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1浙江大学2004–2005学年夏季学期《网络系统设计与工程》课程期末考试试卷开课学院：计算机学院，考试形式：闭，允许带___________入场考试时间：_2005_年_7月_9_日,所需时间：120分钟考生姓名：_____学号：专业：________题序一二三四五六七八总分得分评卷人注意事项：1.请把答案写在答题纸对应的题号内；2.有关IP地址表达方式，如果没有特别的掩码标明，则均按标准地址分类表示。一、Pleaseselectthebestchoiceforfollowingquestion(60points)1.WhichofthefollowingwouldbeusedtoconnectaroutertoanEthernetswitch?A.straight-throughRJ45cableB.cross-overRJ45cableC.RS232cableD.aV.35cable2.HowdoyouconnecttoarouterusingHyperTerminal?A.ConnecttheEthernetportofyourhosttotheEthernetinterfaceoftherouterusingarolledcable.B.ConnecttheCOMportofyourhosttotheEthernetportofyourrouterusingastraight-throughcable.C.ConnecttheCOMportofyourhosttotheconsoleportoftherouterusingacrossovercable.D.ConnecttheCOMportofyourhosttotheconsoleportoftherouterusingarolledcable.3.WhichoffollowingcommandisusedtoprintroutingtableofaQuidwayrouter?A.displayiprouteB.displayippathC.showiprouteD.displaycurrent-config4.Whichlayer-2deviceenableshigh-speeddataexchange?A.RepeaterB.HubC.SwitchD.Router5.Whichofthefollowingisacorrectpingtoahost?A.Routerping172.16.0.02B.Router#ping172.16.25.255C.Routerping172.16.10.2D.Router#ping172.16.2.2566.Howmanysubnetsandhostscanyougetfromthenetwork192.168.254.0/26?A.4networkswith64hostsB.2networkswith62hostsC.254networkswith254hostsD.1networkwith254hostsAnswerB.Ibetyoustruggledwiththisone,althoughitisn’tdifficult.Buttheanswerswillmakeyouthink.First,the254-hostanswersarenotevenclose,soyouhavea50/50chancebetweenthefour-networkandtwo-networkoptions.ThepartyouprobablythoughtaboutthemostiswhetherCiscoisusingsubnet-zero.Thiswouldprovidefournetworksinsteadoftwo.Makessense.However,Ciscodoesnotconsidersubnet-zerovalidonanyoftheirexams.Inaddition,youcannotget64hostswiththismask,only62hostspersubnet,regardlessofwhetheryouareusingsubnet-zeroornot,whichmakesthefournetworkanswerscompletelywrong.7.IfacompanygetsaclassBIPaddressesandplanstoassignto12departmentsequably,themostefficientsubnetmaskis？A．255.255.128.0B．255.255.192.0C．255.255.240.0D．255.255.252.08.Whichisthemostefficientsubnetmasktouseonpoint-to-pointlinks?A.255.255.255.0B.255.255.255.224C.255.255.255.252D.255.255.255.2489.YouarethenetworkadministratorforRouterSim.com,andausercannotreachthecorporateserverfromtheirremoteoffice.TheIPaddressofthehostis192.168.254.10/24,thedefaultgatewayofthehostis192.168.254.1,andtheserveris192.168.10.10/24.YouhavetheusertypethefollowingfromaDOSprompt:ping192.168.254.1;thisisunsuccessful.Youthenhavetheusertype:ping127.0.0.1;thisisalsounsuccessful.Whatcouldtheproblembe?A.Therouterisdown.B.Theserverisdown.C.TCP/IPisnotinitializedonthehost.D.TheEthernetcableisunpluggedfromthehost.AnswerC.127.0.0.1iscalledtheloopbackaddressandisusedfordiagnosticsonahost.Ifyoucannotpingthisaddress,thenyouhaveaproblemwiththeIPstackonthehost.10.WhichofthefollowingpromptsindicatesthatyouareinprivilegedEXECmode?A.B.(config)#C.#3D.!11.Ifyoutypeacommandandreceivetheerror“%incompletecommand”fromaswitchCLI,whatwouldyoudotogethelp?A.TypehistorytoreviewtheerrorB.Re-enterthecommandfollowedbyaquestionmarktoviewthekeywordsC.TypehelpD.Enteraquestionmarktoseealltheconsolecommands12.WhichoffollowingcommandisusedtoprintroutingtableofaQuidwayrouter?A．displayiprouteB．displayippathC．showiprouteD．displaycurrent-config13.WhatkeystrokewillterminatesetupmodeinCiscoIOS?A.Ctrl+ZB.Ctrl+^C.Ctrl+CD.Ctrl+Shift+^14.Whichofthefollowingcommandswilldisplayabackupconfiguration?A.shrunning-configB.showstartup-configC.showversionD.showbackup-config15.WhichofthefollowingcommandswillconfigureallthedefaultVTYportsonarouter?A.Router#linevty04B.Router(config)#linevty04C.Router(config-if)#linevty04D.Router(config)#linevtyall16.Whichofthefollowingcommandssetsthesecretpasswordto“Cisco”?A.enablesecretpasswordCiscoB.enablesecretciscoC.enablesecretCiscoD.enablepasswordCisco17.Whichofthefollowingcommandswillreloadtherouter?A.RouterreloadB.Router#resetC.Router#reloadD.Router(config)#reload18.Whatcommandwilldisplayallthevalidcommandsatthegivenmode?A.helpB.helpallC.?D.list19.Whatistheproblemwithaninterfaceifyoutypeshowinterfaceserial0andreceivethefollowingmessage?“Serial0isadministrativelydown,lineprotocolisdown”A.Thekeepalivesaredifferenttimes.B.Theadministratorhastheinterfaceshutdown.4C.Theadministratorispingingfromtheinterface.D.Nocableisattached.20.WhatlayeroftheOSImodelwouldyouassumetheproblemisinifyoutypeshowinterfaceserial1andreceivethefollowingmessage?“Serial1isadown,lineprotocolisdown”A.PhysicallayerB.DataLinklayerC.NetworklayerD.None;itisarouterproblem.21.IfyoudeletethecontentsofNVRAMandreboottherouter,whatmodewillyoubein?A.PrivilegedmodeB.GlobalmodeC.SetupmodeD.NVRAMloadedmode22.WhichofthefollowingisnotstoredinRAM?A.PacketbuffersB.Startup-configD.ARPcacheE.Routingtable23.Ifyouwanttodisplayallthecommandsinthehistorybuffer,whichcommandwillyouuse?A.Ctrl+Shift+6thenXB.Ctrl+ZC.showhistoryD.showhistorybuffer24.WhichofthefollowingcommandsassignstheIPprocessingonarouterinterface?A.enableipB.networkip_addressC.ipaddressip_addressnetmaskD.reloadandrestart25.Whichcommandwillprovideyouwithinformatio