CCNA考试自测题第1卷及答案.docx
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CCNA考试自测题第1卷及答案
CCNA考试自测题第1卷及答案
下面的问题将帮助你评价你在本章中学习到的内容。
仔细阅读所有的选项，因为正确答案可能多于1个。
选择每个问题中所有的正确答案。
1）Matchthefollowingapplicationlayerservicestotheircorrespondingtransportlayerprotocolport.（匹配下列的应用层服务和它们对应的传输层协议端口）：
A.SMTP1.TCP/23
B.FTP2.TCP/25
C.TFTP3.TCP/80
D.Telnet4.TCP/21
E.HTTP5.UDP/69
F.DNS6.TCP/53
2）WhichOSIreferencemodellayerdoesTelnetfunctionat（Telnet在哪一个OSI参考模型层运作）？
A.Transport
B.Network
C.Session
D.Application
3）HowmanylayersdoestheTCP/IPprotocolsuitehave,comparedtotheOSIreferencemodel（和OSI参考模型相比，TCP/IP协议具有几层）？
A.TCPmodelhas4,OSImodelhas6
B.TCPmodelhas7,OSImodelhas8
C.TCPmodelhas4,OSImodelhas7
D.TCPmodelhas7,OSImodelhas4
4）TheTCP/IPprotocolsuitehasaformalsessionlayerthatincludesNetBIOS、RPCsandTLIfunctions（TCP/IP协议套件具有包含NetBIOS、RPC和TLI功能的一个正式的会话层）。
A.True
B.False
5）WhatisthefunctionofRPCs（RPC的功能是什么）？
A.TomovefilesfromremotePCstoalocalPC
B.Tomakeremotefunctioncallstransparent,sotheyappeartobelocal
C.ToinitializeaprogramonaremotePC
D.Tosendaprocedurethatislocaltoaremotenodeforprocessingelsewhere
6）WhatdoesRPCstandfor（RPC代表什么）？
A.Remotepersonalcomputer
B.Reserved-programmingcall
C.Routed-procedurecall
D.Remote-procedurecall
7）WhatOSIreferencemodellayerdosocketsfunctionat（套接字在OSI参考模型的哪层运作）？
A.Application
B.Presentation
C.Session
D.Transport
E.Network
F.Datalink
G.Physical
8）Whatfunctiondosocketsperform（套接字的功能是什么）？
A.Theymakeremotefunctionsappearlocal,transparenttotheuser
B.Theytransferfilestoandfromremotenodes
C.Theymakethetransportlayerindependent
D.Theyallowmultipleapplicationstosharethesameconnectiontothenetwork
9）WhatisWinSock（什么是WinSock）？
A.AversionofsocketsfortheMicrosoftWindowsplatform
B.SocketsonBSDUNIX
C.AsessionlayerAPIcommonlyconsideredtobeitsownprotocol
D.AnetworklayerserviceforMicrosoftWindows
10）WhatdoesTLIdo（TLI的作用是什么）？
A.Itmakesremotefunctionsappearlocal,transparenttotheuser
B.Ittransfersfilestoandfromremotenodes
C.Itmakesthetransportlayerindependent
D.Itallowsmultipleapplicationstosharethesameconnectiontothenetwork
11）WhatOSIlayerdoesNetBIOSfunctionat（NetBIOS在OSI哪一层运作）？
A.Application
B.Presentation
C.Session
D.Transport
E.Network
F.DataLink
G.Physical
12）WhichprotocolscanNetBIOSbindto?
