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NetwareToken─RingDriver研究.docx

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NetwareToken─RingDriver研究 Introduction NetwareToken-RingdriverisasoftwareprogramthatallowscommunicationbetweenToken-RingnetworksandNetwareservers.Token-Ringnetworkswerecommonlyusedintheearlydaysofcomputernetworking,andNetwareserverswerewidelyusedforfileandprintsharing.TheNetwareToken-RingdriverenabledcomputersrunningNetwaretocommunicatewithothercomputersonaTokenRingnetworkandaccessfilesandprinterssharedbyotherservers. HistoryofTokenRing TokenRingwasanetworkingstandarddevelopedbyIBMinthe1980sasanalternativetoEthernet.ATokenRingnetworkconsistsofcomputers,printers,andotherdevicesconnectedtogetherinalogicalring.TokenRingusesatokenpassingmechanismtocontrolaccesstothenetwork.Onlythedevicewiththetokencantransmitdataonthenetwork.Whenadevicehasfinishedtransmitting,itpassesthetokentothenextdeviceinthering. TokenRingwaspopularinthe1980sandearly1990sasitofferedcertainadvantagesoverEthernet.TokenRinghadahigherdatatransferrate,waslesspronetocollisions,andhadamoredeterministicmediumaccessmethod.However,TokenRingwasmoreexpensivetoinstallandmaintain,andEtherneteventuallybecamethedominantnetworkingstandard. Netware NetwarewasdevelopedbyNovellinthe1980sasanetworkoperatingsystemforservers.Netwarewaswidelyusedinthe1990sforfileandprintsharing,email,andnetworkmanagement.Novellhadadominantmarketshareinthenetworkoperatingsystemmarketintheearly1990s. NetwareToken-RingDriver TheNetwareToken-RingdriverwasdevelopedtoallowNetwareserverstocommunicatewithcomputersonaTokenRingnetwork.ThedriverwasimplementedasaNetwareLoadableModule(NLM)thatcouldbeloadedontoaNetwareserver.ThedriverprovidedprotocolsforTokenRing,suchastheTokenRingAccessMethod(TRAM),SourceRoutingProtocol(SRP),andNetwareLinkServicesProtocol(NLSP).TheseprotocolsallowedcomputersontheTokenRingnetworktoaccessfilesandprinterssharedbytheNetwareserver. TheNetwareToken-Ringdriverwasacriticalcomponentintheearlydaysofcomputernetworkingasitalloweddifferenttypesofnetworkstointeroperate.ItenabledbusinessesthatusedNetwareserverstoconnecttotheirexistin