CCNA(640802)真题精选.docx
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CCNA（640-802）真题精选
[单项选择题]
1、AdefaultFrameRelayWANisclassifiedaswhattypeofphysicalnetwork?
（）
A.point-to-point
B.broadcastmulti-access
C.nonbroadcastmulti-access
D.nonbroadcastmultipoint
E.broadcastpoint-to-multipoint
参考答案：
C
[多项选择题]
2、Whataretworeasonsthatanetworkadministratoruseaccesslists?
（Choose
two.）（）。
A.tocontrolvtyaccessintoarouter
B.tocontrolbroadcasttrafficthrougharouter
C.tofiltertrafficasitpassesthrougharouter
D.tofiltertrafficthatoriginatesfromtherouter
E.toreplacepasswordsasalineofdefenseagainstincursions
参考答案：
A,C
wouldsecurity
[多项选择题]
3、Asingle
802.11gaccesspointhasbeenconfiguredandinstalledinthecenterofasquare
office.Afewwirelessusersareexperiencingslowperformanceanddropswhilemostusersareoperatingatpeak
efficiency.Whatarethreelikelycausesofthisproblem?
（Choose
three.）（）
A.mismatchedTKIPencryption
B.nullSSID
C.cordlessphones
D.mismatchedSSID
E.metalfilecabinets
F.antennatypeordirection
参考答案：
C,E,F[单项选择题]
4、Thecommandframe-relaymapip
10.121.16.8102broadcastwasenteredonthe
router.Whichofthefollowingstatementsistrueconcerningthiscommand？
（）
A.Thiscommandshouldbeexecutedfromtheglobalconfiguration
mode.
B.TheIPaddress
10.121.16.8isthelocalrouterportusedtoforward
data.
C.102istheremoteDLCIthatwillreceivethe
information.
D.ThiscommandisrequiredforallFrameRelay
configurations.
E.Thebroadcastoptionallowspackets，suchasRIPupdates，tobeforwardedacrossthePVC
参考答案：
E
[单项选择题]
5、Whichtypeofattackispacketsthatarerequesting（）
A.denialofservice
B.bruteforce
C.reconnaissance
D.Trojanhorse
参考答案：
A
characterizedbyafloodofaTCPconnectiontoaserver？
[多项选择题]
6、WhichofthefollowingareassociatedwiththeapplicationlayeroftheOSImodel？
（
two.）
（）
A.ping
B.Telnet
C.FTP
D.TCP
E.IP
参考答案：
B,C
[单项选择题]
7、Forsecurityreasons,thenetworkadministratorneedstopreventpingsintothecorporatenetworksfromhostsoutsidethe
internetwork.Whichprotocolshouldbeblockedwithaccesscontrollists？
（）
A.IP
B.ICMPC.TCP
D.UDP
参考答案：
B
[多项选择题]
8、Whataretworecommendedwaysofprotectingnetworkdeviceconfigurationfilesfromoutsidenetworksecuritythreats?
（Choose
two.）
（）
A.AllowunrestrictedaccesstotheconsoleorVTY
ports.
B.Useafirewalltorestrictaccessfromtheoutsidetothenetwork
devices.
C.AlwaysuseTelnettoaccessthedevicecommandlinebecauseitsdataisautomatically
encrypted.
D.UseSSHoranotherencryptedandauthenticatedtransporttoaccessdevice
configurations.
E.Preventthelossofpasswordsbydisablingpassword
encryption.
参考答案：
B,D
[多项选择题]
9、Whataretwosecurityappliancesthatcanbeinstalledinanetwork?
（Choose
two.）
（）
A.ATM
B.IDS
C.IOS
D.IOX
E.IPS
F.SDM
参考答案：
B,E
[单项选择题]
10、Whichspreadspectrumtechnologydoesthe
802.11bstandarddefineforoperation?
（）
A.IR
B.DSSS
C.FHSS
D.DSSSandFHSS
E.IR,FHSS,andDSSS
参考答案：
B[单项选择题]
11、Anetworkinterfaceporthascollisiondetectionandcarriersensingenabledonasharedtwistedpair
network.Fromthisstatement,whatisknownaboutthenetworkinterfaceport?
（）
A.Thisisa10Mb/sswitch
port.
B.Thisisa100Mb/sswitch
port.
C.ThisisanEthernetportoperatingathalf
duplex.
D.ThisisanEthernetportoperatingatfull
duplex.
E.ThisisaportonanetworkinterfacecardinaPC
参考答案：
C
[多项选择题]
12、AcompanyisinstallingIP
phones.Thephonesandofficecomputersconnecttothesame
device.Toensuremaximumthroughputforthephonedata,thecompanyneedstomakesurethatthephonetrafficisonadifferentnetworkfromthatoftheofficecomputerdata
traffic.Whatisthebestnetworkdevicetowhichtodirectlyconnectthephonesandcomputers,andwhattechnologyshouldbeimplementedonthisdevice?
（Choose
two.）
（）
A.hub
B.router
C.switch
D.STP
E.subinterfaces
F.VLAN
参考答案：
C,F
[单项选择题]
13、Whichroutingprotocolbydefaultusesbandwidthanddelayasmetrics?
（）
A.RIP
B.BGP
C.OSPF
D.EIGRP
参考答案：
D
[单项选择题]
14、IntheimplementationofVLSMtechniquesonanetworkusingasingleClassCIPaddress,whichsubnetmaskisthemostefficientforpoint-to-pointseriallinks?
（）
A.255.255.255.0
B.255.255.255.240
C.255.255.255.248
D.255.255.255.252
E.255.255.255.254
参考答案：
D
[多项选择题]
15、WhichtwovaluesareusedbySpanningTreeProtocoltoelectarootbridge?
