计算机网络题库大连交通大学chapter4Word格式文档下载.docx
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B.sourceIPaddress
C.destinationMACaddress
D.sourceMACaddress
6.IPbelongsto____layer?
A.transport
B.network
C.datalink
D.physical
7.Whichlayerprovideshost-to-hostservices?
D.physical
8.Whichlayerprovidesaconnectionservicecalledvirtual-circuitnetworksandaconnectionlessservicecalleddatagramnetworks?
9.IPV4hasa___bitaddress?
A.48
B.16
C.32
D.64
10.MACaddressis____bits?
11.TheInternet’snetworklayerhasthreemajorcomponents,thefirstcomponentistheIPprotocol,thesecondcomponentistheroutingprotocol,thefinalcomponentis____?
A.forwarding
B.addresstranslation
C.check
D.ICMP
12.HowmanybitsspecifytheIPprotocolversioninadatagram?
A.1bit
B.2bits
C.4bits
D.8bits
13.MostIPV4datagramdonotcontainoptionfield,howmanybytesaheaderhasinatypicalIPdatagram?
A.4bytes
B.8bytes
C.16bytes
D.20bytes
14.HowmanybitsusedinIPdatagramexpresstotallengthoftheIPdatagram?
A.4bits
B.8bits
C.16bits
D.20bits
15.Data-gramsarerarelylargerthan____?
A.1500bytes
B.65535bytes
C.500bytes
D.1024bytes
16.NewversionofIP----IPV6doesnotallowfragmentin____?
A.Router
B.Host
C.Bothofabove
D.Noneofabove
17.HowdoestheTTLchangedbyoneeachtimethedatagramisprocessedbyarouter?
A.decrease
B.increase
C.nochange
D.always0
18.WhichlayerprotocolisindicatedbythevalueofprotocolfieldinIPdatagram?
A.application
B.transport
C.network
D.datalink
19.IPoptionisdroppedinthe____header.()
A.IPv6
B.IPv4
C.TCP
D.UDP
20.ThedatafieldinIPdatagramcancarrymanytypesofdataexcept____.()
A.TCP
B.UDP
C.ICMP
D.MAC
21.ICMPisusedfor____?
A.Reliabledatatransfer
B.Errorreporting
C.Flowcontrol
D.Congestioncontrol
22.SupposeyoureceiveanIPdatagramfromonelinkandcheckyourforwardingtabletodeterminetheoutgoinglink,butthisoutgoinglinkhasanMTUthatissmallerthanthelengthofIPdatagram.Whichtechnologywillbeused?
A.resend
B.discard
C.fragment
D.none
23.ThedesignerofIPv4decidedtoputthejobofdatagramreassemblyin____.()
A.router
B.switch
C.hub
D.endsystem
24.IPaddressingassignsanaddressto223.10.198.250/29,thenetworkaddressforthisnetworkis____.()
A.223.10.198.248
B.223.10.198.250
C.223.10.198.0
D.223.10.0.0
25.Ifalldata-gramsarrivingattherouterfromWANhavethesamedestinationIPaddress,thenhowdoestherouterknowtheinternalhosttowhichitshouldforwardagivendatagram?
Thetrickistouse____tableatrouter,andincludeportnumbersaswellasIPaddressinthetableentries.()
A.routing
B.forwarding
C.ARP
D.NATtranslation
26.WhenrunningaTelnet,FTP,orHTTPsession,youmayhaveencounteredanerrormessagesuchas“Destinationnetworkun-reachable”,Thismessagehaditsoriginin____.()
A.IGMP
B.EGP
D.BGP
27.Thewell-knownpingprogramsendsan(a)____type8code0messagetothespecifiedhost.Thedestinationhostsseeingtheechorequest,sendbackatype0code0ICMPechoreply.()
A.ICMP
B.IGMP
28.Tracer-outisimplementedwith____messages.()
B.TCP
C.UDP
29.ThestandardTracer-outprogramactuallysendssetsof____packetswiththesameTTL.()
A.one
B.two
C.three
D.four
30.IPv6increasesthesizeoftheIPaddressfrom32bitto____bit.()
A.64
B.128
C.256
D.512
31.HowmanybytesarethereinheaderofIPv6?
A.8
B.20
C.40
D.32
32.IPv6doesnotallowforfragmentationandreassemblyatinter-media____.()
A.routers
B.switches
C.endsystem
D.hubs
33.Fromsendertoreceivers,allpacketswilltakethesamepath,thisisweusea____service.()
A.datagram
B.VC
C.circuit
D.Ethernet
34.____meansmovingpacketsfromrouter’sinputporttoappropriaterouteroutputport?
