思科网院考试题库.docx
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思科网院考试题库.docx
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思科网院考试题库
思科网院考试题库
CCNA1-Module2
CCNA1-Module2
1
WhichtwolayersoftheOSImodelhavethesamefunctionsastheTCP/IPmodelNetworkAccessLayer?
(Choosetwo.)
Network
Transport
Physical**
DataLink**
Session
2
Whatisaprimaryfunctionofthetrailerinformationaddedbythedatalinklayerencapsulation?
supportserrordetection**
ensuresorderedarrivalofdata
providesdeliverytocorrectdestination
identifiesthedevicesonthelocalnetwork
assistsintermediarydeviceswithprocessingandpathselection
3
Duringtheencapsulationprocess,whatoccursatthedatalinklayer?
Noaddressisadded.
Thelogicaladdressisadded.
Thephysicaladdressisadded.**
Theprocessportnumberisadded.
4
Whatdeviceisconsideredanintermediarydevice?
fileserver
IPphone
laptop
printer
switch**
5
Whichlayerencapsulatesthesegmentintopackets?
physical
datalink**
network
transport
6
Whichstatementscorrectlyidentifytheroleofintermediarydevicesinthenetwork?
(Choosethree.)
determinepathwaysfordata**
initiatedatacommunications
retimeandretransmitdatasignals**
originatetheflowofdata
managedataflows**
finalterminationpointfordataflow
7
Whatcanbeidentifiedbyexaminingthenetworklayerheader?
thedestinationdeviceonthelocalmedia
thepathtousetoreachthedestinationhost**
thebitsthatwillbetransferredoverthemedia
thesourceapplicationorprocesscreatingthedata
8
WhatistheproperorderofthelayersoftheOSImodelfromthehighestlayertothelowestlayer?
physical,network,application,datalink,presentation,session,transport
application,physical,session,transport,network,datalink,presentation
application,presentation,physical,session,datalink,transport,network
application,presentation,session,transport,network,datalink,physical**
presentation,datalink,session,transport,network,physical,application
9
Refertotheexhibit.Whichthreelabelscorrectlyidentifythenetworktypesforthenetworksegmentsthatareshown?
(Choosethree.)
NetworkA--WAN
NetworkB--WAN**
NetworkC--LAN**
NetworkB--MAN
NetworkC--WAN
NetworkA--LAN**
10
Whatarethekeyfunctionsofencapsulation?
(Choosethree.)
allowsmodificationoftheoriginaldatabeforetransmission
identifiespiecesofdataaspartofthesamecommunication**
enablesconsistentnetworkpathsforcommunication
ensuresthatdatapiecescanbedirectedtothecorrectreceivingenddevice**
enablesthereassemblyofcompletemessages**
tracksdelaybetweenenddevices
11
Refertotheexhibit.Whichnetworkingtermdescribesthedatainterleavingprocessrepresentedinthegraphic?
piping
PDU
streaming
multiplexing
**encapsulation
12
WhatisaPDU?
corruptionofaframeduringtransmission
datareassembledatthedestination
retransmittedpacketsduetolostcommunication
**alayerspecificencapsulation
13
Refertotheexhibit."CellA"atIPaddresshasestablishedanIPsessionwith"IPPhone1"atIPaddressBaseduponthegraphic,whichdevicetypebestdescribesthefunctionofwirelessdevice"CellA?
"
thedestinationdevice
**anenddevice
anintermediatedevice
amediadevice
14
Refertotheexhibit.Whichsetofdevicescontainsonlyenddevices?
A,C,D
B,E,G,H
C,D,G,H,I,J
D,E,F,H,I,J
**E,F,H,I,J
15
Refertotheexhibit.Whichtermcorrectlyidentifiesthedevicetypethatisincludedinthegreenarea?
source
end
transfer
**intermediary
16
WhichthreestatementsbestdescribeaLocalAreaNetwork(LAN)?
(Choosethree.)
**ALANisusuallyinasinglegeographicalarea.
**Thenetworkisadministeredbyasingleorganization.
TheconnectionbetweensegmentsintheLANisusuallythroughaleasedconnection.
Thesecurityandaccesscontrolofthenetworkarecontrolledbyaserviceprovider.
**ALANprovidesnetworkservicesandaccesstoapplicationsforuserswithinacommonorganization.
EachendofthenetworkisgenerallyconnectedtoaTelecommunicationServiceProvider(TSP).
17
Refertotheexhibit.Whattypeofnetworkisshown?
WAN
MAN
**LAN
WLAN
18
WhatisthepurposeoftheTCP/IPNetworkAccesslayer?
pathdeterminationandpacketswitching
**datarepresentation,encoding,andcontrol
reliability,flowcontrol,anderrordetection
detailingthecomponentsthatmakeupthephysicallinkandhowtoaccessit
thedivisionofsegmentsintopackets
19
Whichcharacteristiccorrectlyreferstoenddevicesinanetwork?
managedataflows
originatedataflow
**retimeandretransmitdatasignals
determinepathwaysfordata
20
WhatistheprimarypurposeofLayer4portassignment?
toidentifydevicesonthelocalmedia
toidentifythehopsbetweensourceanddestination
toidentifytotheintermediarydevicesthebestpaththroughthenetwork
toidentifythesourceanddestinationenddevicesthatarecommunicating
**toidentifytheprocessesorservicesthatarecommunicatingwithintheenddevices
21
Selectthestatementsthatarecorrectconcerningnetworkprotocols.(Choosethree.)
