2023-2024第二学期计算机网络试卷1A.docx

天津理工高校考试试卷20232023学年度第2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：2023年5月20日答题时限：120分钟考试形式：闭卷笔试PARTI:SingleChoice(1pointperquestion-total:20points)IiIStnIetiOns:SeIeCtoneofthelettersbesidethechoicethatisthebestanswerforeachquestion.得分Q1234567891011121314151617181920A1. WhichofthefollowingservicesdoestheInternetnetworklayerprovidefortheInternettransportlayer?a) In-orderdeliveryofdatasegmentsbetweenprocessesb) Besteffortdeliveryofdatasegmentsbetweencommunicatinghostsc) Multiplexinganddemultiplexingoftransportlayersegmentsd) Congestioncontrol2. ThemaintaskoftheIntemet,sDomainNameSystem(DNS)isto:a) TranslateportnumberstoIPaddressesb) SpecifythestandardsforInternetdomainnamesc) Provideanauthorityforregisteringdomainnamesd) TranslatemnemonicnamestoIPaddresses3. RDT3.0,sreceiverFSMissameto:a)RDTLOb)RDT2.1c)RDT2.2d)RDT2.04. TheTransmissionControlProtocol(TCP)provideswhichofthefollowingservices?a) End-to-endstationaddressingb) Applicationmultiplexingc) Internetworkroutingd) Mediumaccesscontrol(MAC)5. Whenadestinationhosttransportlayerreceivesdatafromthenetworklayer,itunambiguouslyidentifiestheappropriateprocesstopassthedatatobyusingatripletconsistingof:a) Sourceport#,destinationIPaddress,andsourceIPaddressb) Destinationport#,sourceport#,processID#a)Destinationport#,sourceport#,destinationIPaddressc) Destinationport#,sourceport#,sourceIPaddress6. Giventhattherequestedinformationisnotavailableatanyintermediatedatabases,anon-iteratedDNSqueryfromarequestinghostwouldfollowthepath:a) Rootnameserver,localnameserver,authoritativenameserverb) Authoritativenameserver,rootnameserver,hostnameserverc) 1.ocalnameserver,rootnameserver,localnameserver,authoritativenameserverd) 1.ocalnameserver,rootnameserver,authoritativenameserver7. Fromthelistbelow,selecttheitemsfoundintheTCPsegmentstructurethatarenotfoundintheUDPsegmentstructure:a) ApplicationGeneratedDatab) DestinationPort#c) SourcePort#a)Sequence#8. Selectthefouressentialsteps,brieflydescribed,forterminatingaTCPconnectionbetweenaclientandaserver,assumingthattheinitiatinghostistheclient:(1) ClientsendsTCPsegmentwithACKOandfinalsequencenumber(2) ClientsendsTCPsegmentwithFIN=1andgoesintoFIN_WAITstate(3) ServersendsTCPsegmenttoACKtheclient,sFINrequestandentersCLOSEWAITstate(4) ServersendsTCPsegmentwithFIN=O(5) ServersendsTCPsegmentwithFIN=I(6) ClientsendsTCPsegmentwithtoACKserver'sFINandenterssecondFINWAITstate(7) ClientsendsTCPsegmentwithFIN=Oa)2,3,5,6b)5,1,2,3c)1,3,5,7d)2,3,4,69. TheRIProutingprotocolisbasedonanalgorithmthatis:a) Basedoninformationreceivedonlyfromlink“neighbors”b) Alinkstatealgorithmc) AnOSPFalgorithmd) Acentralizedroutingalgorithm10. Whencompensatingforlinkcostchangesinthedistancevectoralgorithm,itcangenerallybesaidthat:a) Increasedcostsarepropagatedquickly,i.e.,ubadnewsntravelsfastb) Decreasedcostsarepropagatedrapidly,i.e.,4tgoodnews,*travelsfastc) Decreasedcostsdonotconverged) Noneoftheabovea) TwoimportantreasonsthattheInternetisorganizedasahierarchyofnetworksforthepurposesofroutingare:b) 1.eastcostandmaximumfreecircuitavailabilityc) Scaleandadministrativeautonomyd) Messagecomplexityandspeedofconvergencee) 1.inkcostchangesandlinkfailure11. Withanexteriorroutingprotocol,whichofthefollowingissuesgenerallydominatestheroutingdecisions?a) GeographicaldistancebetweenAS,sb) Policyc) NumberofAS,straversedd) CurrentcongestionlevelsintheAS,s12. ThehostcomponentofaCIDRaddressoftheformcancontainaddressesfor:a) 2(32-22)hosts(minusttspeciaF,hosts)b) 512hosts(minususpecia,hosts)c) dtimes22hostsd) 10hosts(minus4specia,hosts)13. AsanIPdatagramtravelsfromitssourcetoitsdestination:a) thesourceIPaddressischangedateachroutertoidentifythesendingrouterb) therouterusesthedestinationIPaddresstoconsultitsroutingtablec) therouterdoesnotusetheIPaddressesinthedatagramd) thedestinationIPaddressischangedateachroutertoreflectthenexthop14. Fromthelistbelow,choosethebitpatternwhichcouldbeavalidgeneratorvaluefortheCRCcode(R)11010:a)HlOb) OllOlOc) 100101d) 1001115. Theprimaryfunctionoftheaddressresolutionprotocol(ARP)thatresidesinInternethostsandroutersis:a) ToprovideLANrouterfunctionsb) TotranslatebetweenLANaddressesandphysicalinterfaceaddressesc) TotranslatebetweenIPaddressesandLANaddressesd) TocalculatetheshortestpathbetweentwonodesonaLAN16. Considersendinga1300byteIPv4datagramintoalinkthathasanMTUof500bytes:a) Threefragmentsarecreated.b) Fourfragmentsarecreated.c) Threefragmentsarecreatedwithoffsets0,5001000d) Thelastfragmentconsistsofexactly300bytesofdatafromtheoriginaldatagram17. SupposeoneIPv6routerwantstosendadatagramtoanotherIPv6router,butthetwoareconnectedtogetherviaaninterveningIPv4router.Ifthetworoutersusetunneling,then:a) ThesendingIPv6routercreatesanIPv4datagramandputsitinthedatafieldofanIPv6dat