFC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_4ACFBBDB27E6FEF3BD7ABBCCC3C43E2E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_E621A8AE46C3ACF2ACB0BBCCC3C3ACFC" xlink:to="loc_us-gaap_AwardTypeAxis_4ACFBBDB27E6FEF3BD7ABBCCC3C43E2E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BAE9239F0EB50364845EBBCCC3C4EBC6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_4ACFBBDB27E6FEF3BD7ABBCCC3C43E2E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BAE9239F0EB50364845EBBCCC3C4EBC6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_A39CE627EBCA59B0C6A3BBCCC3C46A6A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BAE9239F0EB50364845EBBCCC3C4EBC6" xlink:to="loc_us-gaap_EmployeeStockOptionMember_A39CE627EBCA59B0C6A3BBCCC3C46A6A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_EFB455160F2D6B66814EBBCCC3C4B7D2" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BAE9239F0EB50364845EBBCCC3C4EBC6" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_EFB455160F2D6B66814EBBCCC3C4B7D2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockMember" xlink:label="loc_us-gaap_EmployeeStockMember_647CAB761089213B1032BBCCC3C46B02" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BAE9239F0EB50364845EBBCCC3C4EBC6" xlink:to="loc_us-gaap_EmployeeStockMember_647CAB761089213B1032BBCCC3C46B02" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_D214B63D60549D9BA0FDBBCCC3C4BDE6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_E621A8AE46C3ACF2ACB0BBCCC3C3ACFC" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_D214B63D60549D9BA0FDBBCCC3C4BDE6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_85D17649D1DFD8725BB3BBCCC3C41737" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_D214B63D60549D9BA0FDBBCCC3C4BDE6" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_85D17649D1DFD8725BB3BBCCC3C41737" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockCompensationPlanMember" xlink:label="loc_us-gaap_StockCompensationPlanMember_436259ADBDA06C467842BBCCC3C4D8EB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_85D17649D1DFD8725BB3BBCCC3C41737" xlink:to="loc_us-gaap_StockCompensationPlanMember_436259ADBDA06C467842BBCCC3C4D8EB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_52D9A2C96278E6C00FB3BBCCC3C42F98" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_E621A8AE46C3ACF2ACB0BBCCC3C3ACFC" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_52D9A2C96278E6C00FB3BBCCC3C42F98" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_2E03598E66E0A8B73676BBCCC3C49E43" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_52D9A2C96278E6C00FB3BBCCC3C42F98" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_2E03598E66E0A8B73676BBCCC3C49E43" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/NetIncomePerShareCalculationOfBasicAndDilutedDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_8EE87CFBCF7F27D69CD9BBCCC4632442" xlink:type="locator" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ScheduleOfEarningsPerShareTable" xlink:label="loc_ftnt_ScheduleOfEarningsPerShareTable_AC491411CD419B860625BBCCC4632594" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_8EE87CFBCF7F27D69CD9BBCCC4632442" xlink:to="loc_ftnt_ScheduleOfEarningsPerShareTable_AC491411CD419B860625BBCCC4632594" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_6C24CE1B12F9F04A391FBBCCC463CDEB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_ScheduleOfEarningsPerShareTable_AC491411CD419B860625BBCCC4632594" xlink:to="loc_us-gaap_AwardTypeAxis_6C24CE1B12F9F04A391FBBCCC463CDEB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_076AE4E7A889E888E2A0BBCCC463844F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_6C24CE1B12F9F04A391FBBCCC463CDEB" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_076AE4E7A889E888E2A0BBCCC463844F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_2E0125126EE298A5DFF2BBCCC463E13A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_076AE4E7A889E888E2A0BBCCC463844F" xlink:to="loc_us-gaap_EmployeeStockOptionMember_2E0125126EE298A5DFF2BBCCC463E13A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_F97F6F716F70FBE772D9BBCCC46381C5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_076AE4E7A889E888E2A0BBCCC463844F" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_F97F6F716F70FBE772D9BBCCC46381C5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockMember" xlink:label="loc_us-gaap_EmployeeStockMember_B9A0C17327C5BEA95D36BBCCC463013B" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_076AE4E7A889E888E2A0BBCCC463844F" xlink:to="loc_us-gaap_EmployeeStockMember_B9A0C17327C5BEA95D36BBCCC463013B" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_EarningsPerShareLineItems" xlink:label="loc_ftnt_EarningsPerShareLineItems_4F396C7D053F71BE4AC2BBCCC4634CD0" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_ScheduleOfEarningsPerShareTable_AC491411CD419B860625BBCCC4632594" xlink:to="loc_ftnt_EarningsPerShareLineItems_4F396C7D053F71BE4AC2BBCCC4634CD0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_D417784213598529D22BBBCCC4638CFD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_EarningsPerShareLineItems_4F396C7D053F71BE4AC2BBCCC4634CD0" xlink:to="loc_us-gaap_NetIncomeLoss_D417784213598529D22BBBCCC4638CFD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_7F7C5ADC806346D6647DBBCCC4639152" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_EarningsPerShareLineItems_4F396C7D053F71BE4AC2BBCCC4634CD0" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_7F7C5ADC806346D6647DBBCCC4639152" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_99225670C87016255531BBCCC46364F3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_7F7C5ADC806346D6647DBBCCC4639152" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_99225670C87016255531BBCCC46364F3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_7B259FF0398BB625DCF7BBCCC46308F9" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_EarningsPerShareLineItems_4F396C7D053F71BE4AC2BBCCC4634CD0" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_7B259FF0398BB625DCF7BBCCC46308F9" xlink:type="arc" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_7B259FF0398BB625DCF7BBCCC46308F9" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_99225670C87016255531BBCCC46364F3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_302C11C75D712BFB24F9BBCCC4654922" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_EarningsPerShareLineItems_4F396C7D053F71BE4AC2BBCCC4634CD0" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_302C11C75D712BFB24F9BBCCC4654922" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_C7F6B764FE60B6A1F516BBCCC465C490" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_302C11C75D712BFB24F9BBCCC4654922" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_C7F6B764FE60B6A1F516BBCCC465C490" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_FEF23B9D3CB735737B52BBCCC465C630" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_302C11C75D712BFB24F9BBCCC4654922" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_FEF23B9D3CB735737B52BBCCC465C630" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_D32517E99A451A8FE332BBCCC46501EF" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_EarningsPerShareLineItems_4F396C7D053F71BE4AC2BBCCC4634CD0" xlink:to="loc_us-gaap_EarningsPerShareBasic_D32517E99A451A8FE332BBCCC46501EF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_12F160F9E42EDA737FFBBBCCC4656B59" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_EarningsPerShareLineItems_4F396C7D053F71BE4AC2BBCCC4634CD0" xlink:to="loc_us-gaap_EarningsPerShareDiluted_12F160F9E42EDA737FFBBBCCC4656B59" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/NetIncomePerShareTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_54D89D4F2CA65DFA9D63BBCCC4A7560C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_6E413BB33ABBA62B4CA6BBCCC4A7FE55" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_54D89D4F2CA65DFA9D63BBCCC4A7560C" xlink:to="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_6E413BB33ABBA62B4CA6BBCCC4A7FE55" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_780AB561E74EEE27896BBBCCC4A853E9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_54D89D4F2CA65DFA9D63BBCCC4A7560C" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_780AB561E74EEE27896BBBCCC4A853E9" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/PropertyAndEquipmentnet" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAbstract_A6A26AE85ADC76D0BF7CBBCCC32622AA" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_3B2856786C7392507982BBCCC32667BA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAbstract_A6A26AE85ADC76D0BF7CBBCCC32622AA" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_3B2856786C7392507982BBCCC32667BA" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/PropertyAndEquipmentnetDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAbstract_70AA76ADB74F0E73EF51604B2E948016" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_BCD51C12DC4FB7ADB218604B2E94525F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAbstract_70AA76ADB74F0E73EF51604B2E948016" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_BCD51C12DC4FB7ADB218604B2E94525F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_387833D91D1B370DE6F3604B2E94C9AC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_BCD51C12DC4FB7ADB218604B2E94525F" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_387833D91D1B370DE6F3604B2E94C9AC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_B7A9B571536F0E58C084604B2E958BC9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_387833D91D1B370DE6F3604B2E94C9AC" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_B7A9B571536F0E58C084604B2E958BC9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LandMember" xlink:label="loc_us-gaap_LandMember_797BE4E5717BEFC2B8E0604B2E95B47F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_B7A9B571536F0E58C084604B2E958BC9" xlink:to="loc_us-gaap_LandMember_797BE4E5717BEFC2B8E0604B2E95B47F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_8C65D7AF90B9971AEFB9604B2E955CB9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_B7A9B571536F0E58C084604B2E958BC9" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_8C65D7AF90B9971AEFB9604B2E955CB9" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_EvaluationUnitsMember" xlink:label="loc_ftnt_EvaluationUnitsMember_7EBBD1C4234F7BE25AE1604B2E95C4F1" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_B7A9B571536F0E58C084604B2E958BC9" xlink:to="loc_ftnt_EvaluationUnitsMember_7EBBD1C4234F7BE25AE1604B2E95C4F1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ComputerEquipmentMember" xlink:label="loc_us-gaap_ComputerEquipmentMember_8DEBB8BF7F811738ED36604B2E957D5A" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_B7A9B571536F0E58C084604B2E958BC9" xlink:to="loc_us-gaap_ComputerEquipmentMember_8DEBB8BF7F811738ED36604B2E957D5A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_028F373757EC5DC85D37604B2E95715A" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_B7A9B571536F0E58C084604B2E958BC9" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_028F373757EC5DC85D37604B2E95715A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConstructionInProgressMember" xlink:label="loc_us-gaap_ConstructionInProgressMember_74C7399D3AF79CEA71E7604B2E959450" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_B7A9B571536F0E58C084604B2E958BC9" xlink:to="loc_us-gaap_ConstructionInProgressMember_74C7399D3AF79CEA71E7604B2E959450" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LeaseholdsAndLeaseholdImprovementsMember" xlink:label="loc_us-gaap_LeaseholdsAndLeaseholdImprovementsMember_B90D819CD74376C232C7604B2E95B752" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_B7A9B571536F0E58C084604B2E958BC9" xlink:to="loc_us-gaap_LeaseholdsAndLeaseholdImprovementsMember_B90D819CD74376C232C7604B2E95B752" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_CEEBF4B4E2EED7E5170E604B2E952A6E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_BCD51C12DC4FB7ADB218604B2E94525F" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentLineItems_CEEBF4B4E2EED7E5170E604B2E952A6E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract_D54F394655BF9FEA5101604B2E957330" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_CEEBF4B4E2EED7E5170E604B2E952A6E" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract_D54F394655BF9FEA5101604B2E957330" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_F1991537C9E1D7C9197C604B2E95BFFA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract_D54F394655BF9FEA5101604B2E957330" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_F1991537C9E1D7C9197C604B2E95BFFA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_83C291827EB6CD890BB2604B2E9559C5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract_D54F394655BF9FEA5101604B2E957330" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_83C291827EB6CD890BB2604B2E9559C5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_0FCA52243D3476F25EE7604B2E95D8C3" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract_D54F394655BF9FEA5101604B2E957330" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_0FCA52243D3476F25EE7604B2E95D8C3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_265A816CD8F1C1CAB57960791F8B289D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_CEEBF4B4E2EED7E5170E604B2E952A6E" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_265A816CD8F1C1CAB57960791F8B289D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_C4DA139A7907F2D9B2D1604B2E9523EC" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_CEEBF4B4E2EED7E5170E604B2E952A6E" xlink:to="loc_us-gaap_Depreciation_C4DA139A7907F2D9B2D1604B2E9523EC" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/PropertyAndEquipmentnetTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAbstract_350C6307B13D041BE6D3BBCCC3290303" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_6ADA414982FE8A8990E3BBCCC3292757" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAbstract_350C6307B13D041BE6D3BBCCC3290303" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_6ADA414982FE8A8990E3BBCCC3292757" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/RelatedPartyTransactions" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="loc_us-gaap_RelatedPartyTransactionsAbstract_24020730A91DD55DA463C8C59DFE20C9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:label="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_625A068355DB9484E15EC8C6CC12383F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyTransactionsAbstract_24020730A91DD55DA463C8C59DFE20C9" xlink:to="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_625A068355DB9484E15EC8C6CC12383F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/RelatedPartyTransactionsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="loc_us-gaap_RelatedPartyTransactionsAbstract_02424054E99FC4C969E7C8C59E5B1631" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_E27D7D3B5BB2AB06C1E9C8CC996F6E63" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyTransactionsAbstract_02424054E99FC4C969E7C8C59E5B1631" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_E27D7D3B5BB2AB06C1E9C8CC996F6E63" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_379579A99DEF10EDD9E5C8CC996FC95B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_E27D7D3B5BB2AB06C1E9C8CC996F6E63" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_379579A99DEF10EDD9E5C8CC996FC95B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_32C9798EDD784BBE221EC8CC99709083" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_379579A99DEF10EDD9E5C8CC996FC95B" xlink:to="loc_us-gaap_RelatedPartyDomain_32C9798EDD784BBE221EC8CC99709083" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember" xlink:label="loc_us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember_611DE553FF8FD1FDD46CC8CE7ECDEE52" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyDomain_32C9798EDD784BBE221EC8CC99709083" xlink:to="loc_us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember_611DE553FF8FD1FDD46CC8CE7ECDEE52" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_A52B1498D5A43C460004C8CC99717F76" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_E27D7D3B5BB2AB06C1E9C8CC996F6E63" xlink:to="loc_us-gaap_RelatedPartyTransactionLineItems_A52B1498D5A43C460004C8CC99717F76" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" xlink:label="loc_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_236F4B7F6CFCD47EBFC7C8D4448FF314" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_A52B1498D5A43C460004C8CC99717F76" xlink:to="loc_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_236F4B7F6CFCD47EBFC7C8D4448FF314" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent_938BE594BC21704D89DBC8D5B1DE83EE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_A52B1498D5A43C460004C8CC99717F76" xlink:to="loc_us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent_938BE594BC21704D89DBC8D5B1DE83EE" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/ScheduleIi" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsAbstract" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsAbstract_085BDCD22B9AAD6B0ED2BBCCC3ADD843" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock" xlink:label="loc_us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock_2963858C91833019AACABBCCC3AD5EE0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsAbstract_085BDCD22B9AAD6B0ED2BBCCC3ADD843" xlink:to="loc_us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock_2963858C91833019AACABBCCC3AD5EE0" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/ScheduleIiDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsAbstract" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsAbstract_77DD1AC22596D824EF27CB9047309DC9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsDisclosureTable" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_6E7FF0C1F0DC4F767889CB904730A968" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsAbstract_77DD1AC22596D824EF27CB9047309DC9" xlink:to="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_6E7FF0C1F0DC4F767889CB904730A968" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_6003877D8908F19A1958CB90473052BF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_6E7FF0C1F0DC4F767889CB904730A968" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_6003877D8908F19A1958CB90473052BF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_812151AFFE15B183DBB1CB90473039A0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_6003877D8908F19A1958CB90473052BF" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_812151AFFE15B183DBB1CB90473039A0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsMember" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsMember_89B634CAE5133D7A9212CB904730E0E7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_812151AFFE15B183DBB1CB90473039A0" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsMember_89B634CAE5133D7A9212CB904730E0E7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AllowanceForSalesReturnsMember" xlink:label="loc_us-gaap_AllowanceForSalesReturnsMember_353FB05C210E9E0512AACB904730331B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_812151AFFE15B183DBB1CB90473039A0" xlink:to="loc_us-gaap_AllowanceForSalesReturnsMember_353FB05C210E9E0512AACB904730331B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_6E6E04C1F436B03392FDCB904730740D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_6E7FF0C1F0DC4F767889CB904730A968" xlink:to="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_6E6E04C1F436B03392FDCB904730740D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MovementInValuationAllowancesAndReservesRollForward" xlink:label="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_006A6DBCDF17B609A74ACB9047314B15" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_6E6E04C1F436B03392FDCB904730740D" xlink:to="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_006A6DBCDF17B609A74ACB9047314B15" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_0A38FFFE515947F2E415CB9047313974" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_006A6DBCDF17B609A74ACB9047314B15" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_0A38FFFE515947F2E415CB9047313974" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_DC8D2BA8B01C5F65853ECB9047319B1A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_006A6DBCDF17B609A74ACB9047314B15" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_DC8D2BA8B01C5F65853ECB9047319B1A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_B741FD366387DE9CFDF8CB904731490D" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_006A6DBCDF17B609A74ACB9047314B15" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_B741FD366387DE9CFDF8CB904731490D" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SegmentInformation" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_790544578D685F3C9184BBCCC34A3797" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_207ACFEEFBDDA0A70F57BBCCC34A266B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_790544578D685F3C9184BBCCC34A3797" xlink:to="loc_us-gaap_SegmentReportingDisclosureTextBlock_207ACFEEFBDDA0A70F57BBCCC34A266B" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SegmentInformationDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_3829B26699A5D57B084C60D6A578DE0C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5504B82D181BC31AB8BF60D6A578984F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_3829B26699A5D57B084C60D6A578DE0C" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5504B82D181BC31AB8BF60D6A578984F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_29C1255553BBCE30739860D6A57842DB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5504B82D181BC31AB8BF60D6A578984F" xlink:to="loc_us-gaap_StatementGeographicalAxis_29C1255553BBCE30739860D6A57842DB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_8629D393721768D236C660D6A578CED8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementGeographicalAxis_29C1255553BBCE30739860D6A57842DB" xlink:to="loc_us-gaap_SegmentGeographicalDomain_8629D393721768D236C660D6A578CED8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AmericasMember" xlink:label="loc_us-gaap_AmericasMember_519BDEF2905D47DE2E1E60D6A5792A3D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_8629D393721768D236C660D6A578CED8" xlink:to="loc_us-gaap_AmericasMember_519BDEF2905D47DE2E1E60D6A5792A3D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd#country_US" xlink:label="loc_country_US_3C28D916F76DC2AA254560D6A57993E6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AmericasMember_519BDEF2905D47DE2E1E60D6A5792A3D" xlink:to="loc_country_US_3C28D916F76DC2AA254560D6A57993E6" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_CanadaMember" xlink:label="loc_ftnt_CanadaMember_F7215528711F0A679B6160D6A579E53B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AmericasMember_519BDEF2905D47DE2E1E60D6A5792A3D" xlink:to="loc_ftnt_CanadaMember_F7215528711F0A679B6160D6A579E53B" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_OtherAmericasMember" xlink:label="loc_ftnt_OtherAmericasMember_0078F7BC967D55E25C6B60D6A57937DD" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AmericasMember_519BDEF2905D47DE2E1E60D6A5792A3D" xlink:to="loc_ftnt_OtherAmericasMember_0078F7BC967D55E25C6B60D6A57937DD" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_EuropeMiddleEastAndAfricaMember" xlink:label="loc_ftnt_EuropeMiddleEastAndAfricaMember_65D67FD55C213D492A1F60D6A579C580" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_8629D393721768D236C660D6A578CED8" xlink:to="loc_ftnt_EuropeMiddleEastAndAfricaMember_65D67FD55C213D492A1F60D6A579C580" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_AsiaPacificAndJapanMember" xlink:label="loc_ftnt_AsiaPacificAndJapanMember_8F6CC0747B13DF845C2160D6A579AA7E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_8629D393721768D236C660D6A578CED8" xlink:to="loc_ftnt_AsiaPacificAndJapanMember_8F6CC0747B13DF845C2160D6A579AA7E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_90D86767B9302CE3096360D6A57968A8" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5504B82D181BC31AB8BF60D6A578984F" xlink:to="loc_us-gaap_SegmentReportingInformationLineItems_90D86767B9302CE3096360D6A57968A8" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_NumberOfBusinessActivities" xlink:label="loc_ftnt_NumberOfBusinessActivities_71CB68D714D889C0CF2D60D6A579EA10" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_90D86767B9302CE3096360D6A57968A8" xlink:to="loc_ftnt_NumberOfBusinessActivities_71CB68D714D889C0CF2D60D6A579EA10" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_NumberOfSegmentManagersResponsibleForOperations" xlink:label="loc_ftnt_NumberOfSegmentManagersResponsibleForOperations_5F84A1AB09F14539CDE860D6A5798496" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_90D86767B9302CE3096360D6A57968A8" xlink:to="loc_ftnt_NumberOfSegmentManagersResponsibleForOperations_5F84A1AB09F14539CDE860D6A5798496" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="loc_us-gaap_NumberOfOperatingSegments_D0B08902B3D589CBC76560D6A579D5D7" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_90D86767B9302CE3096360D6A57968A8" xlink:to="loc_us-gaap_NumberOfOperatingSegments_D0B08902B3D589CBC76560D6A579D5D7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:label="loc_us-gaap_NumberOfReportableSegments_5743E35792150EECE89460D6A57985A1" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_90D86767B9302CE3096360D6A57968A8" xlink:to="loc_us-gaap_NumberOfReportableSegments_5743E35792150EECE89460D6A57985A1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_258519AB7209754FF10260D6A579A3A8" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_90D86767B9302CE3096360D6A57968A8" xlink:to="loc_us-gaap_SalesRevenueNet_258519AB7209754FF10260D6A579A3A8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_E3347CDED97E17010D9760D6A5799C16" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_90D86767B9302CE3096360D6A57968A8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_E3347CDED97E17010D9760D6A5799C16" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SegmentInformationTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_E45139EA68518274462BBBCCC2C4B40C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_5769D0BA02FB1FAA4F99BBCCC2C45BF6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_E45139EA68518274462BBBCCC2C4B40C" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_5769D0BA02FB1FAA4F99BBCCC2C45BF6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/StockholdersEquity" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_CC91E4BD592FDC8170E7BBCCC2B28AF4" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_94F3FBC25330F919A884BBCCC2B3FF7F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_CC91E4BD592FDC8170E7BBCCC2B28AF4" xlink:to="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_94F3FBC25330F919A884BBCCC2B3FF7F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/StockholdersEquityAllocationOfStockBasedCompensationExpenseDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_0A35BBABED928B15ECEBCB8E42D39E4E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_3ACC8AA7C13580B3CF0ECB8E42D51729" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_0A35BBABED928B15ECEBCB8E42D39E4E" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_3ACC8AA7C13580B3CF0ECB8E42D51729" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_80E4A5DC1009ED43DE7BCB8E42D5FB49" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_3ACC8AA7C13580B3CF0ECB8E42D51729" xlink:to="loc_us-gaap_AwardTypeAxis_80E4A5DC1009ED43DE7BCB8E42D5FB49" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0475F4C0CA0AA294A073CB8E42D512D9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_80E4A5DC1009ED43DE7BCB8E42D5FB49" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0475F4C0CA0AA294A073CB8E42D512D9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_46307BAE928915A2F203CB8E42D59E66" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0475F4C0CA0AA294A073CB8E42D512D9" xlink:to="loc_us-gaap_EmployeeStockOptionMember_46307BAE928915A2F203CB8E42D59E66" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_D2FA97EC6138BC2E5317CB8E42D5665D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0475F4C0CA0AA294A073CB8E42D512D9" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_D2FA97EC