（Choose
two.）
（）。
A.amountofRAM
B.bridgepriority
C.IOSversion
D.IPaddress
E.MACaddress
F.speedofthelinks
参考答案：
B,E
[单项选择题]
16、Whiletroubleshootinganetworkconnectivityproblem,atechnicianobservessteadylinklightsonboththeworkstationNICandtheswitchporttowhichtheworkstationis
connected.However,whenthepingcommandisissuedfromtheworkstation,theoutputmessage"Requesttimed
out."
is
displayed.AtwhichlayeroftheOSImodeldoestheproblemmostlikelyexist?
（）
A.thesessionlayer
B.theprotocollayer
C.thedatalinklayer
D.theaccesslayer
E.thenetworklayer
F.theapplicationlayer
参考答案：
E
[单项选择题]
17、InordertoallowtheestablishmentofaTelnetsessionwitharouter,whichsetofcommandsmustbeconfigured?
（）
A.A
B.B
C.C
D.D
E.E
F.F
参考答案：
F
[单项选择题]
18、Onpoint-to-pointnetworks,OSPFhellopacketsareaddressedtowhichaddress?
（）
A.127.0.0.1
B.172.16.0.1
C.192.168.0.5
D.223.0.0.1
E.224.0.0.5
F.254.255.255.255
参考答案：
E
[单项选择题]
19、Whiletroubleshootingaconnectivityproblem,anetworkadministratornoticesthataportstatusLEDonaCiscoCatalystseriesswitchisalternatinggreenand
amber.Whichconditioncouldthisindicate?
（）
A.Theportisexperiencing
errors.
B.Theportisadministratively
disabled.
C.Theportisblockedbyspanning
tree.
D.Theporthasanactivelinkwithnormal
参考答案：
A
traffic
activity.
[单项选择题]
20、WhatisthemaximumdataratespecifiedforIEEE
802.11bWLANs?
（）
A.10Mbps
B.11Mbps
C.54Mbps
D.100Mbps
参考答案：
B
[多项选择题]
21、WhichofthefollowingdescribetheprocessidentifierthatisusedtorunOSPFonarouter?
（Choose
two.）
（）
A.Itislocally
significant.
B.Itisglobally
significant.
C.ItisneededtoidentifyauniqueinstanceofanOSPF
database.
D.ItisanoptionalparameterrequiredonlyifmultipleOSPFprocessesarerunningonthe
router.
E.AllroutersinthesameOSPFareamusthavethesameprocessIDiftheyaretoexchangerouting
information.
参考答案：
A,C更多内容请访问《睦霖题库》微信公众号
[多项选择题]
22、Whichtwostatementsaretrueaboutthecommandiproute
172.16.3.0
255.255.255.0
192.168.2.4?
（Choose
two.）
（）
A.Itestablishesastaticroutetothe
172.16.3.0
network.
B.Itestablishesastaticroutetothe
192.168.2.0
network.
C.Itconfigurestheroutertosendanytrafficforanunknowndestinationtothe
172.16.3.0
network.
D.Itconfigurestheroutertosendanytrafficforanunknowndestinationouttheinterfacewiththeaddress
192.168.2.4.
E.Itusesthedefaultadministrative
distance.F.Itisaroutethatwouldbeusedlastifotherroutestothesamedestination
exist.
参考答案：
A,E
[多项选择题]
23、WhichthreestatementsarecorrectaboutRIP（Choose
three.）
（）
A.Ithasthesamemaximumhopcountasversion
B.Itusesbroadcastsforitsrouting
updates.
C.Itisaclasslessrouting
protocol.
D.Ithasalowerdefaultadministrativedistanceversion
1.
E.Itsupports
authentication.
F.Itdoesnotsendthesubnetmaskin
updates.
参考答案：
A,C,E
version2?
1.
thanRIP
[单项选择题]
24、Whatshouldbepartofacomprehensivenetworksecurityplan?
（）
A.Allowuserstodeveloptheirownapproachtonetwork
security.
B.Physicallysecurenetworkequipmentfrompotentialaccessbyunauthorized
individuals.
C.Encourageuserstousepersonalinformationintheirpasswordstominimizethelikelihoodofpasswords
beingforgotten.
D.Delaydeploymentofsoftwarepatchesandupdatesuntiltheireffectonend-userequipmentiswellknownandwidely
reported.
E.Minimizenetworkoverheadbydeactivatingautomaticantivirusclient
updates.
参考答案：
B
[单项选择题]
25、HowshouldarouterthatisbeingusedinaFrameRelaynetworkbeconfiguredtoavoidsplithorizonissuesfrompreventingroutingupdates?
（）
A.Configureaseparatesub-interfaceforeachPVCwithauniqueDLCIandsubnetassignedtothesub-
interface.
B.ConfigureeachFrameRelaycircuitasapoint-to-pointlinetosupportmulticastandbroadcast
traffic.C.Configuremanysub-interfacesonthesame
subnet.
D.Configureasinglesub-interfacetoestablishmultiplePVCconnectionstomultipleremoterouter
interfaces.
参考答案：
A
[多项选择题]
26、WhichtwostatementsbestdescribethewirelesssecuritystandardthatisdefinedbyWPA？
（Choose
two.）
（）
A.Itspecifiesuseofastaticencryptionkeythatmustbechangedfrequentlytoenhance
security.
B.Itrequiresuseofanopenauthentication
method.
C.Itspecifiestheuseofdynamicencryptionkeysthatchangeeachtimeaclientestablishesa
connection.
D.Itrequiresthatallaccesspointsandwirelessdevicesusethesameencryption
key.
E.ItincludesauthenticationbyPSK
参考答案：
C,E
[多项选择题]
27、WhatcananetworkadministratorutilizebyusingPPPLayer2encapsula
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