CCNA认证考试真题doc.docx
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CCNA认证考试真题doc
CCNA认证考试真题
（1）TCP/IPAddressingandProtocol
1:
YourjuniornetworkadministratorwantstoknowwhatthedefaultsubnetmaskisforaClassCIPaddress.Whatdoyoutellhim?
A.255.0.0.0
B.255.255.0.0
C.255.245.255.0
D.255.255.255.0
E.255.255.255.255
2:
Anapplicationneedstohavereliable,end-to-endconnect-ivity.Whichofthefollowingprotocolswillgiveyoureliableconnectivity?
A.TCP
B.UDP
C.IP
D.ICMP
3:
Youaredesigninganetwork,whichneedstosupport55users.Youdon'tplantoextendthesegmentbeyondthecurrentnumberofusers.Whichsubnetmaskwouldbestmeetyourneeds?
A.255.255.0.0
B.255.255.255.0
C.255.255.255.192
D.255.255.255.160
4:
Youhaveaddedanewswitchtoyournetwork.Youwanttomanageitremotely,soyouneedtoassignitanIPaddress.YourrouterthatconnectstotheswitchhasanIPaddressof172.16.12.33/27.Whichofthefollowingaddressescanyouassigntothisswitch?
A.172.16.12.33/28
B.172.16.12.32/27
C.172.16.12.33/27
D.172.16.12.34/27
E.172.16.12.35/28
F.172.16.12.38/28
G.172.16.12.63/27
5:
Theaddress172.16.208.16/20isahostaddressinwhichofthefollowingsubnets?
A.172.16.176.0–255.255.240.0
B.172.16.192.0–255.255.240.0
C.172.16.208.0–255.255.240.0
D.172.16.224.0–255.255.240.0
6:
YouaredesigninganIPaddressschemeforyourbrandnewremoteoffice.ThevicepresidentofITcallstotellyouthatyouwillbeinchargeofthe192.168.1.64/26subnetwork.Thissuppliesyouwithasinglesubnetworkwith62hosts.Youneedtohaveatleasttwosubnetswith14hostsineachsubnet.Whatcustomsubnetmaskshouldyouuse?
A.255.255.255.128
B.255.255.255.192
C.255.255.255.224
D.255.255.255.240
E.255.255.255.248
7:
Youhavesubnettedthe210.106.14.0networkwitha/24mask.YourbossatAcme,Inc.wantstoknowhowmanyusablesubnetworksandusablehostaddressespersubnetthiswouldprovide.Whatshouldyoutellher?
A.Onenetworkwith254hosts
B.Twonetworkswith128hosts
C.Fournetworkswith64hosts
D.Sixnetworkswith30hosts
8:
Identifythreevalidhostaddressesinanysubnetofthe201.168.27.0network,assumingafixedsubnetmaskof255.255.255.240.（Choosethree.）
A.201.168.27.33
B.201.168.27.112
C.201.168.27.119
D.201.168.27.126
E.201.168.27.175
F.201.168.27.208
9:
WhatisthesubnetworkaddressforahostwiththeIPaddress201.100.5.68/28?
A.201.100.5.0
B.201.100.5.32
C.201.100.5.64
D.201.100.5.65
E.201.100.5.31
F.201.100.5.1
10:
Whichofthefollowingprotocolsusesathree-wayhandshakemechanismtoestablishsessions?
A.TCP
B.IP
C.UDP
D.IPX
E.Framerelay
11:
Whichofthefollowingprotocolsisconnection-oriented?
A.TCP
B.IP
C.IPX
D.Framerelay
12:
YouareusinganapplicationonyourWindows2000clientmachinesthatprovideserrorcorrection.Youneedaprotocoltoprovidefasttransport.Whichprotocolshouldyourapplicationuse?
A.TCP
B.IP
C.UDP
D.SPX
E.AppleTalk
13:
WhenusingTCP,afterasessionisopen,theapplicationscanadjustthenumberofsegmentstheyreceivebeforesendinganacknowledgment.Thisbehaviorisknownas______________.
A.MTUadjustment
B.Windowing
C.FlexibleSendPath
D.FCS
14:
Ifthedestinationdidnotreceiveasegment,howwilltheTCPhostknowtoresendtheinformation?
A.TheACKreceivedwillnotincludethesegmentnumberthatwasnotreceived.
B.TheACKreceivedwillincludethesegmentnumberthatwasnotreceived.
C.ThesendinghostwillsendaPACKtoverifysegmentreceipt.
D.ThedestinationhostwillsendaYACKmessagebacktothesendinghost.
15:
Youareplanningonusingasinglenetworkthatsupports208users.WhichIPaddressclasswouldyouchoosetobethemostefficient?
A.ClassA
B.ClassB
C.ClassC
D.ClassD
E.ClassE
16:
RFC1918definestheprivateIPaddressranges.WhichofthefollowingIPaddressesareconsideredpartoftheseranges?
（Choosethree.）
A.10.23.45.67
B.126.21.34.56
C.172.16.32.1
D.172.31.234.55
E.192.169.4.5
17:
Anewnetworkisbeingdesignedforyourcompany,Acme,Inc.IfyouuseaClassCIPnetwork,whichsubnetmaskwillprovideoneusablesubnetperdepartmentwhileallowingenoughusablehostaddressesforeachdepartmentspecifiedinthetable?
Department
NumberofUsers
Corporate
CustomerSupport
Financial
Engineering
A.255.255.255.0
B.255.255.255.192
C.255.255.255.224
D.255.255.255.240
E.255.255.255.248
18:
Whichoftheseprotocolsprovidesdatatransport,relyingontheerrorcorrectioncapabilitiesoftheapplicationitself?
A.UDP
B.TCP
C.SNMP
D.ICMP
19:
WhichofthefollowingareusedbyTCPtoensurereliabledeliveryofdata?
（Choosetwo.）
A.MACaddressresolution
B.Sequencenumbers
C.Acknowledgments
D.Ping
E.Routingupdates
20:
YoudiscoverthatyouareabletoadjustthewindowsizeoftheTCPsegment.Youincreasethewi
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