网络学院Q1a.docx
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网络学院Q1a
1
窗体顶端
WhichofthefollowingarerequiredwhenaddinganetworktotheOSPFroutingprocessconfiguration?
（Choosethree.）
networkaddress
loopbackaddress
autonomoussystemnumber
subnetmask
wildcardmask
areaID
窗体底端
Observable
Description
MaxValue
1
correctnessofresponse
Option1,Option5,andOption6arecorrect.
1pointforeachcorrectoption.
0pointsifmoreoptionsareselectedthanrequired.
3
Thisitemreferencescontentfromthefollowingareas:
CCNAExploration:
RoutingProtocolsandConcepts
∙11.2.3ThenetworkCommand
2
窗体顶端
Whichofthefollowingareprimaryfunctionsofarouter?
（Choosetwo.）
packetswitching
microsegmentation
domainnameresolution
pathselection
flowcontrol
窗体底端
Observable
Description
MaxValue
1
correctnessofresponse
Option1andOption4arecorrect.
1pointforeachcorrectoption.
0pointsifmoreoptionsareselectedthanrequired.
2
Thisitemreferencescontentfromthefollowingareas:
CCNAExploration:
RoutingProtocolsandConcepts
∙1.1.1RoutersareComputers
3
窗体顶端
Refertotheroutingtableshownintheexhibit.Whatisthemeaningofthehighlightedvalue192?
ItisthevalueassignedbytheDijkstraalgorithmthatdesignatesthenumberofhopsinthenetwork.
ItisthevalueusedbytheDUALalgorithmtodeterminethebandwidthforthelink.
Itisthemetric,whichiscost.
Itistheadministrativedistance.
窗体底端
Observable
Description
MaxValue
1
correctnessofresponse
2pointsforOption3
0pointsforanyotheroption
2
Thisitemreferencescontentfromthefollowingareas:
CCNAExploration:
RoutingProtocolsandConcepts
∙3.5.1IdentifyingElementsoftheRoutingTable
4
窗体顶端
Whichthreestatementsaretrueregardingtheencapsulationandde-encapsulationofpacketswhentravelingthrougharouter?
（Choosethree.）
TheroutermodifiestheTTLfield,decrementingitbyone.
TherouterchangesthesourceIPtotheIPoftheexitinterface.
TheroutermaintainsthesamesourceanddestinationIP.
Therouterchangesthesourcephysicaladdresstothephysicaladdressoftheexitinterface.
TherouterchangesthedestinationIPtotheIPoftheexitinterface.
Theroutersendsthepacketoutallotherinterfaces,besidestheoneitenteredtherouteron.
窗体底端
Observable
Description
MaxValue
1
correctnessofresponse
Option1,Option3,andOption4arecorrect.
1pointforeachcorrectoption.
0pointsifmoreoptionsareselectedthanrequired.
3
Thisitemreferencescontentfromthefollowingareas:
CCNAExploration:
RoutingProtocolsandConcepts
∙1.4.5SwitchingFunction
5
窗体顶端
Refertotheexhibit.Whichpathwilltrafficfromthe172.16.1.0/24networktaketogettothe10.0.0.0/24network?
ADC
ABC
ItwillloadbalancethetrafficbetweenADCandABC
ItwillsendthetrafficviaABC,andwilluseADCasabackuppathonlywhenABCfails.
窗体底端
Observable
Description
MaxValue
1
correctnessofresponse
2pointsforOption3
0pointsforanyotheroption
2
Thisitemreferencescontentfromthefollowingareas:
CCNAExploration:
RoutingProtocolsandConcepts
∙3.3.3LoadBalancing
6
窗体顶端
WhatisthepurposeoftheTTLfieldwithinanIPpacketheader?
clearsanunreachableroutefromtheroutingtableaftertheinvalidtimerexpires
preventsregularupdatemessagesfrominappropriatelyreinstatingaroutethatmayhavegonebad
removesanunreachableroutefromtheroutingtableaftertheflushtimerexpires
limitstheperiodoftimeornumberofhopsapacketcantraversethroughthenetworkbeforeitshouldbediscarded
usedtomarktherouteasunreachableinaroutingupdatethatissenttootherrouters
窗体底端
Observable
Description
MaxValue
1
correctnessofresponse
2pointsforOption4
0pointsforanyotheroption
2
Thisitemreferencescontentfromthefollowingareas:
CCNAExploration:
RoutingProtocolsandConcepts
∙4.4.7IPandTTL
7
窗体顶端
Refertotheexhibit.Howmanyroutesarebothlevel1andqualifyforuseasanultimateroute?
1
2
3
4
5
6
窗体底端
Observable
Description
MaxValue
1
correctnessofresponse
2pointsforOption2
0pointsforanyotheroption
2
Thisitemreferencescontentfromthefollowingareas:
CCNAExploration:
RoutingProtocolsandConcepts
∙8.1.3Level1Routes
8
窗体顶端
Refertotheexhibit.Costforeachpathareshown.IfallroutersareconfiguredtouseOSPF,whatwouldbethepathofapacketsentfromRouterCtoRouterDifRouterAwasdown?