**definethestructureoflayerspecificPDU's
dictatehowtoaccomplishlayerfunctions
**outlinethefunctionsnecessaryforcommunicationsbetweenlayers
limithardwarecompatibility
**requirelayerdependentencapsulations
eliminatestandardizationamongvendors
CCNA1-Module3
CCNA1-Module3
1.WhatisthepurposeofresourcerecordsinDNS?
usedbytheservertoresolvenames
2.Whataretwoformsofapplicationlayersoftware?
applications
syntax
3.Whatapplicationlayerprotocoliscommonlyusedtosupportforfiletransfersbetweenaclientandaserver?
FTP
4.Whataretwocharacteristicsofpeer-to-peernetworks?
decentralizedresources
resourcesharingwithoutadedicatedserver
5.WhichlayeroftheOSImodelsuppliesservicesthatallowusertointerfacewiththenetwork?
application
6.Whatarethreepropertiesofpeer-to-peerapplications?
actsasbothaclientandserverwithinthesamecommunication
hybridmodeincludesacentralizeddirectoryoffiles
doesnotrequirespecializedsoftware
7.WhatistheroleoftheOSIapplicationlayer?
providestheinterfacebetweentheapplicationsoneitherendofthenetwork
8.WhatthreeprotocolsoperateattheApplicationlayeroftheOSImodel?
DNS,SMTP,POP
9.Whichemailcomponentsareusedtoforwardmailbetweenservers?
MDA,MTA
10.Whichtwoprotocolsareusedtocontrolthetransferofwebresourcesfromawebservertoaclientbrowser?
HTTPS
HTTP
11.WhichstatementsarecorrectconcerningtheroleoftheMTAinhandlingemail?
receivesemailfromtheclient'sMUA
passesemailtotheMDAforfinaldelivery
usesSMTPtorouteemailbetweenservers
12.AscomparedtoSSH,whatistheprimarydisadvantageoftelnet?
doesnotsupportencryption
13.Whichapplicationlayerprotocolscorrectlymatchacorrespondingfunction?
DNSdynamicallyallocatesIPaddressestohosts
Telnetprovidesavirtualconnectionforremoteaccess
14.WhatistheautomatedservicethatmatchesresourcenameswiththerequiredIPaddress?
DNS
15.Refertotheexhibit.Whatisthedestinationportforthecommunicationthatisrepresentedonline5?
80
16.Whataretwocharacteristicsofclientsindatanetworks?
initiatedataexchanges
mayuploaddatatoservers
17.WhatapplicationlayerprotocoldescribestheservicesthatareusedforfilesharinginMicrosoftnetworks?
SMB
18.Anetworkadministratorisdesigninganetworkforanewbranchofficeoftwenty-fiveusers.Whataretheadvantagesofusingaclient-servermodel?
centralizedadministration
securityiseasiertoenforce
19.Asmallhomenetworkhasbeeninstalledtointerconnectthreecomputerstogetherforgamingandfilesharing.Whattwopropertiesrepresentthisnetworktype?
Useraccountsarecentralized.
Securityisdifficulttoenforce.
20.Howdoestheapplicationlayeronaserverusuallyprocessmultipleclientrequestforservices?
usessupportfromlowerlayerfunctionstodistinguishbetweenconnectionstotheservice
CCNA1-Module4
CCNA1-Module4
1
Refertotheexhibit.Whattwopiecesofinformationcanbedeterminedfromtheoutputthatisshown?
(Choosetwo.)
Thelocalhostisusingwell-knownportnumberstoidentifythesourceports.
**Aterminationrequesthasbeensentto
CommunicationwithisusingHTTPSecure.
**ThelocalcomputerisacceptingHTTPrequests.
isperformingthethree-wayhandshakewith
2
Afterawebbrowsermakesarequesttoawebserverthatislisteningtothestandardport,whatwillbethesourceportnumberintheTCPheaderoftheresponsefromtheserver?
13
53
**80
1024
1728
3
WhichinformationisfoundinboththeTCPandUDPheaderinformation?
sequencing
flowcontrol
**acknowledgments
sourceanddestination
4
WhichisanimportantcharacteristicofUDP?
acknowledgementofdatadelivery
**minimaldelaysindatadelivery
highreliabilityofdatadelivery
sameorderdatadelivery
5
Refertotheexhibit.HostAisusingFTPtodownloadalargefilefromServer1.Duringthedownloadprocess,Server1doesnotreceiveanacknowledgmentfromHostAforseveralbytesoftransferreddata.WhatactionwillServer1takeasaresult?
createaLayer1jamsignal
**reachatimeoutandresendthedatathatneedstobeacknowledged
sendaRESETbittothehost
changethewindowsizeintheLayer4header
6
Refertotheexhibit.Inline7ofthisWiresharkcapture,whatTCPoperationisbeingperformed?
**sessionestablishment
segmentretransmit
datatransfer
sessiondisconnect
7
Refertotheexhibit.The
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