2006-2007第一学期计算机网络试卷1A

试卷编号：1-A第1页共11页天津理工大学考试试卷2006～2007学年度第1学期《计算机网络技术》期末考试试卷课程代码：0600100试卷编号：1-A命题日期：2006年12月10日答题时限：120分钟考试形式：闭卷笔试得分统计表：大题号总分一二三四五PARTⅠ:Choice(1pointperquestion–total:20points)Instructions:Selectoneofthelettersbesidethechoicethatisthebestanswerforeachquestion.得分Q1234567891011121314151617181920A1.Endsystemareconnectedtogetherby____.A.communicationlinksB.applicationlayerC.transportlayerD.thenetworklayer2.Whichapplication’sNOTusingTCP?A.SMTPB.HTTPC.DNSD.Allofthem3.Inthepollingprotocols,themasternodepollseachofthenodesina/an____fashion.A.randomB.appointedC.round-robinD.uncirculated试卷编号：1-A第2页共11页4.TheDNSprotocolrunsover____andusesport____.A.UDP36B.TCP36C.UDP53D.TCP535.TCPprovidesa____servicetoitsapplicationstoeliminatethepossibilityofthesenderover-flowingthereceiver’sbuffer.A.flow-controlB.congestioncontrolC.reliabilitycontrolD.dataconnection6.Wecanclassifyjustaboutanymultipleaccessprotocolasbelongingtooneofthreecategories:channelpartitioningprotocols,randomaccessprotocols,and____.A.addressresolutionprotocolsB.DynamichostconfigurationprotocolsC.link-controlprotocolsD.taking-turnsprotocols7.Thejobofdeliveringthedataintransport-layersegmenttothecorrectsocketiscalled____.A.multiplexingB.demultiplexingC.congestioncontrolD.data-transport8.Themaximumtransferunit(MTU)inEthernetframestructureis____byte.A.1000B.1500C.800D.20009.ThesocketofUDPisidentifiedby_____and_______.A.sourceIPaddressandsourceportnumberB.destinationIPaddressanddestinationportnumber.C.sourceIPaddressanddestinationportnumber.D.destinationIPaddressandsourceIPaddress.10.Whichisnotplugandplayinthefollowingfouritems?A.DHCPB.HubsC.RoutersD.Switches11．Whichofroutersisnotdefaultrouters?A.first-hoprouterB.sourcerouterC.destinationrouterD.second-hoprouter12．Whichofcharactersisnotdistance-vectoralgorithm’scharacters？A.iterativeB.globalC.asynchronous试卷编号：1-A第3页共11页D.distributed13.ICMPis_____.A.theprotocolofApplicationlayerB.theprotocolofnetworklayerC.theprotocoloftransportlayerD.notapartofTCP/IPprotocols14.Asgeneral,wehasfollowingchannelpartitioningprotocolsexcept____.A.TDMB.CSMAC.FDMD.CDMA15.____ismostusedforerrorreporting.A.UDPB.SMTPC.FTPD.ICMP16.TheheaderofIPV6is____byte.A.20B.40C.60D.8017.Inthenetworklayertheseservicearehost-to-hostserviceprovidedby____.A.thetransportlayertothenetworklayerB.thenetworklayertothetransportlayerC.thenetworklayertothenetworklayerD.thetransportlayertothetransportlayer18.Ifthereisnotenoughmemorytobufferanincomingpacket,apolicythatdropthearrivingpacketcalled____.)A.drop-tailB.packetlossC.protocolD.encapsulation19.Ineithercase,a____receivesroutingprotocolmessages,whichareusedtoconfigureitsforwardingtable.A.serverB.hostC.routerD.Modem20.WhichofthefollowingfunctionsdoesnotbelongtoPPP___.A.framingB.link-controlprotocolsC.network-controlprotocolsD.errorcorrection试卷编号：1-A第4页共11页PARTⅡ:True/False(1pointsperquestion–total:20points)Instructions:Markthesymbol“√”(forTrue)ifthestatementiscorrect,orthesymbol“X”(forFalse)ifthestatementisincorrect.得分Q1234567891011121314151617181920A1.TheDNSservercanupdatetherecords.2.TheTCPconnectionisadirectvirtualpipebetweentheclient’ssocketandtheserver’sconnectionsocket.3.SMTPprotocolconnectthesender’smailserverandreceiver’smailserver4.Whereasatransport-layerprotocolprovideslogicalcommunicationbetweenprocessesrunningondifferenthosts,anetwork-layerprotocolprovideslogicalcommunicationbetweenhosts.5.UDPandTCPalsoprovideintegritycheckingbyincludingright-detectionfieldsintheirheaders.6.IftheapplicationdeveloperchoosesUDPinsteadofTCP,thentheapplicationisnotdirectlytalkingwithIP.7.Whenwedevelopanewapplication,wemustassigntheapplicationaportnumber.8.Real-tineapplications,likeInternetphoneandvideoconferencing,reactverypoorlytoTCP’scongestioncontrol.9.ThesenderknowsthatareceivedACKorNAKpacketwasgeneratedinresponsetoitsmostrecentlytransmitteddatapacket.10.Tosimplifyterminology,wheninanInternetcontext,werefertothe4-PDUasaunit.11.DValgorithmisessentiallytheonlyroutingalgorithmusedinpracticetodayintheInternet。12.Everyrouterhasmanyforwardingtables.13.Ineithercase,aserverreceivesroutingprotocolmessages,whichareusedtoconfigureitsforwardingtable.14.AmongtheASs,theyrunthesameinter_ASroutingprotocol.试卷编号：1-A第5页共11页15.Routingprotocols’jobistodeterminethepathtakebyadatagrambetweensourceanddestination.16.OSPFwasoneoftheearliestintra_ASInternetroutingprotocols.17.TheIPV6datagramsaremoresimpler,morestreamlined.18.Forwardingtablesindatagramnetworkscanbemodifiedatanytime.19.InaVCnetwork,thenetwork’sroutersmustmaintainconnectionstateinformationfortheongoingconnections.20.Theroutersofdatagramnetworksuseforwardingtable,theroutersofvirtual-circuitnetworksdon’tuseforwardingtable.PARTⅢ:Fillinthefollowingblankwithaorsomeappropriateword/words.(1pointsperblank–total:20points)得分1.Inthe“10BaseT”,Tstandsfor().2.()and()aretwoofthemostimportantprotocolsintheinternet.3.Inaclient-serverarchitecture,thereisanalways-onhost,calledthe(),whichservicesrequestsfrommanyotherhosts,called().4.ThebroadcastdestinationIPaddressis().5.Twoofthemoreimportant()protocolsarep