6138BC2E5317CB8E42D5665D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockMember" xlink:label="loc_us-gaap_EmployeeStockMember_3955C3547434E00C91B4CB8E42D5E0FE" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0475F4C0CA0AA294A073CB8E42D512D9" xlink:to="loc_us-gaap_EmployeeStockMember_3955C3547434E00C91B4CB8E42D5E0FE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_1F977A1747AA5A977CB3CB8E42D5273E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_3ACC8AA7C13580B3CF0ECB8E42D51729" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_1F977A1747AA5A977CB3CB8E42D5273E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_BB80F5176A3E58B5B77FCB8E42D5A687" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_1F977A1747AA5A977CB3CB8E42D5273E" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_BB80F5176A3E58B5B77FCB8E42D5A687" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_CostOfGoodsSoldMember" xlink:label="loc_ftnt_CostOfGoodsSoldMember_B3DDB34DBF19E215CBBECB8E42D69064" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_BB80F5176A3E58B5B77FCB8E42D5A687" xlink:to="loc_ftnt_CostOfGoodsSoldMember_B3DDB34DBF19E215CBBECB8E42D69064" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_CostOfServicesMember" xlink:label="loc_ftnt_CostOfServicesMember_831FAF508C078EC5BC4FCB8E42D62DF8" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_BB80F5176A3E58B5B77FCB8E42D5A687" xlink:to="loc_ftnt_CostOfServicesMember_831FAF508C078EC5BC4FCB8E42D62DF8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_BB34FB4960E536D62FF0CB8E42D62103" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_BB80F5176A3E58B5B77FCB8E42D5A687" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_BB34FB4960E536D62FF0CB8E42D62103" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SellingAndMarketingExpenseMember" xlink:label="loc_us-gaap_SellingAndMarketingExpenseMember_0A0DA0D1D9164B9B7C3CCB8E42D6B22C" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_BB80F5176A3E58B5B77FCB8E42D5A687" xlink:to="loc_us-gaap_SellingAndMarketingExpenseMember_0A0DA0D1D9164B9B7C3CCB8E42D6B22C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GeneralAndAdministrativeExpenseMember" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember_2FC430946D5259810772CB8E42D6E1ED" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_BB80F5176A3E58B5B77FCB8E42D5A687" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpenseMember_2FC430946D5259810772CB8E42D6E1ED" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_F6436D3B0E583A9CA2D9CB8E42D6ACAA" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_3ACC8AA7C13580B3CF0ECB8E42D51729" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_F6436D3B0E583A9CA2D9CB8E42D6ACAA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_73744EB7E8F609A342ABCB8E42D6894B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_F6436D3B0E583A9CA2D9CB8E42D6ACAA" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_73744EB7E8F609A342ABCB8E42D6894B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions_EBF758D2BE865FECA6C7CB8E42D62A86" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_F6436D3B0E583A9CA2D9CB8E42D6ACAA" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions_EBF758D2BE865FECA6C7CB8E42D62A86" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/StockholdersEquityDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_9E9DC7A44DBE7642E7B1CB8E36FD058E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_73EA63C65998EBA03A6ECB8E36FDE261" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_9E9DC7A44DBE7642E7B1CB8E36FD058E" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_73EA63C65998EBA03A6ECB8E36FDE261" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_1CDC584A7DE994A5B667CB8E36FD2B1D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_73EA63C65998EBA03A6ECB8E36FDE261" xlink:to="loc_us-gaap_RangeAxis_1CDC584A7DE994A5B667CB8E36FD2B1D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_B7CFD91BD0EA0476861FCB8E36FDC0A0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_1CDC584A7DE994A5B667CB8E36FD2B1D" xlink:to="loc_us-gaap_RangeMember_B7CFD91BD0EA0476861FCB8E36FDC0A0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_98ADD021A4A30ABB03E7CB8E36FD01BA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_B7CFD91BD0EA0476861FCB8E36FDC0A0" xlink:to="loc_us-gaap_MinimumMember_98ADD021A4A30ABB03E7CB8E36FD01BA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_431B424C565443B2137DCB8E36FDF9B3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_B7CFD91BD0EA0476861FCB8E36FDC0A0" xlink:to="loc_us-gaap_MaximumMember_431B424C565443B2137DCB8E36FDF9B3" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAuthorizedSharesChangesAxis" xlink:label="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAuthorizedSharesChangesAxis_E59D5D8C1A7BF12F9F3ECB8E36FE8DE3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_73EA63C65998EBA03A6ECB8E36FDE261" xlink:to="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAuthorizedSharesChangesAxis_E59D5D8C1A7BF12F9F3ECB8E36FE8DE3" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAuthorizedSharesChangesDomain" xlink:label="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAuthorizedSharesChangesDomain_A1E0044FF89EE35E9E9DCB8E36FE639C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAuthorizedSharesChangesAxis_E59D5D8C1A7BF12F9F3ECB8E36FE8DE3" xlink:to="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAuthorizedSharesChangesDomain_A1E0044FF89EE35E9E9DCB8E36FE639C" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShareBasedCompensationAwardAuthorizedNumberChangesLesserOfFixedAmountOfSharesMember" xlink:label="loc_ftnt_ShareBasedCompensationAwardAuthorizedNumberChangesLesserOfFixedAmountOfSharesMember_3886A27E5585D7A2DF7ACB8E36FE001B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAuthorizedSharesChangesDomain_A1E0044FF89EE35E9E9DCB8E36FE639C" xlink:to="loc_ftnt_ShareBasedCompensationAwardAuthorizedNumberChangesLesserOfFixedAmountOfSharesMember_3886A27E5585D7A2DF7ACB8E36FE001B" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShareBasedCompensationAwardAuthorizedNumberChangesLesserOfOutstandingSharesOnLastDayOfPreceedingYearMember" xlink:label="loc_ftnt_ShareBasedCompensationAwardAuthorizedNumberChangesLesserOfOutstandingSharesOnLastDayOfPreceedingYearMember_9CE4F21885B0D8F59C15CB8E36FEA8EB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAuthorizedSharesChangesDomain_A1E0044FF89EE35E9E9DCB8E36FE639C" xlink:to="loc_ftnt_ShareBasedCompensationAwardAuthorizedNumberChangesLesserOfOutstandingSharesOnLastDayOfPreceedingYearMember_9CE4F21885B0D8F59C15CB8E36FEA8EB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TitleOfIndividualAxis" xlink:label="loc_us-gaap_TitleOfIndividualAxis_FAA7D86C7E7E402B5BE3CB8E36FEE2B6" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_73EA63C65998EBA03A6ECB8E36FDE261" xlink:to="loc_us-gaap_TitleOfIndividualAxis_FAA7D86C7E7E402B5BE3CB8E36FEE2B6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_529E0A44E96EC9D71163CB8E36FE2C4B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TitleOfIndividualAxis_FAA7D86C7E7E402B5BE3CB8E36FEE2B6" xlink:to="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_529E0A44E96EC9D71163CB8E36FE2C4B" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_IndividualOwning10PercentOrMoreOfStockMember" xlink:label="loc_ftnt_IndividualOwning10PercentOrMoreOfStockMember_EEE3C8684D4A03DB5FBECB8E36FE8BEB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_529E0A44E96EC9D71163CB8E36FE2C4B" xlink:to="loc_ftnt_IndividualOwning10PercentOrMoreOfStockMember_EEE3C8684D4A03DB5FBECB8E36FE8BEB" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_EmployeeMember" xlink:label="loc_ftnt_EmployeeMember_F351BC90F40ADC03EC2BCB8E36FE43ED" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_529E0A44E96EC9D71163CB8E36FE2C4B" xlink:to="loc_ftnt_EmployeeMember_F351BC90F40ADC03EC2BCB8E36FE43ED" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_DirectorsAndOtherServiceProvidersMember" xlink:label="loc_ftnt_DirectorsAndOtherServiceProvidersMember_89827B840DD979DF4704CB8E36FEC355" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_529E0A44E96EC9D71163CB8E36FE2C4B" xlink:to="loc_ftnt_DirectorsAndOtherServiceProvidersMember_89827B840DD979DF4704CB8E36FEC355" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_IndividualOwning10PercentOrLessOfStockMember" xlink:label="loc_ftnt_IndividualOwning10PercentOrLessOfStockMember_EFEC6C9D0245A53F0A48CB8E36FEA41B" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_529E0A44E96EC9D71163CB8E36FE2C4B" xlink:to="loc_ftnt_IndividualOwning10PercentOrLessOfStockMember_EFEC6C9D0245A53F0A48CB8E36FEA41B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_B6A3BF9B0BF323282EFCCB8E36FE52FA" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_73EA63C65998EBA03A6ECB8E36FDE261" xlink:to="loc_us-gaap_PlanNameAxis_B6A3BF9B0BF323282EFCCB8E36FE52FA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_F9ECA2326EF386AA441ECB8E36FE03F0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameAxis_B6A3BF9B0BF323282EFCCB8E36FE52FA" xlink:to="loc_us-gaap_PlanNameDomain_F9ECA2326EF386AA441ECB8E36FE03F0" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_StockPlans20002008And2009Member" xlink:label="loc_ftnt_StockPlans20002008And2009Member_6E4138D4CCF593D124C2CB8E36FE940E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameDomain_F9ECA2326EF386AA441ECB8E36FE03F0" xlink:to="loc_ftnt_StockPlans20002008And2009Member_6E4138D4CCF593D124C2CB8E36FE940E" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_StockPlan2000Member" xlink:label="loc_ftnt_StockPlan2000Member_B86CDC5E62773D21377FCB8E36FE4EDF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_StockPlans20002008And2009Member_6E4138D4CCF593D124C2CB8E36FE940E" xlink:to="loc_ftnt_StockPlan2000Member_B86CDC5E62773D21377FCB8E36FE4EDF" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_StockPlan2008Member" xlink:label="loc_ftnt_StockPlan2008Member_A84BE97B0F25DB6FF416CB8E37003F42" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_StockPlans20002008And2009Member_6E4138D4CCF593D124C2CB8E36FE940E" xlink:to="loc_ftnt_StockPlan2008Member_A84BE97B0F25DB6FF416CB8E37003F42" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_StockPlan2009Member" xlink:label="loc_ftnt_StockPlan2009Member_848615D72A9DBC7F5270CB8E37003E85" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_StockPlans20002008And2009Member_6E4138D4CCF593D124C2CB8E36FE940E" xlink:to="loc_ftnt_StockPlan2009Member_848615D72A9DBC7F5270CB8E37003E85" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_741E30B7A6D07BF4226BCB8E37000411" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_73EA63C65998EBA03A6ECB8E36FDE261" xlink:to="loc_us-gaap_AwardTypeAxis_741E30B7A6D07BF4226BCB8E37000411" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E0E669C6721CDC9E274BCB8E3700602A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_741E30B7A6D07BF4226BCB8E37000411" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E0E669C6721CDC9E274BCB8E3700602A" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_StockOptionsNonqualifyingMember" xlink:label="loc_ftnt_StockOptionsNonqualifyingMember_D8C7F43D4A0B0DCB75E3CB8E37006DF5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E0E669C6721CDC9E274BCB8E3700602A" xlink:to="loc_ftnt_StockOptionsNonqualifyingMember_D8C7F43D4A0B0DCB75E3CB8E37006DF5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_6088BF93BB4FD936D9ACCB8E37008AB9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E0E669C6721CDC9E274BCB8E3700602A" xlink:to="loc_us-gaap_EmployeeStockOptionMember_6088BF93BB4FD936D9ACCB8E37008AB9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockMember" xlink:label="loc_us-gaap_EmployeeStockMember_0D676F8B0B9EEE329374CB8E37004845" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E0E669C6721CDC9E274BCB8E3700602A" xlink:to="loc_us-gaap_EmployeeStockMember_0D676F8B0B9EEE329374CB8E37004845" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_StockOptionsAndRestrictedStockUnitsOutstandingMember" xlink:label="loc_ftnt_StockOptionsAndRestrictedStockUnitsOutstandingMember_A18058BD3993606B884CCB8E3700A04F" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E0E669C6721CDC9E274BCB8E3700602A" xlink:to="loc_ftnt_StockOptionsAndRestrictedStockUnitsOutstandingMember_A18058BD3993606B884CCB8E3700A04F" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ReservedForFutureOptionRestrictedStockUnitAndOtherEquityAwardGrantsMember" xlink:label="loc_ftnt_ReservedForFutureOptionRestrictedStockUnitAndOtherEquityAwardGrantsMember_7EA98C480B2D10F32B7DCB8E37006DF0" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E0E669C6721CDC9E274BCB8E3700602A" xlink:to="loc_ftnt_ReservedForFutureOptionRestrictedStockUnitAndOtherEquityAwardGrantsMember_7EA98C480B2D10F32B7DCB8E37006DF0" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ReservedForFutureEsppIssuancesMember" xlink:label="loc_ftnt_ReservedForFutureEsppIssuancesMember_E73215AAE483DE99C0F7CB8E370049A9" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E0E669C6721CDC9E274BCB8E3700602A" xlink:to="loc_ftnt_ReservedForFutureEsppIssuancesMember_E73215AAE483DE99C0F7CB8E370049A9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_73EA63C65998EBA03A6ECB8E36FDE261" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_BDC9A29407D1EC07402ACB8E3700C9C2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_BDC9A29407D1EC07402ACB8E3700C9C2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_60C2D2A3D3225E66B73ECB8E3700D210" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_60C2D2A3D3225E66B73ECB8E3700D210" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumExericsePriceAsPercentOfFairValueOnGrantDate" xlink:label="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumExericsePriceAsPercentOfFairValueOnGrantDate_0DFF902DCBBFF2939D5DCB8E370051D9" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumExericsePriceAsPercentOfFairValueOnGrantDate_0DFF902DCBBFF2939D5DCB8E370051D9" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumStockOwnershipPercentTriggeringEarlyAwardExpiration" xlink:label="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumStockOwnershipPercentTriggeringEarlyAwardExpiration_7FE761DAC1E3699190ADCB8E37001E07" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumStockOwnershipPercentTriggeringEarlyAwardExpiration_7FE761DAC1E3699190ADCB8E37001E07" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardExpirationPeriod" xlink:label="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardExpirationPeriod_FE5F27040520496930F0CB8E3701A9E5" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardExpirationPeriod_FE5F27040520496930F0CB8E3701A9E5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_E00A5164D4E3834416E3CB8E37012937" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_E00A5164D4E3834416E3CB8E37012937" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedBeforeAdjustments" xlink:label="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedBeforeAdjustments_2A3B025E9F9B496D2424CB8E37012B31" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedBeforeAdjustments_2A3B025E9F9B496D2424CB8E37012B31" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseToNumberOfSharesAuthorizedPerOriginalPlanTermsMaximum" xlink:label="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseToNumberOfSharesAuthorizedPerOriginalPlanTermsMaximum_CB62392A156D57CA8703CB8E37018FAD" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseToNumberOfSharesAuthorizedPerOriginalPlanTermsMaximum_CB62392A156D57CA8703CB8E37018FAD" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseToNumberOfSharesAuthorizedPerOriginalPlanTermsMaximumPercent" xlink:label="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseToNumberOfSharesAuthorizedPerOriginalPlanTermsMaximumPercent_8A4DC6090AF9A647A344CB8E3701C108" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseToNumberOfSharesAuthorizedPerOriginalPlanTermsMaximumPercent_8A4DC6090AF9A647A344CB8E3701C108" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumStockOwnershipPercentForOptionsGrantedToIndividuals" xlink:label="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumStockOwnershipPercentForOptionsGrantedToIndividuals_65C80AE940FF569E35FECB8E3701E324" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumStockOwnershipPercentForOptionsGrantedToIndividuals_65C80AE940FF569E35FECB8E3701E324" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_92B8ECB5C9E968323596CB8E370109E4" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_92B8ECB5C9E968323596CB8E370109E4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_C7CC1673FFF021A3D498CB8E3701E9B2" xlink:type="locator" />
    <presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_C7CC1673FFF021A3D498CB8E3701E9B2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_4C2C69A051F3789DA3EACB8E37013BFB" xlink:type="locator" />
    <presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_4C2C69A051F3789DA3EACB8E37013BFB" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_PurchasePriceOfCommonStockAsPercentageOfLowerOfFairMarketValueOfCommonStockOnFirstDayOfOfferingPeriodOrLastDayOfPurchasePeriod" xlink:label="loc_ftnt_PurchasePriceOfCommonStockAsPercentageOfLowerOfFairMarketValueOfCommonStockOnFirstDayOfOfferingPeriodOrLastDayOfPurchasePeriod_FC437D20C458355F2FE6CB8E3701A009" xlink:type="locator" />
    <presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_ftnt_PurchasePriceOfCommonStockAsPercentageOfLowerOfFairMarketValueOfCommonStockOnFirstDayOfOfferingPeriodOrLastDayOfPurchasePeriod_FC437D20C458355F2FE6CB8E3701A009" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_206118FD82A0378BEEC8CB8E3701A5E0" xlink:type="locator" />
    <presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_206118FD82A0378BEEC8CB8E3701A5E0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_F78BD98290FCAE1BDF25CB8E370106D7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_206118FD82A0378BEEC8CB8E3701A5E0" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_F78BD98290FCAE1BDF25CB8E370106D7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_3685EBF10A2F08890298CB8E3701333E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_206118FD82A0378BEEC8CB8E3701A5E0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_3685EBF10A2F08890298CB8E3701333E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_044AD1934C5BFD92BDDECB8E3701AA26" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_206118FD82A0378BEEC8CB8E3701A5E0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_044AD1934C5BFD92BDDECB8E3701AA26" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_252E05FC20E052CB024BCB8E3701D07D" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_206118FD82A0378BEEC8CB8E3701A5E0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_252E05FC20E052CB024BCB8E3701D07D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_B3AA33D470FB2DD3BA0FCB8E37010D88" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_206118FD82A0378BEEC8CB8E3701A5E0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_B3AA33D470FB2DD3BA0FCB8E37010D88" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_C4D135A3FB52A5AF3C0CCB8E3701FF07" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_206118FD82A0378BEEC8CB8E3701A5E0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_C4D135A3FB52A5AF3C0CCB8E3701FF07" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_19B94A94D5ABDB60984FCB8E370280D4" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_206118FD82A0378BEEC8CB8E3701A5E0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_19B94A94D5ABDB60984FCB8E370280D4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_971178B58A763501DEDFCB8E370251BD" xlink:type="locator" />
    <presentationArc order="16" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_971178B58A763501DEDFCB8E370251BD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_FF63EC21D8F0A2CC57DFCB8E370263B3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_971178B58A763501DEDFCB8E370251BD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_FF63EC21D8F0A2CC57DFCB8E370263B3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_1928A5DB90676CC8A4F5CB8E3702FB41" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_971178B58A763501DEDFCB8E370251BD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_1928A5DB90676CC8A4F5CB8E3702FB41" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_E3E8EEFB59F178CB1955CB8E37027E40" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_971178B58A763501DEDFCB8E370251BD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_E3E8EEFB59F178CB1955CB8E37027E40" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_992FFDE001720B4EED46CB8E37023350" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_971178B58A763501DEDFCB8E370251BD" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_992FFDE001720B4EED46CB8E37023350" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_1B229273F2BE78C2B414CB8E3702D335" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_971178B58A763501DEDFCB8E370251BD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_1B229273F2BE78C2B414CB8E3702D335" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_B7F10446FCD47FD704DFCB8E370263A8" xlink:type="locator" />
    <presentationArc order="17" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_B7F10446FCD47FD704DFCB8E370263A8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_E3BA7C2B8D0174237879CB8E37026C26" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_B7F10446FCD47FD704DFCB8E370263A8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_E3BA7C2B8D0174237879CB8E37026C26" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_F21695F9C1AE09E757A5CB8E3702A7DE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_B7F10446FCD47FD704DFCB8E370263A8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_F21695F9C1AE09E757A5CB8E3702A7DE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_8891796CF32DECD71BE8CB8E3702B28D" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_B7F10446FCD47FD704DFCB8E370263A8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_8891796CF32DECD71BE8CB8E3702B28D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_AF1CAC932CC12EEB4178CB8E37021710" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_B7F10446FCD47FD704DFCB8E370263A8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_AF1CAC932CC12EEB4178CB8E37021710" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_1C6BEDE9A4B9E243C05DCB8E37026B99" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_B7F10446FCD47FD704DFCB8E370263A8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_1C6BEDE9A4B9E243C05DCB8E37026B99" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_8715BDF0081C76D7B01BCB8E3702FCF4" xlink:type="locator" />
    <presentationArc order="18" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_8715BDF0081C76D7B01BCB8E3702FCF4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_38243C1BC530F13EBE91CB8E370241E0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_8715BDF0081C76D7B01BCB8E3702FCF4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_38243C1BC530F13EBE91CB8E370241E0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_F650BF955ABC8BD670C7CB8E370363B9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_8715BDF0081C76D7B01BCB8E3702FCF4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_F650BF955ABC8BD670C7CB8E370363B9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_68F27C6535BFA8C72C63CB8E3703934F" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_8715BDF0081C76D7B01BCB8E3702FCF4" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_68F27C6535BFA8C72C63CB8E3703934F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_55B6B520595A435374B4CB8E3703EE3B" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_8715BDF0081C76D7B01BCB8E3702FCF4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_55B6B520595A435374B4CB8E3703EE3B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_85872D2CF901E7C59491CB8E3703D8CC" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_8715BDF0081C76D7B01BCB8E3702FCF4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_85872D2CF901E7C59491CB8E3703D8CC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_3353A4BA98EA89EE7240CB8E3703E967" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_8715BDF0081C76D7B01BCB8E3702FCF4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_3353A4BA98EA89EE7240CB8E3703E967" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_5945B8A7D764A9A6BD86CB8E3703E413" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_8715BDF0081C76D7B01BCB8E3702FCF4" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_5945B8A7D764A9A6BD86CB8E3703E413" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_A5E43CF2605B447B6B87CB8E3703A252" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_8715BDF0081C76D7B01BCB8E3702FCF4" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_A5E43CF2605B447B6B87CB8E3703A252" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_BC51E80DD06ACA7CF97BCB8E370328D5" xlink:type="locator" />
    <presentationArc order="19" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_BC51E80DD06ACA7CF97BCB8E370328D5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_809FB5396F46710A4178CB8E3703BB36" xlink:type="locator" />
    <presentationArc order="20" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_809FB5396F46710A4178CB8E3703BB36" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_E7FFD9DF56B4F41A4ACFCB8E37031634" xlink:type="locator" />
    <presentationArc order="21" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_E7FFD9DF56B4F41A4ACFCB8E37031634" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_BBE2F054719024DC4C53CB8E37033779" xlink:type="locator" />
    <presentationArc order="22" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_BBE2F054719024DC4C53CB8E37033779" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_98C885FA99828520B1F1CB8E3703070F" xlink:type="locator" />
    <presentationArc order="23" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_49C0B946C35517F3EAA0CB8E37000EE9" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_98C885FA99828520B1F1CB8E3703070F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/StockholdersEquityEsppInformationDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_1B2B429C62D271C6C2567F0A261114DC" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_EDE160CBF3E9533DBA3A7F0A26113AA7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_1B2B429C62D271C6C2567F0A261114DC" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_EDE160CBF3E9533DBA3A7F0A26113AA7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_0D31B84CBE7099F7240A7F0A2611D905" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_EDE160CBF3E9533DBA3A7F0A26113AA7" xlink:to="loc_us-gaap_AwardTypeAxis_0D31B84CBE7099F7240A7F0A2611D905" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_09C190EC67C2B768C1BF7F0A2611198A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_0D31B84CBE7099F7240A7F0A2611D905" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_09C190EC67C2B768C1BF7F0A2611198A" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_EmployeeStockPurchasePlanMember" xlink:label="loc_ftnt_EmployeeStockPurchasePlanMember_E6DE90FF6C5280A2D01B7F0A2611CFCF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_09C190EC67C2B768C1BF7F0A2611198A" xlink:to="loc_ftnt_EmployeeStockPurchasePlanMember_E6DE90FF6C5280A2D01B7F0A2611CFCF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ACB18273E6E6EABBC7777F0A2611970C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_EDE160CBF3E9533DBA3A7F0A26113AA7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ACB18273E6E6EABBC7777F0A2611970C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_CE6489C1A3493F82AC5D7F0A26117DD5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ACB18273E6E6EABBC7777F0A2611970C" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_CE6489C1A3493F82AC5D7F0A26117DD5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_AAA69F27DBBD7268E9E67F0A261129B6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ACB18273E6E6EABBC7777F0A2611970C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_AAA69F27DBBD7268E9E67F0A261129B6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_53D468033C408376E4FA7F0A26112F89" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ACB18