东北大学计算机网络B卷(附答案).pdf

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1、…东北大学考试试卷（B卷）…总分一二三四五学院…2009—2010学年第一学期……课程名称：计算机网络（ComputerNetworks）○班级…┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄……()10．Withrespecttoprotocollayer,theRARPprotocolinTCP/IPcorrespondsto:Ⅰ.MultipleChoice（20points,1pointforeach）学号…Directions:Choosethecorrectanswerforeachquestion

2、andfillitintheA.physicallayerB.datalinklayerC.networklayerD.transportlayer…correspondingblank.ThereisONLYONEcorrectanswerforeach密question.()11．ThelowerlayerofRIPprotocoluses:…A.UDPB.TCPC.ARPD.IP…()1．Therearetwokindsofcoaxialcablesusuallyused.Oneisthebaseband姓名…cableandtheotheristhebroadbandcable

3、.Theimpedanceofthebroadbandcableis:()12．WhichportonseverdoestheSMTPprotocoluse?…A.50ΩB.70ΩC.75ΩD.90ΩA.20B.23C.25D.110…○()2．AccordingtotheISO/OSIreferencemodel,therouterworkson:()13．Whatisthemaskforasmallestsubnetusableinpractice?…A.DatalinklayerB.NetworklayerC.TransportlayerD.PresentationA.255.2

4、55.255.0B.255.255.255.254C.255.255.255.252D.255.255.255.255…layer…()14．WhichofthefollowingistrueoftheIPaddress198.0.0.10usingdefaultmask?…()3．WhichdeviceextendstheLANondatalinklayer?A.Thenetidis198.B.Thehostidis0.10.…A.RepeaterB.HubC.SwitchD.RouterC.Thenetworkaddressis198.0.0.0D.Thehostidis0.0.1

5、0封…()4．Thecommunicationmethodwhichcantransmitdatabi-directionally(双向)()15．Whenconnectingcomputersviatwistedpairs,theinterfacestandardwetakeis:…onthesamechannelatthesametimeiscalled:A.X.25B.RJ11C.RS232D.RJ45…A.simplexB.halfduplexC.fullduplexD.noneoftheabove…()16．WhichofthefollowingistrueaboutIPro

6、uting?…()5．10Base5networktakes:A.ThedestinationIPaddresschangesateachhop.○A.thickcoaxialcable,startopologyB.thickcoaxialcable,bustopology…B.ThesourceIPaddresschangesateachhop.C.thincoaxialcable,startopologyD.thincoaxialcable,bustopology…C.Theframedoesnotchangeateachhop.…()6．Whentwocomputerscommu

7、nicateviaaLAN,whichofthefollowing…deviceisnecessary?D.Theframechangesateachhop.线A.networkadapterB.MODEMC.repeaterD.coaxialcable()17．Whichofthefollowingrangesisconsideredaswell-knownportnumber?……()7．Ifapackageistobebroadcaste