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、英译汉（10分）1.TCP(TransmissionControlProtocol)传输控制协议2.IP(InternetProtocol)互联网协议3.RFC(Requestsforcomments)请求评议4.SMTP(SimpleMailTransferProtocol)简单邮件传输协议5.Congestion-control拥塞控制6.Flowcontrol流控制7.UDP(UserDatagramProtocol)用户数据报协议8.FTP(FileTransferProtocol)文件传输协议9.HTTP(Hyper-TextTransferProtocol)超文本传输协议10.TDM时分复用11.FDM频分复用12.ISP(InternetServiceProvider)互联网服务提供商13.DSL(DigitalSubscriberLine)数字用户线路14.DNS(DomainNameSystem)域名系统15.ARQ(AutomaticRepeatRequest)自动重发请求16.ICMP(InternetControlMessageProtocol)网间控制报文协议17.AS(AutonomousSystems)自制系统18.RIP(RoutingInformationProtocol)\路由信息协议19.OSPF(OpenShortestPathFirst)开放最短路径优先20.BGP(BorderGatewayProtocol)边界网关协议21.HFC光纤同轴电缆混合网22.CRC(CyclicRedundancyCheck)循环冗余检验23.CSMA/CD带冲突检测的载波侦听多路存取24.ARP地址解析协议25.RARP反向地址解析协议26.DHCP动态主机配置协议27.RTT循环时间28.IETF(P5)互联网工程任务组29.URL(P88)统一资源定位30.API应用程序编程接口31.MIME多用途互联网邮件扩展32.MTU(P328)最大传输单元二、单项选择题（每小题l分，共30分）1.DSLdividesthecommunicationlinkbetweenthehomeandtheISPintothreenonoverlappingfrequencybands,aupstreamchannelisin_A_________.A)50kHzto1MHzbandB)1MHzto2MHzbandC)4kHzto50kHzbandD)0to4kHzband2.Asadatapacketmovesfromtheuppertothelowerlayers,headersareA.A)Added;B)subtracted;C)rearranged;D)modified3.Whatisthemainfunctionofthenetworklayer?DA)node-to-nodedelivery;B)process-to-processmessagedeliveryC)synchronization;D)updatingandmaintenanceofroutingtables4.Whichofthefollowingisthedefaultmaskfortheaddress168.0.46.201?BA)255.0.0.0;B)255.255.0.0;C)255.255.255.0;D)255.255.255.2555.Arouterreadstheaddressonapackettodeterminethenexthop.AA)IP;B)MAC;C)source;D)ARP6.Whichdevicecan’tisolatesthedepartmentalcollisiondomains.AA)Hub;B)switch;C)router;D)AandB7.Inputportofarouterdon’tperform____D____functions.A)thephysicallayerfunctionsB)thedatalinklayerfunctionsC)lookupandforwardingfunctionD)networkmanagement8.HTTPhasamechanismthatallowsacachetoverifythatitsobjectsareuptodate.ThemechanismisDA)persistentconnectionsB)cookiesC)WebCachingD)conditionalGET9.Aprotocollayercanbeimplementedin___D_____.A)softwareB)hardwareC)acombinationofthesoftwareandhardwareD)Alloftheabove10.Aprotocolhasthreeimportantfactors,theyare_A______.A)syntax,semantics,orderB)syntax,semantics,layerC)syntax,semantics,packetD)syntax,layer,packet11.Therearetwobroadclassesofpacket-switchednetworks:datagramnetworksandvirtual-circuitnetworks.Thevirtual-circuitnetworksforwardpacketsintheirswitchesuse___D___.A)MACaddressesB)IPaddressesC)e-mailaddressesD)virtual-circuitnumbers12.TCPservicemodeldoesn’tprovide___D_______service.A)reliabletransportserviceB)flowcontrolserviceC)congestion-controlserviceD)guaranteeaminimumtransmissionrateservice.13.Usuallyelasticapplicationsdon’tinclude____B______.A)ElectronicmailB)InternettelephonyC)filetransferD)Webtransfer14.AuserwhousesauseragentonhislocalPCreceiveshismailsitedinamailserverbyusing_B___protocol.A)SMTPB)POP3C)SNMPD)FTP15.Consideringsliding-windowprotocol,ifthesizeofthetransmittedwindowisNandthesizeofthereceivingwindowis1,theprotocolisBA)stop-and-waitprotocolB)Go-Back-NprotocolC)selectiveRepeatprotocolD)alternating-bitprotocol16.whichIPaddressiseffective___B______.A)202,131,45,61B)126.0.0.1C)192.268.0.2D)290.25.135.1217.ifIPaddressis202.130.191.33,subnetmaskis255.255.255.0,thensubnetprefixis__D_____A)202.130.0.0B)202.0.0.0C)202.130.191.33D)202.130.191.018.ThecommandPingsimplementedwith__B______messagesA)DNSB)ICMPC)IGMPD)RIP19.Whichlayer-functionismostlyimplementedinanadapter?__A________A)physicallayerandlinklayerB)networklayerandtransportlayerC)physicallayerandnetworklayerD)transportlayerandapplicationlayer20.IfauserbringshiscomputerfromChengdutoPeking,andaccessesInternetagain.Now,__B_____ofhiscomputerneedstobechanged.A)MACaddressB)IPaddressC)e-mailaddressD)useraddress1..tracerouteisimplementedwith__B____messages.A)DNSB)ICMPC)ARPD)RIP2.ArouterreadstheAaddressonapackettodeterminethenexthop.A.IP;B.MAC;C.source;D.ARP3.Therearetwobroadclassesofpacket-switchednetworks:datagramnetworksandvirtual-circuitnetworks.Thevirtual-circuitnetworksforwardpacketsintheirswitchesuse___D___.A)MACaddressesB)IPaddressesC)e-mailaddressesD)virtual-circuitnumbers4.Aboutsubnet,whichunderlyingdescriptionisn’tright______A)deviceinterfaceswithsamesubnetpartofIPaddressB)can’tphysicallyreacheachotherwithoutinterveningarouter.C)allofthedevicesonagivensubnethavingthesamesubnetaddress.D)Aportionofaninterface’sIPaddressmustbedeterminedbythesubnettowhichitisconnected.5.ifIPaddressis102.100.100.32,subnetmaskis255.255.240.0,thensubnetprefixis___A___A)102.100.96.0B)102.100.0.0C)102.100.48.0D)102.100.112.06Ifauserbringshiscomputerfromchengdutobeijing,andaccessesInternetagain.Now,___B__ofhiscomputerneedstobechanged.A)MACaddressB)IPaddressC)e-mailaddressD)useraddress7.Inputportofarouterdon’tperform____D___functions.A)thephysicallayerfunctionsB)thedatalinklayerfunctionsC)lookupandforwardingfunctionD)networkmanagement8.switchingfabricisattheheartofarouter,switchingcanbeaccomplishedinanumberofways,donitinclude_D_A)SwitchingviamemoryB)SwitchingviacrossbarC)SwitchingviaabusD)Switchingviabuffer9.ifahostwantstoemitadatagra