273E6E6EABBC7777F0A2611970C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_53D468033C408376E4FA7F0A26112F89" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_417810B7BD55DB7D30237F0A2611C556" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ACB18273E6E6EABBC7777F0A2611970C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_417810B7BD55DB7D30237F0A2611C556" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_930E7DB1F2EC39791F487F0A26111B19" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ACB18273E6E6EABBC7777F0A2611970C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_930E7DB1F2EC39791F487F0A26111B19" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_B12E3AB58949E793909B7F0A2612B763" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ACB18273E6E6EABBC7777F0A2611970C" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_B12E3AB58949E793909B7F0A2612B763" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIssuedWeightedAveragePricePerShare" xlink:label="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIssuedWeightedAveragePricePerShare_57C8D0BAF89357B0DB857F0A261279B8" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ACB18273E6E6EABBC7777F0A2611970C" xlink:to="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIssuedWeightedAveragePricePerShare_57C8D0BAF89357B0DB857F0A261279B8" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/StockholdersEquityPerformanceStockUnitsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_F58CE9418D097CAE72257F0A2622CED7" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_B266709B9802B9ED50187F0A26226D85" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_F58CE9418D097CAE72257F0A2622CED7" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_B266709B9802B9ED50187F0A26226D85" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_4B8CCE617B84857CAA587F0A2622B568" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_B266709B9802B9ED50187F0A26226D85" xlink:to="loc_us-gaap_AwardTypeAxis_4B8CCE617B84857CAA587F0A2622B568" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0B16A647EF057138E6E57F0A26220CEA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_4B8CCE617B84857CAA587F0A2622B568" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0B16A647EF057138E6E57F0A26220CEA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PerformanceSharesMember" xlink:label="loc_us-gaap_PerformanceSharesMember_8B336F0FFD1E3845225B7F0A262201F7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0B16A647EF057138E6E57F0A26220CEA" xlink:to="loc_us-gaap_PerformanceSharesMember_8B336F0FFD1E3845225B7F0A262201F7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_21D3ADF5EB3747D8DBBE7F0A2622722E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_B266709B9802B9ED50187F0A26226D85" xlink:to="loc_us-gaap_RangeAxis_21D3ADF5EB3747D8DBBE7F0A2622722E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_DF17FEE0F0225170E5F07F0A26227FA5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_21D3ADF5EB3747D8DBBE7F0A2622722E" xlink:to="loc_us-gaap_RangeMember_DF17FEE0F0225170E5F07F0A26227FA5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_7A1EEC41849D7B9CE1C37F0A2622E683" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_DF17FEE0F0225170E5F07F0A26227FA5" xlink:to="loc_us-gaap_MinimumMember_7A1EEC41849D7B9CE1C37F0A2622E683" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_F62227873CF153E340F77F0A2622EE05" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_DF17FEE0F0225170E5F07F0A26227FA5" xlink:to="loc_us-gaap_MaximumMember_F62227873CF153E340F77F0A2622EE05" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7DFAB9256D6AD314C8A47F0A2622C810" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_B266709B9802B9ED50187F0A26226D85" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7DFAB9256D6AD314C8A47F0A2622C810" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsSettlementRange" xlink:label="loc_ftnt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsSettlementRange_3BA8225B479BFCB054497F0A26228EA9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7DFAB9256D6AD314C8A47F0A2622C810" xlink:to="loc_ftnt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsSettlementRange_3BA8225B479BFCB054497F0A26228EA9" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_PerformanceShareWeightedAverageAssumptionsAbstract" xlink:label="loc_ftnt_PerformanceShareWeightedAverageAssumptionsAbstract_1811AC8EADCA12A3EB2C7F0A26230CF6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7DFAB9256D6AD314C8A47F0A2622C810" xlink:to="loc_ftnt_PerformanceShareWeightedAverageAssumptionsAbstract_1811AC8EADCA12A3EB2C7F0A26230CF6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_7CBB9DA626E6BDBA810C7F0A262343B1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_PerformanceShareWeightedAverageAssumptionsAbstract_1811AC8EADCA12A3EB2C7F0A26230CF6" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_7CBB9DA626E6BDBA810C7F0A262343B1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_353FE9910685F2A1BD3C7F0A26233255" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_PerformanceShareWeightedAverageAssumptionsAbstract_1811AC8EADCA12A3EB2C7F0A26230CF6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_353FE9910685F2A1BD3C7F0A26233255" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_BAFE16A568320B954CD27F0A2623CCD4" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_PerformanceShareWeightedAverageAssumptionsAbstract_1811AC8EADCA12A3EB2C7F0A26230CF6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_BAFE16A568320B954CD27F0A2623CCD4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_D67E6CE3C34BBD5E08B27F0A262304F0" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_PerformanceShareWeightedAverageAssumptionsAbstract_1811AC8EADCA12A3EB2C7F0A26230CF6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_D67E6CE3C34BBD5E08B27F0A262304F0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_C296E12FC983C1E96C4B7F0A2623919F" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7DFAB9256D6AD314C8A47F0A2622C810" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_C296E12FC983C1E96C4B7F0A2623919F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_8CE4CF321B1ADDDAF4637F0A2623B12C" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7DFAB9256D6AD314C8A47F0A2622C810" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_8CE4CF321B1ADDDAF4637F0A2623B12C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_DAC5A5039472E02E41557F0A2623F2E8" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7DFAB9256D6AD314C8A47F0A2622C810" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_DAC5A5039472E02E41557F0A2623F2E8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_18CCB188C58B1F9E907D7F0A26232575" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7DFAB9256D6AD314C8A47F0A2622C810" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_18CCB188C58B1F9E907D7F0A26232575" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_258E82570D217622A7897F0A2623D32B" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7DFAB9256D6AD314C8A47F0A2622C810" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_258E82570D217622A7897F0A2623D32B" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/StockholdersEquityRangeOfOptionsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_1D5DC359A8AAED0ABC2E60D6A5B8C5F7" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_B02BC81A7D7A98F07E0260D6A5B8DB41" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_1D5DC359A8AAED0ABC2E60D6A5B8C5F7" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_B02BC81A7D7A98F07E0260D6A5B8DB41" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_061F25E6E38F967C655960D6A5B81FE8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_B02BC81A7D7A98F07E0260D6A5B8DB41" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_061F25E6E38F967C655960D6A5B81FE8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_25E53A0B5D3E54A5A89960D6A5B85FF1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_061F25E6E38F967C655960D6A5B81FE8" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_25E53A0B5D3E54A5A89960D6A5B85FF1" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_Range0.98to1.20Member" xlink:label="loc_ftnt_Range0.98to1.20Member_AB49D89FA0C825FC003860D6A5B92479" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_25E53A0B5D3E54A5A89960D6A5B85FF1" xlink:to="loc_ftnt_Range0.98to1.20Member_AB49D89FA0C825FC003860D6A5B92479" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_Range372To465Member" xlink:label="loc_ftnt_Range372To465Member_A250CEFE301780F5F10B60D6A5B9EE3A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_25E53A0B5D3E54A5A89960D6A5B85FF1" xlink:to="loc_ftnt_Range372To465Member_A250CEFE301780F5F10B60D6A5B9EE3A" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_Range550To625Member" xlink:label="loc_ftnt_Range550To625Member_AFFFE87417114AF77A4560D6A5B91352" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_25E53A0B5D3E54A5A89960D6A5B85FF1" xlink:to="loc_ftnt_Range550To625Member_AFFFE87417114AF77A4560D6A5B91352" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_Range843To899Member" xlink:label="loc_ftnt_Range843To899Member_9D38A687FECBC185F5B560D6A5B9064D" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_25E53A0B5D3E54A5A89960D6A5B85FF1" xlink:to="loc_ftnt_Range843To899Member_9D38A687FECBC185F5B560D6A5B9064D" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_Range15.28to19.94Member" xlink:label="loc_ftnt_Range15.28to19.94Member_D0CADF474B1418140F5460D6A5B9D80C" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_25E53A0B5D3E54A5A89960D6A5B85FF1" xlink:to="loc_ftnt_Range15.28to19.94Member_D0CADF474B1418140F5460D6A5B9D80C" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_Range2013To2396Member" xlink:label="loc_ftnt_Range2013To2396Member_1214F514467B4357D74D60D6A5B9B05A" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_25E53A0B5D3E54A5A89960D6A5B85FF1" xlink:to="loc_ftnt_Range2013To2396Member_1214F514467B4357D74D60D6A5B9B05A" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_Range26.49to26.70Member" xlink:label="loc_ftnt_Range26.49to26.70Member_BC7A3418F862AC07385E60D6A5B9BE7E" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_25E53A0B5D3E54A5A89960D6A5B85FF1" xlink:to="loc_ftnt_Range26.49to26.70Member_BC7A3418F862AC07385E60D6A5B9BE7E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_A36CBDA27C168B781BDE60D6A5B99D68" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_B02BC81A7D7A98F07E0260D6A5B8DB41" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_A36CBDA27C168B781BDE60D6A5B99D68" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_A8AA25C2D4B3C6FB0B0860D6A5B9CD6C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_A36CBDA27C168B781BDE60D6A5B99D68" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_A8AA25C2D4B3C6FB0B0860D6A5B9CD6C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_4CE385FFB7263C0A398C60D6A5B94C84" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_A36CBDA27C168B781BDE60D6A5B99D68" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_4CE385FFB7263C0A398C60D6A5B94C84" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_762277F7995C4BB1F06560D6A5B95DBC" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_A36CBDA27C168B781BDE60D6A5B99D68" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_762277F7995C4BB1F06560D6A5B95DBC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_9F3E08C5D82AE1DD177E60D6A5B951DE" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_A36CBDA27C168B781BDE60D6A5B99D68" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_9F3E08C5D82AE1DD177E60D6A5B951DE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_355F7A40940BB08EE01760D6A5B98B0E" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_A36CBDA27C168B781BDE60D6A5B99D68" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_355F7A40940BB08EE01760D6A5B98B0E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_0724631B80126A22283260D6A5B90EC8" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_A36CBDA27C168B781BDE60D6A5B99D68" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_0724631B80126A22283260D6A5B90EC8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_6FF476ECC4952C08854660D6A5B994B8" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_A36CBDA27C168B781BDE60D6A5B99D68" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_6FF476ECC4952C08854660D6A5B994B8" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/StockholdersEquityRestrictedStockUnitsActivityDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_23BBB347E43265B9509B60D6A5B1FB1D" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_FC36F658A0762B0F01DC60D6A5B10529" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_23BBB347E43265B9509B60D6A5B1FB1D" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_FC36F658A0762B0F01DC60D6A5B10529" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_9BA0B8C656FE61D190B260D6A5B1A8DE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_FC36F658A0762B0F01DC60D6A5B10529" xlink:to="loc_us-gaap_AwardTypeAxis_9BA0B8C656FE61D190B260D6A5B1A8DE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7207E851E905AC15E7A460D6A5B1D0B1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_9BA0B8C656FE61D190B260D6A5B1A8DE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7207E851E905AC15E7A460D6A5B1D0B1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_8936A91A0E74713C2ACB60D6A5B1E0A3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7207E851E905AC15E7A460D6A5B1D0B1" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_8936A91A0E74713C2ACB60D6A5B1E0A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2F721B17622C0C6811F760D6A5B39A45" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_FC36F658A0762B0F01DC60D6A5B10529" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2F721B17622C0C6811F760D6A5B39A45" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_DFC943E0EFA9E8B4EB3D60D6A5B3797D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2F721B17622C0C6811F760D6A5B39A45" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_DFC943E0EFA9E8B4EB3D60D6A5B3797D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_078E9FB2A0F9F838EC5860D6A5B38EEB