B.filtering
C.routing
D.switching
35.____meansdeterminingroutetakenbypacketsfromsourcetodestination?
36.Arouterworksin____layer?
A.Networking
B.Datalink
C.Application
D.Physical
37.Aswitchworksin____layer?
38.Networkinglayerprovidesservicesbetweentwo____.()
A.Hosts
B.Processes
C.Applications
D.Machines
39.Linklayerprovidesservicesbetweentwo____.()
40.Theinternet’snetworklayerprovidesasingleservice----thatis____.()
B.Flowcontrol
C.Congestioncontrol
D.Best-effort-service
41.Datagramnetworkprovidesnetwork-layer____.()
A.connectionlessservice
B.connectionservice
C.bothofabove
D.neitherofAandB
42.VCnetworkprovidesnetwork-layer____.()
43.InVCnetwork,eachpacketcarries____.()
A.VCidentifier
B.destinationhostaddress
C.IPaddress
D.Macaddress
44.AVCconsistsofthreepart,thisthreepartsdonotinclude____.()
A.Pathfromsourcetodestination
B.VCnumbers,onenumberforeachlinkalongpath
C.Entriesinforwardingtablesinroutersalongpath
D.Destinationaddress
45.In____networking,aseriesofpacketmayfollowdifferentpathsandmayarriveoutoforder?
A.Datagram
B.VC
C.TCP
46.Theinternetisa(an)____network?
C.Bothofabove
47.Thefourcomponentsofarouterdonotinclude____?
A.Inputandoutputports
B.Switchfabric
C.Routingprocessor
D.Switchingprocessor
48.Therearethreekindsofswitchfabricforarouternormally,thosethreeswitchfabricdonotincludes____?
A.Switchingviamemory
B.Switchingviaabus
C.SwitchingviaanInterconnection-Network
D.Packetswitching
49.Whichofthefollowingprotocolisusedforerrorreporting?
A.ICMP
B.TCP
C.IP
50.Whichofthefollowingisnotaroutingprotocol?
A.TCP
B.RIP
C.OSPF
51.IPV4hasa___bitsaddress?
A.32
B.64
C.16
D.128
52.IPaddressisidentifierfor____.()
A.Host
B.Routerinterface
53.“233.1.1.0/24”,wherethe/24notation,sometimesknownasa____.()
A.Subnetmask
B.Networkingaddress
C.Hostaddress
54.Subnetswithan8-,____-,and24-bitsubnetaddresseswereknowasclassA,B,andCnetworksrespectively.()
A.9
B.10
C.12
D.16
55.IPV6hasa___bitsaddress?
56.____meansthatIPv6nodesalsohaveacompleteIPv4implementationaswell?
A.Dualstack
B.Tunneling
C.Bridgeconnection
D.Forwarding
57.____meansthatIPv6carriedaspayloadinIPv4data-gramamongIPv4routers?
58.Typicallyahostisattacheddirectlytoonerouter,the____forthehost.()
A.Defaultrouter
B.Sourcerouter
C.Destinationrouter
D.Corerouter
59.Thedefaultrouterofthesourcehostisknownas____.()
60.Thedefaultrouterofthedestinationhostisknownas____.()
61.Apathbetweenthesourceanddestinationthathasbeastcostisknownas____.()
A.Leastcostpath
B.Shortestpath
C.Largestcostpath
62.Thepathwiththesmallestnumberoflinksbetweenthesourceandthedestinationisknownas____.()
63.WhichoffollowingaboutDVisnotcorrect?
A.Iterative
B.Synchronous
C.Distributed
D.Self-terminating
64.Whichofthefollowingisnotintra-ASroutingprotocol?
A.RIP
B.OSPF
C.IGRP
D.BGP
65.RIPisakindof____algorithm.()
A.DV
B.LS
D.NeitherofAandB
66.OSPFisakindof____algorithm.()
67.Therouterinnon-backboneareasandperformonlyintra-ASroutingisknownas____.()
A.Internalrouters
B.Areaborderrouters
C.Backbonerouters
D.Boundaryrouters
68.____“summarize”distancestonetsinownarea,advertisetootherAreaBorderrouters.()
69.____runsOSPFroutinglimitedtobackbone.()
70.____connecttootherAS’s.()
71.Whichofthefollowingisaninter-autonomoussystemroutingprotocol?
72.____meanssendi