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1、Computer NetworksTopicandScopeComputernetworksandinternets:anoverviewofconcepts,terminology,andtechnologiesthatformthebasisfordigitalcommunicationinprivatecorporatenetworksandtheglobalInternet.YouWillLearnIntroductionFundamentalconceptsBasicdefinitions
2、CommunicationbasicsMediaandsignalsAsynchronousandsynchronouscommunicationRelationshipsamongbandwidth,throughput,andnoiseFrequency-divisionandtime-divisionmultiplexingYouWillLearn(continued)NetworkingandnetworktechnologiesPacketswitchingFraming,parityand
3、errordetectionLocalandwideareatechnologiesNetworkaddressingConnectionandextension(repeaters,bridges,hubs,switches)Topologiesandwiring(star,ring,bus)Next-hopforwardingShortestpathcomputationMeasuresofdelayandthroughputProtocollayersYouWillLearn(continued
4、)InternetsandInternetworkingMotivationandconceptInternetProtocol(IP)datagramformatandaddressingInternetroutersandroutingAddressbinding(ARP)Internetcontrolmessages(ICMP)UserDatagramProtocol(UDP)TransmissionControlProtocol(TCP)Protocolportsanddemultiplexi
5、ngYouWillLearn(continued)NetworkapplicationsClient-serverparadigm(范例)Domainnamesystem(DNS)Filetransfer(FTP)Remotelogin(TELNET)Emailtransfer(SMTP)WebtechnologiesandprotocolsHTTP,CGI,JavaPuttingallpiecestogetherScheduleofTopicsIntroduction(1weeks)Datatran
6、smission:Signals,media,bandwidth,throughput,andmultiplexing(1.5weeks)Packettransmission:concepts,technologies(5weeks)Internetworkingfundamentals(3weeks)Networkingapplications(1.5weeks)Chapter1-3IntroductionWhatisaComputerNetwork?Acollectionofcomputers(P
7、Cs,workstations)andotherdevices(e.g.printers,creditcardreaders)areallinterconnectedComponents:Hosts(computers)Links(coaxialcable,twistedpair,opticalfiber,radio,satellite)Switches/routers(intermediatesystems)Goal:provideubiquitous(普遍的)accesstoresources(e
8、.g.,databaseservers,Web),allowremoteuserstocommunicate(e.g.,email)UserrunsapplicationsWhatisaComputerNetwork?MajorNetworkCategoriesTheglobalInternetInternalcorporatenetworksTheworldwidetelephonesystemWhatisaComputerNetwork?Teleco