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_DFC943E0EFA9E8B4EB3D60D6A5B3797D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_078E9FB2A0F9F838EC5860D6A5B38EEB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_F1D130D5B081E491054C60D6A5B389EB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_DFC943E0EFA9E8B4EB3D60D6A5B3797D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_F1D130D5B081E491054C60D6A5B389EB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_1B9760F477359952D21560D6A5B3F6C2" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_DFC943E0EFA9E8B4EB3D60D6A5B3797D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_1B9760F477359952D21560D6A5B3F6C2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_3830E961CEB428F789D660D6A5B3084D" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_DFC943E0EFA9E8B4EB3D60D6A5B3797D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_3830E961CEB428F789D660D6A5B3084D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_96108CADC2389DFF974E60D6A5B38595" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_DFC943E0EFA9E8B4EB3D60D6A5B3797D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_96108CADC2389DFF974E60D6A5B38595" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVest" xlink:label="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVest_542B505868A84CDD179E60D6A5B337B0" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2F721B17622C0C6811F760D6A5B39A45" xlink:to="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVest_542B505868A84CDD179E60D6A5B337B0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_859782F93551111846B160D6A5B33F6A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2F721B17622C0C6811F760D6A5B39A45" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_859782F93551111846B160D6A5B33F6A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_31DCBFC374B79284BEC060D6A5B35A68" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_859782F93551111846B160D6A5B33F6A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_31DCBFC374B79284BEC060D6A5B35A68" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_BB9FD92D8FA31E5B928860D6A5B39C8E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_859782F93551111846B160D6A5B33F6A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_BB9FD92D8FA31E5B928860D6A5B39C8E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_1F0AB85F9726A731960560D6A5B3DE8E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_859782F93551111846B160D6A5B33F6A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_1F0AB85F9726A731960560D6A5B3DE8E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_F82BD5EAE99A5260D24160D6A5B39128" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_859782F93551111846B160D6A5B33F6A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_F82BD5EAE99A5260D24160D6A5B39128" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_32316CA766749023143760D6A5B3D7E1" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_859782F93551111846B160D6A5B33F6A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_32316CA766749023143760D6A5B3D7E1" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageGrantDateFairValue" xlink:label="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageGrantDateFairValue_7C248F1D211A3633A60460D6A5B3FF09" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2F721B17622C0C6811F760D6A5B39A45" xlink:to="loc_ftnt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageGrantDateFairValue_7C248F1D211A3633A60460D6A5B3FF09" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_DF3EA516B166244554D660D6A5B40ECE" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2F721B17622C0C6811F760D6A5B39A45" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_DF3EA516B166244554D660D6A5B40ECE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_0E484B792C7C84019D7860D6A5B49174" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2F721B17622C0C6811F760D6A5B39A45" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_0E484B792C7C84019D7860D6A5B49174" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_F073A8B28244383AF82E60D6A5B4C1BD" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2F721B17622C0C6811F760D6A5B39A45" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_F073A8B28244383AF82E60D6A5B4C1BD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_923E60F03BC2E50E937760D6A5B4A5B6" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2F721B17622C0C6811F760D6A5B39A45" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_923E60F03BC2E50E937760D6A5B4A5B6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/StockholdersEquityShareRepurchaseProgramDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_517884E649E1850430E7CC412583A03B" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_E1D59397FA07B8917A01CC64E7DC777E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_517884E649E1850430E7CC412583A03B" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_E1D59397FA07B8917A01CC64E7DC777E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_42249FD9F307A1DFB95DCC650CCD3953" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_E1D59397FA07B8917A01CC64E7DC777E" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_42249FD9F307A1DFB95DCC650CCD3953" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_2295EAB3E761822697F4CC66A5916602" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_42249FD9F307A1DFB95DCC650CCD3953" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_2295EAB3E761822697F4CC66A5916602" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ShareRepurchaseProgramMember" xlink:label="loc_ftnt_ShareRepurchaseProgramMember_0574D316F942737112C5CC663EABF111" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_2295EAB3E761822697F4CC66A5916602" xlink:to="loc_ftnt_ShareRepurchaseProgramMember_0574D316F942737112C5CC663EABF111" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FF04A9FE5BA39D87D007CC64E7E1C44B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_E1D59397FA07B8917A01CC64E7DC777E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FF04A9FE5BA39D87D007CC64E7E1C44B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_3AEE51871164AFDECA6CCC4125834256" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FF04A9FE5BA39D87D007CC64E7E1C44B" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_3AEE51871164AFDECA6CCC4125834256" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_0BA7F82EF26DA515F936CC4125834915" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FF04A9FE5BA39D87D007CC64E7E1C44B" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_0BA7F82EF26DA515F936CC4125834915" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_48458038E0EA2C10332CCC41258444B9" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FF04A9FE5BA39D87D007CC64E7E1C44B" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_48458038E0EA2C10332CCC41258444B9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_D7F96A82631AA60FED0ECC4125841346" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FF04A9FE5BA39D87D007CC64E7E1C44B" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_D7F96A82631AA60FED0ECC4125841346" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/StockholdersEquityTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_B4FAB62937A1AF706A2ECC9D761CBD49" xlink:type="locator" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsAndAllocationOfRecognizedPeriodCostsTableTextBlock" xlink:label="loc_ftnt_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsAndAllocationOfRecognizedPeriodCostsTableTextBlock_61BCB3ACE88B8EDC68D4CC9D761D22F7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_B4FAB62937A1AF706A2ECC9D761CBD49" xlink:to="loc_ftnt_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsAndAllocationOfRecognizedPeriodCostsTableTextBlock_61BCB3ACE88B8EDC68D4CC9D761D22F7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_8F417F90F30887760377CC9D761D4E4D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_B4FAB62937A1AF706A2ECC9D761CBD49" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_8F417F90F30887760377CC9D761D4E4D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock_FD823092FA26213C8F50CC9D761DE7DB" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_B4FAB62937A1AF706A2ECC9D761CBD49" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock_FD823092FA26213C8F50CC9D761DE7DB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_E64D9C8A8D1319753C12CC9D761DA623" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_B4FAB62937A1AF706A2ECC9D761CBD49" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_E64D9C8A8D1319753C12CC9D761DA623" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ScheduleofSharebasedCompensationSharesWithheldforTaxesTableTextBlock" xlink:label="loc_ftnt_ScheduleofSharebasedCompensationSharesWithheldforTaxesTableTextBlock_57AF7EF0408103EF7029CC9D761D4459" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_B4FAB62937A1AF706A2ECC9D761CBD49" xlink:to="loc_ftnt_ScheduleofSharebasedCompensationSharesWithheldforTaxesTableTextBlock_57AF7EF0408103EF7029CC9D761D4459" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ScheduleofSharebasedPaymentAwardEquityInstrumentsOtherthanOptionsValuationAssumptionsTableTextBlock" xlink:label="loc_ftnt_ScheduleofSharebasedPaymentAwardEquityInstrumentsOtherthanOptionsValuationAssumptionsTableTextBlock_0D32F07A51A87FF20BF4CC9D761D1D66" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_B4FAB62937A1AF706A2ECC9D761CBD49" xlink:to="loc_ftnt_ScheduleofSharebasedPaymentAwardEquityInstrumentsOtherthanOptionsValuationAssumptionsTableTextBlock_0D32F07A51A87FF20BF4CC9D761D1D66" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ScheduleOfSharesReservedForFutureIssuanceTableTextBlock" xlink:label="loc_ftnt_ScheduleOfSharesReservedForFutureIssuanceTableTextBlock_3533EF151F9DB6F3B63ECC9D761DB2C5" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_B4FAB62937A1AF706A2ECC9D761CBD49" xlink:to="loc_ftnt_ScheduleOfSharesReservedForFutureIssuanceTableTextBlock_3533EF151F9DB6F3B63ECC9D761DB2C5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_AD8548D9CE98AFF39DCECC9D761D2FAE" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_B4FAB62937A1AF706A2ECC9D761CBD49" xlink:to="loc_us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_AD8548D9CE98AFF39DCECC9D761D2FAE" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ScheduleofSharebasedPaymentAwardEmployeeStockPurchasePlanAdditionalInformationTableTextBlock" xlink:label="loc_ftnt_ScheduleofSharebasedPaymentAwardEmployeeStockPurchasePlanAdditionalInformationTableTextBlock_87CE62EB154ADDA8E05FCCAEEC5AACB2" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_B4FAB62937A1AF706A2ECC9D761CBD49" xlink:to="loc_ftnt_ScheduleofSharebasedPaymentAwardEmployeeStockPurchasePlanAdditionalInformationTableTextBlock_87CE62EB154ADDA8E05FCCAEEC5AACB2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_99432A95212492FCA516CC9D761D895B" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_B4FAB62937A1AF706A2ECC9D761CBD49" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_99432A95212492FCA516CC9D761D895B" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ScheduleofEmployeeServiceSharebasedCompensationAllocationofRecognizedPeriodCostsbyAwardTypeTableTextBlock" xlink:label="loc_ftnt_ScheduleofEmployeeServiceSharebasedCompensationAllocationofRecognizedPeriodCostsbyAwardTypeTableTextBlock_A5610DFB0779B93DDAF4CCB123EA9A01" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_B4FAB62937A1AF706A2ECC9D761CBD49" xlink:to="loc_ftnt_ScheduleofEmployeeServiceSharebasedCompensationAllocationofRecognizedPeriodCostsbyAwardTypeTableTextBlock_A5610DFB0779B93DDAF4CCB123EA9A01" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_IncomeTaxBenefitFromStockOptionPlansTableTextBlock" xlink:label="loc_ftnt_IncomeTaxBenefitFromStockOptionPlansTableTextBlock_1ED1818DD49447B897B5CC9D761DD24C" xlink:type="locator" />
    <presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_B4FAB62937A1AF706A2ECC9D761CBD49" xlink:to="loc_ftnt_IncomeTaxBenefitFromStockOptionPlansTableTextBlock_1ED1818DD49447B897B5CC9D761DD24C" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SummaryOfSignificantAccountingPolicies" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_B9825A4DB7A2338CE46ABBCCC4DE8DCC" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:label="loc_us-gaap_SignificantAccountingPoliciesTextBlock_0E74E90CE75B95BC107FBBCCC4DE08AB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_B9825A4DB7A2338CE46ABBCCC4DE8DCC" xlink:to="loc_us-gaap_SignificantAccountingPoliciesTextBlock_0E74E90CE75B95BC107FBBCCC4DE08AB" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesAccountsReceivableDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_F9C7AFEC51EC22F06BBCC958F0936F19" xlink:type="locator" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ReserveforSalesReturns" xlink:label="loc_ftnt_ReserveforSalesReturns_9950B11B57A32E77F128C958F093A88B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_F9C7AFEC51EC22F06BBCC958F0936F19" xlink:to="loc_ftnt_ReserveforSalesReturns_9950B11B57A32E77F128C958F093A88B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_A91A09F07E96A342E640C95988B7885E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_F9C7AFEC51EC22F06BBCC958F0936F19" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_A91A09F07E96A342E640C95988B7885E" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesCashCashEquivalentsAndAvailableForSaleInvestmentsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_5E081832B953BDE9C1DFBBCCC49FB9B5" xlink:type="locator" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_InvestmentsClassificationAsShortTermMinimumOriginalMaturity" xlink:label="loc_ftnt_InvestmentsClassificationAsShortTermMinimumOriginalMaturity_AA41A8D203AAA4F43C7ABBCCC49F68F4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_5E081832B953BDE9C1DFBBCCC49FB9B5" xlink:to="loc_ftnt_InvestmentsClassificationAsShortTermMinimumOriginalMaturity_AA41A8D203AAA4F43C7ABBCCC49F68F4" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_InvestmentsClassificationAsShortTermMaximumOriginalMaturity" xlink:label="loc_ftnt_InvestmentsClassificationAsShortTermMaximumOriginalMaturity_72605A8E5100D0CF97EBBBCCC49FA7E1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_5E081832B953BDE9C1DFBBCCC49FB9B5" xlink:to="loc_ftnt_InvestmentsClassificationAsShortTermMaximumOriginalMaturity_72605A8E5100D0CF97EBBBCCC49FA7E1" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_InvestmentsClassificationAsLongTermMinimumMaturity" xlink:label="loc_ftnt_InvestmentsClassificationAsLongTermMinimumMaturity_3C4D444F78AEFF0F490DBBCCC49F3FD8" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_5E081832B953BDE9C1DFBBCCC49FB9B5" xlink:to="loc_ftnt_InvestmentsClassificationAsLongTermMinimumMaturity_3C4D444F78AEFF0F490DBBCCC49F3FD8" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesConcentrationOfCreditRiskDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_9A6017E5E2A89CC57FF4C94E7240DCC5" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskTable" xlink:label="loc_us-gaap_ConcentrationRiskTable_1388670F373905CAF015C94E72410623" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_9A6017E5E2A89CC57FF4C94E7240DCC5" xlink:to="loc_us-gaap_ConcentrationRiskTable_1388670F373905CAF015C94E72410623" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_B0E328ECC2A5216416D1C94E7241C765" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskTable_1388670F373905CAF015C94E72410623" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_B0E328ECC2A5216416D1C94E7241C765" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_EA2F54E0B4F149B5648AC94E72419E42" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_B0E328ECC2A5216416D1C94E7241C765" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_EA2F54E0B4F149B5648AC94E72419E42" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CustomerConcentrationRiskMember" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_F262C4EB5FECBA84D14DC94E724187BF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_EA2F54E0B4F149B5648AC94E72419E42" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_F262C4EB5FECBA84D14DC94E724187BF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_99E7E97C01CC0A1AE250C94E72426696" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskTable_1388670F373905CAF015C94E72410623" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_99E7E97C01CC0A1AE250C94E72426696" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_80A8ADB204BF5A86F82DC94E724244F5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_99E7E97C01CC0A1AE250C94E72426696" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_80A8ADB204BF5A86F82DC94E724244F5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountsReceivableMember" xlink:label="loc_us-gaap_AccountsReceivableMember_8B064BCB2E195C8953DDC94E7242CFEA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_80A8ADB204BF5A86F82DC94E724244F5" xlink:to="loc_us-gaap_AccountsReceivableMember_8B064BCB2E195C8953DDC94E7242CFEA" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_SalesRevenueMember" xlink:label="loc_ftnt_SalesRevenueMember_598152C1AC85C4364B1DC94E7242763F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_80A8ADB204BF5A86F82DC94E724244F5" xlink:to="loc_ftnt_SalesRevenueMember_598152C1AC85C4364B1DC94E7242763F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskLineItems" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_2D725518EAA993E3F81DC94E7242C7BA" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskTable_1388670F373905CAF015C94E72410623" xlink:to="loc_us-gaap_ConcentrationRiskLineItems_2D725518EAA993E3F81DC94E7242C7BA" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_NumberOfCustomersAccountingForTenPercentOrMoreOfConcentrationRisk" xlink:label="loc_ftnt_NumberOfCustomersAccountingForTenPercentOrMoreOfConcentrationRisk_FA82C1B64E3A7F78B454C94E72423FAB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_2D725518EAA993E3F81DC94E7242C7BA" xlink:to="loc_ftnt_NumberOfCustomersAccountingForTenPercentOrMoreOfConcentrationRisk_FA82C1B64E3A7F78B454C94E72423FAB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_C56AE7100F26E8DF3C46C94E724243C2" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_2D725518EAA993E3F81DC94E7242C7BA" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_C56AE7100F26E8DF3C46C94E724243C2" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesDerivativesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_80C266E458EB3138E82A6171117BD7CD" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DerivativeTable" xlink:label="loc_us-gaap_DerivativeTable_F017213A1A7B63F3D3F56171117BAAB1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_80C266E458EB3138E82A6171117BD7CD" xlink:to="loc_us-gaap_DerivativeTable_F017213A1A7B63F3D3F56171117BAAB1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CurrencyAxis" xlink:label="loc_us-gaap_CurrencyAxis_F8240EE3E806C064E2D161A61C3F26E6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_F017213A1A7B63F3D3F56171117BAAB1" xlink:to="loc_us-gaap_CurrencyAxis_F8240EE3E806C064E2D161A61C3F26E6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/currency/2014/currency-2014-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="loc_currency_AllCurrenciesDomain_DAC83AC1742F3696B22761A657486CBF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CurrencyAxis_F8240EE3E806C064E2D161A61C3F26E6" xlink:to="loc_currency_AllCurrenciesDomain_DAC83AC1742F3696B22761A657486CBF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/currency/2014/currency-2014-01-31.xsd#currency_CAD" xlink:label="loc_currency_CAD_C6F682C36F86C130CC8A61A67A60EA50" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_currency_AllCurrenciesDomain_DAC83AC1742F3696B22761A657486CBF" xlink:to="loc_currency_CAD_C6F682C36F86C130CC8A61A67A60EA50" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="loc_us-gaap_DerivativeLineItems_C259F765BBCE29F187946171117C6E09" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_F017213A1A7B63F3D3F56171117BAAB1" xlink:to="loc_us-gaap_DerivativeLineItems_C259F765BBCE29F187946171117C6E09" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_DerivativeNotionalAmount" xlink:label="loc_invest_DerivativeNotionalAmount_3444D97299D2947F19356171117C7797" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLineItems_C259F765BBCE29F187946171117C6E09" xlink:to="loc_invest_DerivativeNotionalAmount_3444D97299D2947F19356171117C7797" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesForeignCurrencyTranslationDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_FAE54FF7842D9279BA89BBCCC40BDD01" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_FD4E6A6305AE197E90DFBBCCC40B916A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_FAE54FF7842D9279BA89BBCCC40BDD01" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_FD4E6A6305AE197E90DFBBCCC40B916A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesGoodwillDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_C6A9C56F55E25E8E0AE6CD3AE02A4B3B" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NumberOfReportingUnits" xlink:label="loc_us-gaap_NumberOfReportingUnits_14A38DC30D45B8537549CD3B4661C3E4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_C6A9C56F55E25E8E0AE6CD3AE02A4B3B" xlink:to="loc_us-gaap_NumberOfReportingUnits_14A38DC30D45B8537549CD3B4661C3E4" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesOtherIntangibleAssetsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_D9249F0233314AAE6513BBCCC3208D36" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_DB80B565AAB54276EF0EBBCCC320C126" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_D9249F0233314AAE6513BBCCC3208D36" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_DB80B565AAB54276EF0EBBCCC320C126" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_85102C554FDE9B5231E9BBCCC320E9C9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_DB80B565AAB54276EF0EBBCCC320C126" xlink:to="loc_us-gaap_RangeAxis_85102C554FDE9B5231E9BBCCC320E9C9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_B0641D8942D893655868BBCCC320A417" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_85102C554FDE9B5231E9BBCCC320E9C9" xlink:to="loc_us-gaap_RangeMember_B0641D8942D893655868BBCCC320A417" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_1BE601419B560C63017ABBCCC3205568" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_B0641D8942D893655868BBCCC320A417" xlink:to="loc_us-gaap_MinimumMember_1BE601419B560C63017ABBCCC3205568" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_B98170C4DC9D429E3269BBCCC320B109" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_B0641D8942D893655868BBCCC320A417" xlink:to="loc_us-gaap_MaximumMember_B98170C4DC9D429E3269BBCCC320B109" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_08315624BB37B41D824CBBCCC320DA97" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_DB80B565AAB54276EF0EBBCCC320C126" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_08315624BB37B41D824CBBCCC320DA97" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_9485C39EA8D9D98E64CABBCCC320E38A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_08315624BB37B41D824CBBCCC320DA97" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_9485C39EA8D9D98E64CABBCCC320E38A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:type="locator" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_PresentationAndPreparationOfConsolidatedFinancialStatementsPolicyTextBlock" xlink:label="loc_ftnt_PresentationAndPreparationOfConsolidatedFinancialStatementsPolicyTextBlock_186B91E420A69FC64ACCC8DC8CBA8880" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_ftnt_PresentationAndPreparationOfConsolidatedFinancialStatementsPolicyTextBlock_186B91E420A69FC64ACCC8DC8CBA8880" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UseOfEstimates" xlink:label="loc_us-gaap_UseOfEstimates_7E771D9875716C046CF6C8DC8CBA04A1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_UseOfEstimates_7E771D9875716C046CF6C8DC8CBA04A1" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_CertainSignificantRisksAndUncertaintiesPolicyTextBlock" xlink:label="loc_ftnt_CertainSignificantRisksAndUncertaintiesPolicyTextBlock_29FC0B7698907B86DB60C8DC8CBA62CA" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_ftnt_CertainSignificantRisksAndUncertaintiesPolicyTextBlock_29FC0B7698907B86DB60C8DC8CBA62CA" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ConcentrationRiskPolicyTextBlock" xlink:label="loc_ftnt_ConcentrationRiskPolicyTextBlock_D376E896F60359F35E32C8DC8CBADC31" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_ftnt_ConcentrationRiskPolicyTextBlock_D376E896F60359F35E32C8DC8CBADC31" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:label="loc_us-gaap_FairValueOfFinancialInstrumentsPolicy_D17F59FD46E9ADD99E3EC8DC8CBA463A" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_FairValueOfFinancialInstrumentsPolicy_D17F59FD46E9ADD99E3EC8DC8CBA463A" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ComprehensiveIncomeLossPolicyTextBlock" xlink:label="loc_ftnt_ComprehensiveIncomeLossPolicyTextBlock_9AE23FFEA98C3619BAA3C8DC8CBBF885" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_ftnt_ComprehensiveIncomeLossPolicyTextBlock_9AE23FFEA98C3619BAA3C8DC8CBBF885" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:label="loc_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_197B01A527EAEADA746AC8DC8CBB4D1F" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_197B01A527EAEADA746AC8DC8CBB4D1F" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_CashandCashEquivalentsandAvailableforSaleInvestmentsPolicyTextBlock" xlink:label="loc_ftnt_CashandCashEquivalentsandAvailableforSaleInvestmentsPolicyTextBlock_E687FB50EDE8F7810F45C8DC8CBBDE78" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_ftnt_CashandCashEquivalentsandAvailableforSaleInvestmentsPolicyTextBlock_E687FB50EDE8F7810F45C8DC8CBBDE78" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CostMethodInvestmentsPolicy" xlink:label="loc_us-gaap_CostMethodInvestmentsPolicy_87B97C4122ECA722B46EC8DC8CBBDA96" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_CostMethodInvestmentsPolicy_87B97C4122ECA722B46EC8DC8CBBDA96" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryPolicyTextBlock" xlink:label="loc_us-gaap_InventoryPolicyTextBlock_6F2A6843F5E40C843B88C8DC8CBB1061" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_InventoryPolicyTextBlock_6F2A6843F5E40C843B88C8DC8CBB1061" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_7BF32F863CCA17AABC45C8DC8CBB1A74" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_7BF32F863CCA17AABC45C8DC8CBB1A74" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" xlink:label="loc_us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_71997EA304A61434F0E3C8DC8CBB9012" xlink:type="locator" />
    <presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_71997EA304A61434F0E3C8DC8CBB9012" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_EFF7B16E4A9B4CB38CD8C8DC8CBBF021" xlink:type="locator" />
    <presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_EFF7B16E4A9B4CB38CD8C8DC8CBBF021" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IntangibleAssetsFiniteLivedPolicy" xlink:label="loc_us-gaap_IntangibleAssetsFiniteLivedPolicy_1A30FCAA2890C6559ABFC8DC8CBB84AD" xlink:type="locator" />
    <presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_IntangibleAssetsFiniteLivedPolicy_1A30FCAA2890C6559ABFC8DC8CBB84AD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RevenueRecognitionPolicyTextBlock" xlink:label="loc_us-gaap_RevenueRecognitionPolicyTextBlock_97E835EA9D5B984C3249C8DC8CBB1013" xlink:type="locator" />
    <presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_RevenueRecognitionPolicyTextBlock_97E835EA9D5B984C3249C8DC8CBB1013" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxPolicyTextBlock" xlink:label="loc_us-gaap_IncomeTaxPolicyTextBlock_E61231302EDADCB78CBBC8DC8CBB1332" xlink:type="locator" />
    <presentationArc order="16" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_IncomeTaxPolicyTextBlock_E61231302EDADCB78CBBC8DC8CBB1332" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" xlink:label="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_723DD6EC78010658CC25C8DC8CBB0260" xlink:type="locator" />