（Selectallthatareapplicable.）（NETBIOS可以绑定在哪个协议上，选择所有可能的协议）？
A.Appletalk
B.IPX
C.IP
D.NetBEUI
13）WhatlayersdonotexistintheTCP/IPmodelthatareintheOSImodel（哪层不在TCP/IP模型中，但它在OSI模型中）？
A.Application,presentation,andnetwork
B.Presentation,session,anddatalink
C.Session,network,andphysical
D.Presentation,datalink,andphysical
14）Whatisasocketinthetransportlayer（传输层中的套接字是什么）？
A.ThesocketisanIPaddressplusaport
B.AnAPIthatmakesthetransportlayerindependent
C.AnAPIthatallowsmultipleapplicationstoshareanetworkconnection
D.Afunctionthatmakesremoteproceduresappeartobelocal
15）Whatisaport（什么是端口）？
A.AnAPIthatmakesthetransportlayerindependent
B.AnAPIthatallowsmultipleapplicationstoshareanetworkconnection
C.Afunctionthatmakesremoteproceduresappeartobelocal
D.Thepointwhereupper-layerprocessesaccesstransportlayerservices
16）Whichofthefollowingservicesusesaprocesscalledwindowing（下面的哪一个服务使用了所谓的窗口机制）？
A.Reliabledatatransfer
B.Connection-orientedvirtualcircuit
C.Bufferedtransfer
D.Resequencing
E.Multiplexing
F.Efficient,full-duplextransmission
G.Flowcontrol
17）WhatisUDP（什么是UDP）？
A.AnAPIthatmakesthetransportlayerindependent
B.Aconnectionless,unreliabletransportprotocol
C.AnAPIthatallowsmultipleapplicationstoshareanetworkconnection
D.Afunctionthatmakesremoteproceduresappeartobelocal
18）WhatisIP（什么是IP）？
A.Itisthetransportmechanismforupperlayerservices
B.ItisthesessionlayerAPIformakingthetransportlayerindependent
C.Itisthenetworklayerprotocolthatmovesdatafromonenodetoanother
D.ItisthephysicallayerprotocolforInternetconnections
19）WhatisICMP（什么是ICMP）？
A.Itisanetworklayerprotocolthathandlescontrolmessages
B.Itisanetworklayerprotocolthatresolvesaddresses
C.ItisasessionlayerAPIthatmakesremoteprocedurestransparenttoauser
D.Itisatransportlayerfunctionforunreliabletransport
20）PingsendsanICMPechocommandtoanIPaddressinordertodeterminewhetheranetworkconnectionexiststothatnode（Ping向一个IP地址发送了一个ICMP回送命令，目的是确定是否存在到那个节点的网络连接）？
A.True
B.False
21）WhichofthefollowingbestdescribesTCP/IP（下面的哪句话最准确地说明了TCP/IP）？
A.Astaticprotocol
B.Aproprietaryprotocol
C.Acollectionofinternetworkingprotocols
22）UDPandTCPrepresentmechanismsusedbywhichlayeroftheTCP/IP（UDP和TCP表示了TCP/IP的哪层使用的机制）？
A.Datalinklayer
B.Physicallayer
C.Presentationlayer
D.Transportlayer
23）RPCsprovidewhichofthefollowing（RPC提供了下面的哪个功能）？
A.Connection-orientedsession
B.Transparencytomakeremotecallslooklocal
C.Portabilityofapplicationsbetweenheterogeneoussystems
D.AandConly
E.BandConly
F.A,B,andC
24）DistributedComputingEnvironment（DCE）isanexampleof（分布式计算环境（DEC）是下面的哪一项的一个例子）？
A.OSImodel
B.RPCimplementation
C.ExtremeDataRepresentation
D.AandB
25）WhichstatementistrueofWinSock（下面对WinSock的哪一句陈述是正确的）？
A.ItisaMACapplication
B.Itrepresentsagraphicaluserinterface
C.Itrepresentsanetworklayer
D.ItprovidesthemeansforsharinganInternetconnectionbetweenmultipleIPprotocol suiteutilities
