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1、管理信息系统10,交通管理信息系统,建设行业管理信息系统,国家科技管理信息系统,全国教师管理信息系统,管理信息系统,测绘资质管理信息系统,教师管理信息系统,华政教学管理信息系统,管理信息系统案例MANAGEMENTINFORMATIONSYSTEMS8/ERaymondMeLeod,Jr.andGeorgeSchellChapter10DataCommunicationsDE10.2CommunicationBasics目ComputercommunicationsisatUlodgEy-ApplicationlevelL途X-Communicationchannel目Protocol-Set
2、ofrulesforcommunicationsLopcANsAnIraRtAToNALEDENORMALISATN加010.2.1ProtocolsforCompulterCommunication目arlyComputerS五TelIninalS团育J蚊T目SystemNetworkArchitecture(SNAJ)一EstablishedbyIBMin1974一Proprietary目Token-Ring-HostcomputercontrolledyyProtocolsforComputerCommunicationD一XeroxworkingwithIntelandDigitalE
3、quipmentCorporationdevelopedthisprotocol一Non-proprietary-DefinedbyIEEE-Worksonasingletransmissionline-NotokenispassedE10.2.2packets目Pieceofthetotaldatatobecommunicated,combinedwiththeaddressofthedestinationcomputerforthedataandothercontrolinformation.TransmissionControlProtocolInternetProtocol(TCP/I
4、P)isoneofthemoreimportantpacketswitchingprotocols10.2.3NetwWorkAddr6SS6San一Four-partsetofnumbers一Eachfrom0to2535目JnternetServiceProviders(ISPs)一Userconnectsthroughcommoncarrier目SerialLineInternetProtocol(SLIP)andPoint-to-PointProtocol(PPP)一Protocolsforusersathome10-810.2.4ProtocolsforPublicPhoneE欣4血一一olderprotocol目JntegratedServicesDigitalNetwork(ISDNJ)一Digitale国EProtocolsforPublicPhoneSystemscontJ目FrameRelaysE东训ye目AsynchronousTransferMode(ATMD)一Smallerpacketsize一Fastertransmissionspeeds10-10
