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1、AboutThisManualDocumentObjectivesThispublicationprovidesinternetworkingdesignandimplementationcasestudiesandexamples,withtheintenttohelpyouidentifyandimplementpracticalinternetworkingstrategiesthatarebothflexibleandscalable.Thispublicationwasdevelopedtoassistprofes
2、sionalspreparingforCiscoCertifiedInternetworkExpert(CCIE)candidacy,thoughitisavaluableresourceforallinternetworkingprofessionals.ItisdesignedforuseinconjunctionwithotherCiscomanualsorasastandalonereference.YoumayfindithelpfultorefertotheCiscoCCIEFundamentals:Network
3、Design,whichprovidesdetaileddescriptionsoftheinternetworkingstrategiesandtechnologiesusedinthispublication.AudienceThispublicationisintendedtosupportthenetworkadministratorwhodesignsandimplementsrouter-orswitched-basedinternetworks,anddescribespracticalexamplesofh
4、owtoapplyCiscofeaturestomeetinternetworkingneeds.ReadersshouldknowhowtoconfigureaCiscorouterandshouldbefamiliarwiththeprotocolsandmediathattheirroutershavebeenconfiguredtosupport.Readerswillbetterunderstandthematerialinthispublicationiftheyarefamiliarwithnetworkingt
5、erminology.TheCiscoInternetworkingTermsandAcronymspublicationisausefulreferenceforthosewithminimalknowledgeofnetworkingterms.DocumentOrganizationThismanualcontainstwelvechapters,whicharedescribedbelow:Chapter1“RIPandOSPFRedistribution,”whichaddressestheissueofinte
6、gratingRoutingInformationProtocol(RIP)networkswithOpenShortestPathFirst(OSPF)networksChapter2,“Dial-on-DemandRouting,”whichaddressesthedial-on-demandrouting(DDR)featurethatallowsyoutouseexistingtelephonelinestoformawide-areanetwork(WAN).Chapter3,“IncreasingSecurit
7、yonIPNetworks,”whichaddressesthebroadtopicofnetworksecurity.Chapter4,“IntegratingEnhancedIGRPintoExistingNetworks,”whichaddressestheEnhancedInteriorGatewayRoutingProtocol(IGRP).Chapter5,“ReducingSAPTrafficinNovellIPXNetworks,”whichaddresseshowtodealwiththenuancesof
8、NovelIPXnetworks.Chapter6,“UDPBroadcastFlooding,”whichaddressesheinterworkingsofbroadcastdatapackets.AboutThisManualxiDocumentConventionsChapter7,“STUNf