《计算机网络》习题

《《计算机网络》习题》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Chapter1ComputerNetworksandtheInternet1.The(A)isaworldwidecomputernetwork,thatis,anetworkthatinterconnectsmillionsofcomputingdevicesthroughouttheworld.A.publicInternetB.IntranetC.switchnetD.televisionnet2.(D)Whichkindofmediaisnotaguidedmedia?A.twisted-paircopperwir

2、eB.acoaxialcableC.fiberopticsD.digitalsatellitechannel3.Whichkindofmediaisaguidedmedia?(C)A.geostationarysatelliteB.low-altitudesatelliteC.fiberopticsD.wirelessLAN4.Theunitsofdataexchangedbyalink-layerprotocolarecalled(A).A.FramesB.SegmentsC.DatagramsD.bitstreams5.

3、Whichofthefollowingoptionbelongstothecircuit-switchednetworks?(D)A.FDMB.TDMC.VCnetworksD.bothAandB6.(B)makessurethatneithersideofaconnectionoverwhelmstheothersidebysendingtoomanypacketstoofast.A.ReliabledatatransferB.FlowcontrolC.CongestioncontrolD.Handshakingproce

4、dure7.(A)meansthattheswitchmustreceivetheentirepacketbeforeitcanbegintotransmitthefirstbitofthepacketontotheoutboundlink.A.Store-and-forwardtransmissionB.FDMC.End-to-endconnectionD.TDM8.Datagramnetworksandvirtual-circuitnetworksdifferinthat(C).A.datagramnetworksare

5、circuit-switchednetworks,andvirtual-circuitnetworksarepacket-switchednetworks.B.datagramnetworksarepacket-switchednetworks,andvirtual-circuitnetworksarecircuit-switchednetworks.C.datagramnetworksusedestinationaddressesandvirtual-circuitnetworksuseVC.numberstoforwar

6、dpacketstowardtheirdestination.D.datagramnetworksuseVC.numbersandvirtual-circuitnetworksusedestinationaddressestoforwardpacketstowardtheirdestination.9.Inthefollowingoptions,whichoneisnotaguidedmedia?(D)A.twisted-pairwireB.fiberopticsC.coaxialcableD.satellite10.Pro

7、cessingdelaydoesnotincludethetimeto(B).A.examinethepacket’sheaderB.waittotransmitthepacketontothelinkC.determinewheretodirectthepacketD.checkbit-errorinthepacket11.Inthefollowingfourdescriptions,whichoneiscorrect?(C)A.Thetrafficintensitymustbegreaterthan1.B.Thefrac

8、tionoflostpacketsincreasesasthetrafficintensitydecreases.C.Ifthetrafficintensityisclosetozero,theaveragequeuingdelaywillbeclosetozero.D.Ifthetraf