26）WhichstatementistrueofTLI（下面关于TLI的哪一句陈述是正确的）？
A.ItisalayerintheOSImodel
B.ItisalayerintheTCP/IPmodel
C.ItisaSystemVAPI
D.ItispartoftheUNIXKernel
27）WhichstatementistrueofWindowsNameServer（WINS）（下面对于Windows命名服务器（WINS）的陈述中，哪一句是正确的）？
A.Itisaprotocol
B.Itprovidescapabilityfornameresolution
C.Itisanetworklayer
D.Itisaproprietarynameserver
E.A,B,andDonly
F.BandDonly
28）ICMP、IP、ARPandRARPoftheIPprotocolsuitemapto（IP协议套件的ICMP、IP、ARP和RARP映射到）：
A.OSIlayers1and2
B.OSIlayer5
C.OSIlayer3
D.OSIlayer2
29）Whichlayerismostimportantinprovidingreliabledataexchangebetweentwosystems（在两个系统之间提供可靠的数据交换中，哪一层是最重要的）？
A.Physicallayer
B.Datalinklayer
C.Sessionlayer
D.Transportlayer
30）WhichofthefollowingdoesTCPprovide（TCP提供了下面的哪一个功能）？
A.Unreliabledatastream
B.Connectionlessvirtualcircuit
C.Flowcontrol
D.Structuredbytestreammovement
31）Ofthefollowing,whichfieldisnotapartoftheTCPheader（在下面各项中，哪一个字段不是TCP报头的一部分）？
A.Subnetmask
B.Sequencenumber
C.Dataoffset
D.Destinationport
32）WhatisthesequencenumberinaTCPheaderusedfor（在TCP报头中的顺序号的作用是什么）？
A.Acknowledgments
B.Reorderingoftheoctetsreceived
C.Rejectingduplicateoctets
D.Alloftheabove
33）VariableslidingwindowsprovideanexplicitmechanismfornotifyingTCPifanintermediatenode（forexample,arouter）becomescongested（在中间节点，例如一个路由器拥塞的情况下，可变滑动窗口提供了通知TCP的显式机制）。
A.True
B.False
34）WhichofthefollowingparametersisnotapartofUDPheader（下面的哪一个参数不是UDP报头的一部分）？
A.Sourceport
B.Urgentpointer
C.Checksum
D.Length
E.Destinationport
35）WhenarouterhasbeenconfiguredforUDPflooding,thesourceaddressmightchange,butthedestinationaddresswillnotchangeasthedatagrampropagatesthroughthenetwork（当一个路由器已经配置为UDP泛洪时，当数据报在网络上传播的过程中，源地址可能改变，但是目的地址不会改变）？
A.True
B.False
36）Thespanning-treealgorithmallows（生成树算法允许）：
A.Forwardingofpacketswithnocontrol
B.Forwardingofbroadcaststoaninterfacewhichalreadyhasreceivedthebroadcast
C.Preventionofduplicationofforwardingofpackets
D.AandBonly
37）IPhelperaddressesareaformof______________addressingandrequirethecommandspecificationof_________oneveryinterfacereceivingbroadcaststhatneedtobeforwarded（IP辅助地址是一种什么类型的寻址方法，在每一个接收到需要转发的广播接口上需要什么命令说明）？
A.Static/IPheaderaddress
B.Dynamic/IPforward-protocolUDP
C.Dynamic/IPforward-protocolTCP
38）Whichofthefollowingprotocolsprovideaddressresolution（下面的哪一个协议提供了地址解析）？
A.ICMP
B.RARP
C.IP
D.UDP
E.TCP
39）IPisdescribedasanunreliablemechanismbecauseitdoesnotguaranteedelivery（IP被认为是不可靠的机制，因为它不保证发送）。
A.True
B.False
40）WhatdoesfragmentationinTCP/IPrepresent（在TCP/IP中的分段代表什么）？
A.Segmentingofdatagramsinto53-bytepacketsforATMapplications
B.Divisionoflargerdatagramsintoconvenientsizepackets
C.Aprocessthatoccursonarouter
D.A,B,andC
E.AandConly
F.BandConly
41）WhichofthefollowingstatementsistrueofARP（下面对ARP的陈述中，哪一个是正确的）？
A.ItmakesaMACaddresslogicallyindependentofthephysicalhardware
B.ItmakesitnecessaryfortheadministratortophysicallymanagetheMACad
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