CCNA(640801)真题精选.docx
《CCNA(640801)真题精选.docx》由会员分享，可在线阅读，更多相关《CCNA(640801)真题精选.docx（40页珍藏版）》请在冰点文库上搜索。
CCNA（640-801）真题精选
[多项选择题]
1、Withregardtobridgesandswitches,whichofthefollowingstatementsaretrue?
（）
A.Switchesareprimarilysoftwarebasedwhilebridgesarehardware
based.
B.BothbridgesandswitchesforwardLayer2
broadcasts.
C.Bridgesarefrequentlyfasterthan
switches.
D.Switchestypicallyhaveahighernumberofportsthan
bridges.
E.Bridgesdefinebroadcastdomainwhileswitchesdefinecollision
domains.
F.BothbridgesandswitchesmakeforwardingdecisionsbasedonLayer2
addresses.
参考答案：
B,E,F
[单项选择题]
2、WhichoneofthebinarynumberrangesshownbelowcorrespondstothevalueofthefirstoctetinClassBaddressrange?
（）
A.10000000-11101111
B.11000000-11101111
C.10000000-10111111
D.10000000-11111111
E.11000000-10111111
参考答案：
C
[单项选择题]
3、YouhaveaClassCnetwork,andyouneedten
subnets.Youwishtohaveasmanyaddressesavailableforhostsas
possible.Whichoneofthefollowingsubnetmasksshouldyouuse?
（）
A.255.255.255.192
B.255.255.255.224
C.255.255.255.240
D.255.255.255.248
E.Noneoftheabove
参考答案：
C[单项选择题]
4、WhichoneofthebinarybitpatternsbelowdenotesaClassBaddress?
（）
A.0xxxxxxx
B.10xxxxxx
C.110xxxxx
D.1110xxxx
E.11110xxx
参考答案：
B
[单项选择题]
5、YouhaveaclassCnetwork,andyouneedtodesignitfor5usablesubnetswitheachsubnethandlingaminimumof18hosts
each.Whichofthefollowingnetworkmasksshouldyouuse?
（）
A.225.225.224.0.
B.225.225.240.0.
C.225.225.255.0.
D.255.255.255.224
E.225.225.255.240
参考答案：
D
[单项选择题]
6、ATestKingPChastheIPaddress
172.16.209.10/
22.Whatisthesubnetofthisaddress?
（）
A.172.16.42.0
B.172.16.107.0
C.172.16.208.0
D.172.16.252.0
E.172.16.254.0
参考答案：
C
[多项选择题]
7、WhichofthefollowingIPhostswouldbevalidforPCusers,assumingthata/27networkmaskwasusedforallofthenetworks?
（）
A.15.234.118.63
B.83.121.178.93
C.134.178.18.56
D.192.168.19.37
E.201.45.116.159
F.217.63.12.192
参考答案：
B,C,D
[多项选择题]
8、WhichofthefollowingIPaddressesfallintotheCIDRblockof
115.54.4.0/22?
（）
A.115.54.8.32
B.115.54.7.64
C.115.54.6.255
D.115.54.3.32
E.115.54.5.128
F.115.54.12.128
参考答案：
B,C,E
[单项选择题]
9、InnetworkthatsupportVLSM,whichnetworkmaskshouldbeusedforpoint-to-pointWANlinksinordertoreducewasteofIPaddresses?
（）
A./24
B./30
C./27
D./26
E./32
参考答案：
B
[多项选择题]
10、WhichofthefollowingroutingprotocolssupporttheuseofVLSM（VariableLengthSubnetMasking）?
（）
A.RIPv1
B.EIGRP
C.OSPF
D.IGRP
E.RIPv2
参考答案：
B,C,E
[单项选择题]
11、Youareimplementinganewframerelaynetworktoprovideconnectivitybetweenyou
offices.Todothis,yousetuptheframerelaynetworkusingpoint-to-point
subinterfaces.WhichofthefollowingdoesNOTneedtobeconfigured?
（）
A.TheFrameRelayencapsulationonthephysical
interface.B.ThelocalDLCIoneach
subinterface.
