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1、14051082_06F9_c3?1999,CiscoSystems,Inc.1ExtranetArchitectureSession140514051082_06F9_c3?1999,CiscoSystems,Inc.2Copyright?1998,CiscoSystems,Inc.Allrightsreserved.PrintedinUSA.1082_06F9_c3.scr1Agenda?WhatIsanExtranet??WhyUseanExtranet??TypesofExtranets?CaseStud
2、y?Conclusions14051082_06F9_c3?1999,CiscoSystems,Inc.3WhatIsanExtranet?Bilateral?Asemi-publicintranet?Asemi-privateInternetOverlayInternet?AprivatenetworkthatconnectsindependentpeerorganizationsShared14051082_06F9_c3?1999,CiscoSystems,Inc.4Copyright?1998,Cisco
3、Systems,Inc.Allrightsreserved.PrintedinUSA.1082_06F9_c3.scr2WhyUseanExtranet??Businessmodel(policy)Policy?ControlSecurityQualityofService?Costs$$$14051082_06F9_c3?1999,CiscoSystems,Inc.5WhoConnectstoExtranets??Suppliers?Partners?Customers?Co-petitors14051082_
4、06F9_c3?1999,CiscoSystems,Inc.6Copyright?1998,CiscoSystems,Inc.Allrightsreserved.PrintedinUSA.1082_06F9_c3.scr3TypesofExtranets?Bilateral?OverlayInternet?Shared14051082_06F9_c3?1999,CiscoSystems,Inc.7Bilateral14051082_06F9_c3?1999,CiscoSystems,Inc.8Copyright?
5、1998,CiscoSystems,Inc.Allrightsreserved.PrintedinUSA.1082_06F9_c3.scr4Extranet—Bilateral?Privatecircuitstosuppliers,partners,andcustomers?Example:Cisco14051082_06F9_c3?1999,CiscoSystems,Inc.9Extranets—CiscoSystemsPartners/Extranet(1999)14051082_06F9_c3?1999,C
6、iscoSystems,Inc.10Copyright?1998,CiscoSystems,Inc.Allrightsreserved.PrintedinUSA.1082_06F9_c3.scr5Extranet—BilateralDMZFirewallInternetCorporateIntranetFirewallDMZPartner#1Partner#214051082_06F9_c3?1999,CiscoSystems,Inc.11Bilateral—PhysicalConnectionPartner#1
7、CorporateIntranet?SinglelinetoapartnerLeasedlineOthertransportservice?UsuallynotthroughtheInternet14051082_06F9_c3?1999,CiscoSystems,Inc.12Copyright?1998,CiscoSystems,Inc.Allrightsreserved.PrintedinUSA.1082_06F9_c3.scr6Bilateral—Addressing?RegisteredIPaddress
8、espreferableAddressauthorityassignedGloballyunique?Privateaddresses—RFC1918RequirescoordinationMustbelocallyunique14051082_06F9_c3?1999,CiscoSystems,Inc.13PrivateAddressing(1)10.0.0.0131.