    <presentationArc order="17" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_723DD6EC78010658CC25C8DC8CBB0260" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdvertisingCostPolicyExpensedAdvertisingCost" xlink:label="loc_us-gaap_AdvertisingCostPolicyExpensedAdvertisingCost_7FBED3B963B0EECFB187C8DC8CBBB63C" xlink:type="locator" />
    <presentationArc order="18" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_AdvertisingCostPolicyExpensedAdvertisingCost_7FBED3B963B0EECFB187C8DC8CBBB63C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ResearchAndDevelopmentExpensePolicy" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpensePolicy_C74CAFF642351F7E2DB4C8DC8CBBBB9C" xlink:type="locator" />
    <presentationArc order="19" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpensePolicy_C74CAFF642351F7E2DB4C8DC8CBBBB9C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SoftwareToBeSoldLeasedOrOtherwiseMarketedPolicy" xlink:label="loc_us-gaap_SoftwareToBeSoldLeasedOrOtherwiseMarketedPolicy_9238D067901BD98185D4C8DC8CBB3F51" xlink:type="locator" />
    <presentationArc order="20" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_SoftwareToBeSoldLeasedOrOtherwiseMarketedPolicy_9238D067901BD98185D4C8DC8CBB3F51" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TradeAndOtherAccountsReceivablePolicy" xlink:label="loc_us-gaap_TradeAndOtherAccountsReceivablePolicy_779DB17E1CC6D2ADF86EC8DC8CBB736B" xlink:type="locator" />
    <presentationArc order="21" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_TradeAndOtherAccountsReceivablePolicy_779DB17E1CC6D2ADF86EC8DC8CBB736B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StandardProductWarrantyPolicy" xlink:label="loc_us-gaap_StandardProductWarrantyPolicy_E8B47B4BCD44D180BB06C8DC8CBB54F0" xlink:type="locator" />
    <presentationArc order="22" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_StandardProductWarrantyPolicy_E8B47B4BCD44D180BB06C8DC8CBB54F0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DerivativesMethodsOfAccountingHedgingDerivatives" xlink:label="loc_us-gaap_DerivativesMethodsOfAccountingHedgingDerivatives_837B4D6BB2CCE98126B2C8DC8CBBED31" xlink:type="locator" />
    <presentationArc order="23" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_DerivativesMethodsOfAccountingHedgingDerivatives_837B4D6BB2CCE98126B2C8DC8CBBED31" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PriorPeriodReclassificationAdjustmentDescription" xlink:label="loc_us-gaap_PriorPeriodReclassificationAdjustmentDescription_B981AD47B50027E18D2AC8DC8CBC8500" xlink:type="locator" />
    <presentationArc order="24" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_PriorPeriodReclassificationAdjustmentDescription_B981AD47B50027E18D2AC8DC8CBC8500" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:label="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_BBE7DA16A380FE79BB26C8DC8CBCEFD5" xlink:type="locator" />
    <presentationArc order="25" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_EDE35D5C49266209398EC8DC8CBAC245" xlink:to="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_BBE7DA16A380FE79BB26C8DC8CBCEFD5" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesPropertyAndEquipmentDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_90A68001A3B8D5F3E0776171118B2815" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_205BA4D6FB9C2DA87C216171118B6ADE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_90A68001A3B8D5F3E0776171118B2815" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_205BA4D6FB9C2DA87C216171118B6ADE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_790CC5F645987AB7ED5361A1E203FC9D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_205BA4D6FB9C2DA87C216171118B6ADE" xlink:to="loc_us-gaap_RangeAxis_790CC5F645987AB7ED5361A1E203FC9D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_77AB8DF73EDE1DD9FB1761A1E208A527" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_790CC5F645987AB7ED5361A1E203FC9D" xlink:to="loc_us-gaap_RangeMember_77AB8DF73EDE1DD9FB1761A1E208A527" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_C278EC37A9B4A70E929161A1FD4C1F0B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_77AB8DF73EDE1DD9FB1761A1E208A527" xlink:to="loc_us-gaap_MinimumMember_C278EC37A9B4A70E929161A1FD4C1F0B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_4252002D54A13E41CA3661A240218045" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_77AB8DF73EDE1DD9FB1761A1E208A527" xlink:to="loc_us-gaap_MaximumMember_4252002D54A13E41CA3661A240218045" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_32D75FDEDAF9A93D26556171118BEB8D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_205BA4D6FB9C2DA87C216171118B6ADE" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_32D75FDEDAF9A93D26556171118BEB8D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_DF11E7192334775FC8746171118BB95A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_32D75FDEDAF9A93D26556171118BEB8D" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_DF11E7192334775FC8746171118BB95A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_45DBAF6F7E2895808C1B6171118BD879" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_DF11E7192334775FC8746171118BB95A" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_45DBAF6F7E2895808C1B6171118BD879" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_EvaluationUnitsMember" xlink:label="loc_ftnt_EvaluationUnitsMember_FA7340E43ECA315BFCA96171118B6867" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_DF11E7192334775FC8746171118BB95A" xlink:to="loc_ftnt_EvaluationUnitsMember_FA7340E43ECA315BFCA96171118B6867" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:label="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_217832CF7A2FF16F273D6171118CC1EC" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_DF11E7192334775FC8746171118BB95A" xlink:to="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_217832CF7A2FF16F273D6171118CC1EC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_B03697218C6AE31F446E6171118C794D" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_DF11E7192334775FC8746171118BB95A" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_B03697218C6AE31F446E6171118C794D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_7908343C70D99489A6076171118CE029" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_205BA4D6FB9C2DA87C216171118B6ADE" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentLineItems_7908343C70D99489A6076171118CE029" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_5E7BF4521C0F4B86EFF06171118C9349" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_7908343C70D99489A6076171118CE029" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_5E7BF4521C0F4B86EFF06171118C9349" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesRevenueRecognitionDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_CCD7BB564FEF543851AFC72A77C56A4B" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_18969C7FAA00B81F4AFDC72A77C7281C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_CCD7BB564FEF543851AFC72A77C56A4B" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_18969C7FAA00B81F4AFDC72A77C7281C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_E82BCF2BE00D5FFA0CC9C72A77C74B83" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_18969C7FAA00B81F4AFDC72A77C7281C" xlink:to="loc_us-gaap_RangeAxis_E82BCF2BE00D5FFA0CC9C72A77C74B83" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_244EFDB93903C4E4C4B4C72A77C78170" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_E82BCF2BE00D5FFA0CC9C72A77C74B83" xlink:to="loc_us-gaap_RangeMember_244EFDB93903C4E4C4B4C72A77C78170" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_9FDD5C36F25A47E71C15C72A77C7FE3A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_244EFDB93903C4E4C4B4C72A77C78170" xlink:to="loc_us-gaap_MinimumMember_9FDD5C36F25A47E71C15C72A77C7FE3A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_8029AB2315FE421E881CC72A77C7C2D9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_244EFDB93903C4E4C4B4C72A77C78170" xlink:to="loc_us-gaap_MaximumMember_8029AB2315FE421E881CC72A77C7C2D9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_EBAA8CB70BD786003CD7C72A77C758BC" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_18969C7FAA00B81F4AFDC72A77C7281C" xlink:to="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_EBAA8CB70BD786003CD7C72A77C758BC" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_RevenueRecognitionPeriod" xlink:label="loc_ftnt_RevenueRecognitionPeriod_7B28DF163371D44AA6E7C72A77C759E5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_EBAA8CB70BD786003CD7C72A77C758BC" xlink:to="loc_ftnt_RevenueRecognitionPeriod_7B28DF163371D44AA6E7C72A77C759E5" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_73D43CE459D3C0193E02BBCCC2EA363E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock_8441BF6A0F5A71210C4ABBCCC2EADC31" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_73D43CE459D3C0193E02BBCCC2EA363E" xlink:to="loc_us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock_8441BF6A0F5A71210C4ABBCCC2EADC31" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfNotionalAmountsOfOutstandingDerivativePositionsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfNotionalAmountsOfOutstandingDerivativePositionsTableTextBlock_88DB2A677B83085FF443BBCCC2EAE300" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_73D43CE459D3C0193E02BBCCC2EA363E" xlink:to="loc_us-gaap_ScheduleOfNotionalAmountsOfOutstandingDerivativePositionsTableTextBlock_88DB2A677B83085FF443BBCCC2EAE300" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.fortinet.com/role/SummaryOfSignificantAccountingPoliciesWarrantiesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_CAFE3EB7A8CBC0FFB084BBD0EC52DA8E" xlink:type="locator" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_ScheduleOfWarrantiesTable" xlink:label="loc_ftnt_ScheduleOfWarrantiesTable_694578EB5193E6C580ACBBD0EC5229C9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_CAFE3EB7A8CBC0FFB084BBD0EC52DA8E" xlink:to="loc_ftnt_ScheduleOfWarrantiesTable_694578EB5193E6C580ACBBD0EC5229C9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_1D0EF362974A7B8DB879BBD0EC5353C0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_ScheduleOfWarrantiesTable_694578EB5193E6C580ACBBD0EC5229C9" xlink:to="loc_us-gaap_ProductOrServiceAxis_1D0EF362974A7B8DB879BBD0EC5353C0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_60A0513AB61D7A19FFC9BBD0EC531FFF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductOrServiceAxis_1D0EF362974A7B8DB879BBD0EC5353C0" xlink:to="loc_us-gaap_ProductsAndServicesDomain_60A0513AB61D7A19FFC9BBD0EC531FFF" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_HardwareProductWarrantyMember" xlink:label="loc_ftnt_HardwareProductWarrantyMember_7BCE99423127DD9BA7F3BBD0EC53598D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_60A0513AB61D7A19FFC9BBD0EC531FFF" xlink:to="loc_ftnt_HardwareProductWarrantyMember_7BCE99423127DD9BA7F3BBD0EC53598D" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_SoftwareProductWarrantyMember" xlink:label="loc_ftnt_SoftwareProductWarrantyMember_C557E51E1BDE6A7E79D1BBD0EC53B0CF" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_60A0513AB61D7A19FFC9BBD0EC531FFF" xlink:to="loc_ftnt_SoftwareProductWarrantyMember_C557E51E1BDE6A7E79D1BBD0EC53B0CF" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_WarrantiesLineItems" xlink:label="loc_ftnt_WarrantiesLineItems_53C97A329C2508B26CA2BBD0EC53C531" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_ScheduleOfWarrantiesTable_694578EB5193E6C580ACBBD0EC5229C9" xlink:to="loc_ftnt_WarrantiesLineItems_53C97A329C2508B26CA2BBD0EC53C531" xlink:type="arc" />
    <loc xlink:href="ftnt-20141231.xsd#ftnt_WarrantyLength" xlink:label="loc_ftnt_WarrantyLength_99FB59B4C5E210ADC6A7BBD0EC53F32A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_WarrantiesLineItems_53C97A329C2508B26CA2BBD0EC53C531" xlink:to="loc_ftnt_WarrantyLength_99FB59B4C5E210ADC6A7BBD0EC53F32A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MovementInStandardProductWarrantyAccrualRollForward" xlink:label="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_9DFAE9D5B2AB85030EF1BBD0EC536BD2" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ftnt_WarrantiesLineItems_53C97A329C2508B26CA2BBD0EC53C531" xlink:to="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_9DFAE9D5B2AB85030EF1BBD0EC536BD2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StandardProductWarrantyAccrual" xlink:label="loc_us-gaap_StandardProductWarrantyAccrual_255DC7BECD18A848C45CBBD0EC5326A5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_9DFAE9D5B2AB85030EF1BBD0EC536BD2" xlink:to="loc_us-gaap_StandardProductWarrantyAccrual_255DC7BECD18A848C45CBBD0EC5326A5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StandardProductWarrantyAccrualPayments" xlink:label="loc_us-gaap_StandardProductWarrantyAccrualPayments_FB64F511C1CB60BD35F6BBD0EC537762" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_9DFAE9D5B2AB85030EF1BBD0EC536BD2" xlink:to="loc_us-gaap_StandardProductWarrantyAccrualPayments_FB64F511C1CB60BD35F6BBD0EC537762" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StandardProductWarrantyAccrualWarrantiesIssued" xlink:label="loc_us-gaap_StandardProductWarrantyAccrualWarrantiesIssued_B67A610A87C44CCEE5A9BBD0EC5346B7" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_9DFAE9D5B2AB85030EF1BBD0EC536BD2" xlink:to="loc_us-gaap_StandardProductWarrantyAccrualWarrantiesIssued_B67A610A87C44CCEE5A9BBD0EC5346B7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease" xlink:label="loc_us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease_331D5F2D3F632581A1DDBBD0EC53171C" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_9DFAE9D5B2AB85030EF1BBD0EC536BD2" xlink:to="loc_us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease_331D5F2D3F632581A1DDBBD0EC53171C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StandardProductWarrantyAccrual" xlink:label="loc_us-gaap_StandardProductWarrantyAccrual_0C9D1BC4C161A3BAC702BBD0EC538023" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_9DFAE9D5B2AB85030EF1BBD0EC536BD2" xlink:to="loc_us-gaap_StandardProductWarrantyAccrual_0C9D1BC4C161A3BAC702BBD0EC538023" xlink:type="arc" />
  </presentationLink>
</linkbase>
