网络工程计算机网络原理参考复习题四有答案Word格式.docx

网络工程计算机网络原理参考复习题四有答案Word格式.docx

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（Selectallvalidanswers）BC

A.TCP

B.Telnet

C.FTP

D.ARP

E.IP

F.Noneoftheabove

4Whichthreeoftheprotocolsbelowbelongtotheapplicationlayer?

（Selectthreeanswerchoices）BCE

A.ARP

B.HTTPS

C.SMTP

D.CDP

E.TFTP

F.ICMP

5InwhichSpanning-TreestatesdoesaswitchportlearnMACaddresses?

（Select

two）CD

A.Blocking

B.Listening

C.Forwarding

D.Learning

E.Relaying

6WhichOSIlayerisassociatedwiththefollowing:

Theacknowledgementoftransmissions,sequencing,andflowcontrolacrossanetwork?

（chooseone）C

A.Layer2

B.Layer3

C.Layer4

D.Layer5

E.Layer6

F.Layer7

7Refertothegraphic.Two2950switchesconnectthroughportsFa0/24anda

straight-throughcable.Basedontheoutputoftheshowcdpneighborcommand

frombothswitchesandtheinformationgiven,whatcanbeconcluded?

A.PortFa/24oneachswitchmustbeconfiguredinVLAN1inorderfortheswitchesto

seeneighborinformation.

B.PortFa0/24oneachswitchmustbeconfiguredasatrunkportinorderforneighbor

informationtobereceived.

C.Theswitchesarenotcabledproperly.

D.AnIPaddressneedstobeassignedtobothswitches.

E.VTPisincorrectlyconfiguredonswitchTK1.

8Whichoftheprotocolsbelow,operatesatLayer2oftheOSImodel,andisusedtomaintainaloop-freenetwork?

（chooseone）B

A.RIP

B.STP

C.IGRP

E.VTP

9YouhavesetupanInternetbasedFTPserver,wherepeoplecanuploadanddownloadfiles.IntermsoftheOSImodel,whatisthehighestlayerusedduringtheFTPsessions.A

A.Application

B.Presentation

C.Session

D.Transport

E.Internet

F.DataLink

G.Physical

10FourTestKingswitchesareconnectedtogetherasshowninthediagrambelow:

StudytheExhibitcarefully.WhatisthepurposeoftheSpanningTreeProtocolthat

isoperatingintheexhibitedswitchtopology?

B

A.Toelectaparticularswitchasbackupdesignatedswitch.

B.TohaveoneactiveLayer2paththroughtheswitchesnetwork.

C.Toselectthebestpathtoaremotedestinationthatisonadifferentnetwork.

D.TolearntheMACaddressesofhostattachedtotheswitchesnetwork.

E.TodistributeVLANconfigurationinformationthroughouttheswitchednetwork.

11WhichOSIlayerheadercontainstheaddressofadestinationhostthatisanothernetwork?

E

A.application

B.presentation

C.session

D.transport

E.network

F.datalink

G.physical

12Inthecommunicationsindustry,whatarethefeaturesandbenefitsofusingthelayeredOSImodel?

（Selectthetwobestanswers）AD

A.Itencouragesindustrystandardizationbydefiningwhatfunctionsoccurateachlayerofthemodel.

B.Itnecessitateschangesinfunctionalityinonelayertootherlayers.

C.Itenablesequipmentefficiencyfromdifferentvendorstousethesameelectroniccomponents.

D.Itdividesthenetworkcommunicationprocessintosmallerandsimplercomponents,thusaidingcomponentdevelopment,design,andtroubleshooting.

E.Itsupportstheevolutionofmultiplecompetingstandards,andthusenhancesbusinessequipmentmanufacturingopportunities.

13Whichofthestatementsbelowaretrueregardingtheavailabilityofbandwidthonanetwork?

（Selectallthatapply.）CD

A.Bandwidthavailabilityisdecreasing.

B.Bandwidthavailabilityisinfinite.

C.Bandwidthisusedwhenanalyzingnetworkperformance.

D.Bandwidthavailabilityisfinite.

E.Bandwidthavailabilityisfixed.

14Whichoneofthefollowingisthemostcommonlyusedlayer2networkdevice?

C

A.Hub

B.Bridge

C.Switch

D.Router

E.Repeaters

15.ACorporationoffice'

snetworktopologyisshowninthediagrambelow:

16HostPC1needstocommunicationswiththee-mailservershownabove.

WhataddresswillbeplacedonthedestinationaddressfieldoftheframewhenitleaveshostPC1?

A.TheMACaddressofPC1

B.TheMACaddressofswitchSwitch1

C.TheMACaddressofthefa0/0interfaceoftherouter.

D.TheMACaddressoftheEth1/0interfaceoftherouter.

E.TheMACaddressofswitchTestKing2

F.TheMACaddressoftheemailserver

17.WhichofthefollowinglayersoftheTCP/IPmodelmostcloselycorrespondstothenetworklayeroftheOSImodel?

B

B.Internet

C.Transport

D.Network

E.DataLink

18YouhaveanEthernetnetwork.Whichoftheconditionsbelowcanleadtoincreased

congestiononyournetwork?

（Selecttwoanswerchoices）DF

A.TheuseofFull-DuplexMode.