C.AnIPaddressonthephysical
interface.
D.Thesubinterfacetypeaspoint-to-
point.
参考答案：
C
[单项选择题]
12、Whenarepacketsprocessedinaninboundaccesslist?
（）
A.Beforetheyareroutedtoanoutbound
interface.
B.Aftertheyareroutedforoutbound
traffic.
C.Aftertheyareroutedtoanoutboundinterfacewhile
queuing.
D.Beforeandaftertheyareroutedtoanoutbound
interface.
E.Dependsontheconfigurationoftheinterface
F.Noneoftheabove
参考答案：
A
[单项选择题]
13、WhichIPaddressandwildcardmaskwouldyouuseinyourACLtoblockallthehostsinthesubnet
192.168.16.43/28?
（）
A.192.168.16.32
0.0.0.16
B.192.168.16.43
0.0.0.212
C.192.168.16.0
0.0.0.15
D.192.168.16.32
0.0.0.15
E.192.168.16.0
0.0.0.31
F.192.168.16.16
0.0.0.31
参考答案：
D
[单项选择题]
14、TheTestkingnetworkisimplementingdialupservicesfortheirremote
employees.TestkingusesseveraldifferentLayer3protocolsonthe
network.Authenticationoftheusersconnectingtothenetworkisrequiredfor
security.Additionally,someemployeeswillbedialinglongdistanceandwillneedcallback
support.Whichprotocolisthebestchoicefortheseremoteaccessservices?
（）
A.802.1
B.Framerelay
C.HDLC
D.PPP
E.SLIP
F.PAP
参考答案：
D[单项选择题]
15、WhichoneofthefollowingparametersistheveryfirstthingthatneedstobeconfiguredaspartoftheIGRProutingprocess?
（）
A.Thewildcardmask
B.TheIPaddress
C.TheIPaddressmask
D.Themetricweights
E.TheAutonomousSystemnumber
参考答案：
E
[多项选择题]
16、Whichofthefollowingroutingprotocolsarelesslikelyproneroutingloopsandnetworkreachabilityproblemswhenusedindiscontiguousnetworks?
（）
A.IGRP
B.CDP
C.OSPF
D.RIPv1
E.RIPv2
F.EIGRP
参考答案：
C,E,F
[单项选择题]
17、OntheassumptionthateveryOSPFrouterinaparticularareaisconfiguredwiththereisnoloopbackinterfaceset?
（）
A.TheIPaddressofthefirstFastEthernet
interface.
B.TheIPaddressoftheconsolemanagement
interface.
C.ThehighestIPaddressamongitsactive
interfaces.
D.ThelowestIPaddressamongitsactive
interfaces.
E.TherewillbenorouterIDuntilaloopbackinterfaceis
configured.
参考答案：
C
[多项选择题]
18、OnwhatkindsofnetworksdoesOSPFelectabackupdesignatedrouter?
（）
A.Point-to-point
B.Pointtomultipoint
C.Broadcast
D.Non-broadcastmulti-access
参考答案：
C,D[多项选择题]
19、Whichofthecommandsbelowcanyouusetoconfigureadefaultroute?
（）
A.TK1（config）#iproute
0.0.0.0
0.0.0.0E0
B.TK1（config）#iproute
0.0.0.0
255.255.255.255S0
C.TK1（config-interface）#iproute
255.255.255.255
0.0.0.0
192.168.1.21
D.TK1（config）#iproute
0.0.0.0
0.0.0.0
192.168.1.21
E.TK1（config）#iproute
0.0.0.0
192.168.1.21
255.255.255.255
F.TK1#ipdefault-network
0.0.0.0
192.168.1.21
255.255.255.255
参考答案：
A,D
[单项选择题]
20、YouneedtosetthedefaultgatewayofoneofyourTestKing
switches.Whichcommandwillsetthedefaultgatewayto
192.168.12.1onaCiscoswitch?