B.TheCreationonNewCollisionDomains.

C.TheCreationonNewBroadcastDomains.

D.TheAdditionofHubstotheNetwork.

E.TheuseofswitchesintheNetwork.

F.TheAmountofARPorIPXSAPTraffic.

19Whatisthepurposeofthespanning-treealgorithminaswitchedLAN?

C

A.Toprovideamonitoringmechanismfornetworksinswitchedenvironments.

B.TomanageVLANsacrossmultipleswitches.

C.Topreventswitchingloopsinnetworkswithredundantswitchedpaths.

D.Tosegmentanetworkintomultiplecollisiondomains.

E.Topreventroutingloopsinnetworks.

20ACorporationLANisdisplayedinthediagrambelow:

21HostBsendsaframetohostC.Whatwilltheswitchdowiththeframe?

A.Droptheframe

B.Sendtheframeoutallportsexceptport0/9

C.ReturntheframetohostB

D.SendanARPrequestforhostC

E.SendanICMPHostUnreachablemessagetoHostB

F.RecordthedestinationMACaddressintheswitchingtableandsendtheframedirectlytoHostC

22.TheCorporationLANconsistsof6switchesconnectedtogetherasshowninthediagrambelow:

23Whatisthenameofthepotentialproblemofthisswitchsetup,andwhatprotocol

canpreventsitsoccurrence.（Selectonlyoneanswerchoice）F

A.routingloops,holddowntimers

B.switchingloops,splithorizon

C.routingloops,splithorizon

D.switchingloops,VTP

E.routingloops,STP

F.switchingloops,STP

24YouhavebeencontractedbyTestKingtoreplacethenetworkcablingoftheir

LAN'

s.TheSystemAdministratorgivesyouspecificinstructionsthatheneedsto

usecablingintheLANthatisNOTsusceptibletoEMI.

Whatkindofcablewouldyouusetosatisfytheadministrator'

sneeds?

E

A.Thicknetcoaxialcable.

B.Thinnetcoaxialcable.

C.Category5UTPcable.

D.Category5STPcable.

E.Fiberopticcable.

F.Alloftheabove

25.WhichtwoofthefollowingvaluesdoesSTPtakeintoconsiderationwhenitelectstherootbridge?

（Selecttwoanswerchoices）CE

A.TheBPDUversionnumber

B.Theaccesslayerbridgesetting

C.TheBridgeID

D.Thespanning-treeupdatenumber

E.Thebridgepriority

F.TheVLANnumber

26.WhichoneofthefollowingactionswouldactuallyincreasecongestiononanEthernetnetwork?

A.Increasingthenumberofcollisiondomains.

B.Micro-segmentingthenetwork.

C.Addinghubsforconnectivitytothenetwork.

D.Puttingadditionalswitchesinthenetwork.

E.ImplementingVLANsinthenetwork.

27WhatistheIEEEstandardassociatedwithGigabitEthernet?

（Selecttwoanswer

choices）CE

A.802.11

B.802.5

C.802.3ab

D.802.3ae

E.802.3z

F.802.3u

28.InaswitchedLANnetwork,whatistheSpanning-Treealgorithmusedfor?

A.Itisusedtoprovideamechanismforroutingupdatesinswitchedenvironments.

B.Itisusedtopreventroutingloopsinnetworkswithredundantroutes.

C.Itisusedtopreventswitchingloopsinnetworkswithredundantswitchedroutes.

D.Itisusedtomanage,theaddition,deletion,andnamingofVLANsacrossmultipleswitches.

E.Itisusedtosegmentanetworkintomultiplecollisiondomains.

F.Noneoftheabove.

G.AlloftheabovearefunctionsofSTP.

29.Onahalf-duplexEthernetLAN,twohostsattempttosenddatasimultaneously,resultinginacollision.Followingthiscollision,whatwillthehostsdo?

（Selectallvalidanswers）C

A.Thedestinationhostsendsarequesttothesourceforretransmission.

B.Thehostswillattempttoresumetransmissionafteratimedelayhasexpired.

C.Thehostswilldonothing,asthehigherlayersareresponsiblefordataerrorcorrectionandre-transmission.

30.Whyisfull-duplexEthernetsuperiortoitssingle-duplexcounterpart?

（Selecttwoanswerchoices.）BD

A.Itusesinexpensivehubs

B.Itoperateswithoutcollisions

C.Itoperatesonswitches

D.Itprovidesfasterdatatransfer

E.Itutilizesfewerwiringpairs

31Whichofthefollowingstatementscorrectlydescribethedifferencesbetween

half-duplexandfull-duplexEthernet?

（Selecttwoanswerchoices.）BD

A.Full-duplexEthernetusesCSMA/CDtopreventcollisions.

B.Half-duplexEthernetusesaloopbackcircuittodetectcollisions.

C.Afull-duplexEthernetcardallows20Mbpsfordatatransmission.

D.Full-duplexEthernetmakesuseoftwopairsofwiresfordata.

E.AnEthernethubcanoperatebothhalfandfullduplexsimultaneously.

32.Whichofthefollowingstatementscorrectlydescribethedifferencesbetweenhalf-duplexandfull-duplexEthernet?

（Selecttwoanswerchoices