（）
A.Switch（config）#ipdefault-network
192.168.12.1
B.Switch（config）#iproute-default
192.168.12.1
C.Switch（config）#ipdefault-gateway
192.168.12.1
D.Swicth（config）#iproute
192.168.12.1
0.0.0.0
参考答案：
C
[单项选择题]
21、YouarebringingupanewCiscoCatalystswitch,andwishtoconnectitviaatrunktoanotherswitchfromadifferentvendor,whichusestheIEEEstandardforthetrunking
method.Whensettingtheencapsulationtypeonthetrunk,whatshouldyouconfigureontheCiscoswitch?
（）
A.Switch（config）#switchporttrunkencapsulationisl
B.Switch（config）#switchporttrunkencapsulationietf
C.Switch（config-if）#switchporttrunkencapsulationisl
D.Switch（config-if）#switchporttrunkencapsulationietf
E.Switch（config-if）#switchporttrunkencapsulationdot1q
参考答案：
E更多内容请访问《睦霖题库》微信公众号
[多项选择题]
22、WhataresomeofthecharacteristicsofatypicalVLANarrangement?
（）
A.VLANslogicallydivideaswitchintomultiple,independentswitchesatLayer
2.
B.Trunklinkscancarrytrafficformultiple
VLANs.
C.VLANimplementationsignificantlyincreasestrafficduetoaddedtrunking
information.
D.AVLANcanspanmultiple
switches.
E.VLANstypicallyincreasethenumberofswitchesneeded
F.VLANstypicallydecreasethenumberofswitchesneeded
参考答案：
A,B,D
[单项选择题]
23、WhichVTPmodeshouldaCiscoswitchbesettoifthisswitchistoaddordeleteVLANstoamanagementdomain?
（）
A.Transparent
B.Server
C.Auto
D.Client
E.User
参考答案：
B
[多项选择题]
24、WhichofthefollowingarebenefitsofVLANs?
（）
A.Theyincreasethesizeofcollision
domains.
B.Theyallowlogicalgroupingofusersby
function.
C.Theycanenhancenetworksecurity,
D.Theincreasethesizeofbroadcastdomainswhiledecreasingthenumberofthebroadcast
domains.
E.Theincreasethenumberofbroadcastdomainswhiledecreasingthesizeofthebroadcast
domains.
F.Theysimplifyswitch
administration.
参考答案：
B,C,E
[单项选择题]
25、WhichtypeofcableshouldbeusedtomakeaconnectionbetweentheFa0/0portonarouterandtheFa0/0portswitch?
（）
A.Rollovercable
B.Consolecable
C.Crossovercable
D.Straight-throughcable
E.Serialcable
参考答案：
C[单项选择题]
26、AnetworkadministratorwantstocontrolwhichuserhostscanaccessthenetworkbasedontheirMAC
address.WhatwillpreventworkstationswithunauthorizedMACaddressesfromconnectingtothenetworkthroughaswitch?
（）
A.BPDU
B.Portsecurity
C.RSTP
D.STP
E.VTP
F.Blockingmode
参考答案：
B
[单项选择题]
27、Afterloggingintoarouter,youtypein"enable"
andthenenterthecorrectpasswordwhen
prompted.Whatisthecurrentrouterpromptsymbolatthispoint?
（）
A.>
B.#
C.?
D.*
E.Alloftheabove
F.Noneoftheabove
参考答案：
B
[单项选择题]
28、AfterworkingallnightandsuccessfullyconfiguringaCiscorouterfortheTestKingnetworkyousaveyourchangesonthestartupconfig,reboottherouter,andgooutfora
cigarette.Whenyoureturn,noneofyourchangesareactiveandtherouterbootstotheinitialconfigurationmode!
Whichofthechoicesbelowindicatesthesourceofyourproblem?
（）
A.HardwarefailureinNVRAMpreventstherouterfromloadingtheconfig
B.Startup-configinflashiscorruptandcannotbeanalyzed
C.Routerconfiguration-registersettobypassstartupconfiguration
D.Startup-configinNVRAMiscorruptandcannotbeanalyzed
E.Noneoftheabove
参考答案：
C[单项选择题]
29、Afterissuingthe"showversion"
升级会员 