C-B-E-D
C-B-A-D
C-F-E-D
C-F-B-A-D
C-F-E-A-D
窗体底端
Observable
Description
MaxValue
1
correctnessofresponse
2pointsforOption3
0pointsforanyotheroption
2
Thisitemreferencescontentfromthefollowingareas:
CCNAExploration:
RoutingProtocolsandConcepts
∙10.1.2IntroductiontotheSPFAlgorithm
9
窗体顶端
Refertotheexhibit.Routers1and2aredirectlyconnectedoveraseriallink.Pingsarefailingbetweenthetworouters.Whatchangebytheadministratorwillcorrecttheproblem?
SettheencapsulationonbothrouterstoPPP.
DecreasethebandwidthonSerial0/1/0onrouter2to1544.
Changethecablethatconnectstherouterstoacrossovercable.
ChangetheIPaddressonSerial0/1/0onrouter2to192.168.0.1/30.
窗体底端
Observable
Description
MaxValue
1
correctnessofresponse
2pointsforOption4
0pointsforanyotheroption
2
Thisitemreferencescontentfromthefollowingareas:
CCNAExploration:
RoutingProtocolsandConcepts
∙1.2.2BasicRouterConfiguration
10
窗体顶端
Refertotheexhibit.AnetworkadministratoristryingtodeterminewhyrouterJAXhasnoOSPFroutesinitsroutingtable.AllroutersareconfiguredforOSPFarea0.FromtheJAXrouter,theadministratorisabletopingitsconnectedinterfacesandtheFa0/1interfaceoftheORLrouterbutnootherrouterinterfaces.Whatisalogicalstepthatthenetworkadministratorshouldtaketotroubleshoottheproblem?
Reboottherouters.
ChangetheOSPFprocessIDonalloftheroutersto0.
ChecktoseeifthecableisloosebetweenORLandJAX.
ChecktoseeifCDPpacketsarepassingbetweentherouters.
Useshowanddebugcommandstodetermineifhellosarepropagating.
窗体底端
Observable
Description
MaxValue
1
correctnessofresponse
2pointsforOption5
0pointsforanyotheroption
2
Thisitemreferencescontentfromthefollowingareas:
CCNAExploration:
RoutingProtocolsandConcepts
∙10.1.6BuildingtheLink-StatePacket
11
窗体顶端
Refertotheexhibit.WhichsummarizationshouldR1usetoadvertiseitsnetworkstoR2?
192.168.1.0/24
192.168.0.0/24
192.168.0.0/22
192.168.1.0/22
窗体底端
Observable
Description
MaxValue
1
correctnessofresponse
2pointsforOption3
0pointsforanyotheroption
2
Thisitemreferencescontentfromthefollowingareas:
CCNAExploration:
RoutingProtocolsandConcepts
∙6.3.1RouteSummarization
12
窗体顶端
Arouterbootsandenterssetupmode.Whatisthereasonforthis?
TheIOSimageiscorrupt.
CiscoIOSismissingfromflashmemory.
TheconfigurationfileismissingfromNVRAM.
ThePOSTprocesshasdetectedhardwarefailure.
窗体底端
Observable
Description
MaxValue
1
correctnessofresponse
2pointsforOption3
0pointsforanyotheroption
2
Thisitemreferencescontentfromthefollowingareas:
CCNAExploration:
RoutingProtocolsandConcepts
∙1.1.4RouterBoot-upProcess
13
窗体顶端
Refertotheexhibit.R1isconfiguredproperlyforasingleareaOSPF,andR2hasbeenrecentlyinstalledinthenetwork.WhichsetofcommandsisrequiredtoconfigureasingleareaOSPFforthenetworksthatareconnectedtoR2?
R2（config）#routerospf1
R2（config-router）#network192.168.2.00.0.0.255area0
R2（config-router）#network10.1.1.00.0.0.3area0
R2（config）#routerospf1
R2（config-router）#network192.168.2.00.0.0.255area0
R2（config）#routerospf2
R2（config-router）#network10.1.1.00.0.0.3area0
R2（config）#routerospf1
R2（config-router）#network192.168.2.00.0.0.255area0
R2（config-router）#network10.1.1.00.0.0.3area1
R2（config）#routerospf1
R2（config-router）#network192.168.2.00.0.0.255area0
R2（config-router）#network10.0.0.00.0.0.3area1
窗体底端
Observable
Description
MaxValue
1
correctnessofresponse
2pointsforOption1
0pointsforanyotheroption
2
Thisitemreferencescontentfromthefollowingareas:
CCNAExploration:
RoutingProtocolsandConcepts
∙11.2.3ThenetworkCommand
14
窗体顶端
Refertotheexhibit.RoutersR1andR2aredirectlyconnectedviatheirserialinterfacesandarebothrunningtheEIGRProutingprotocol.R1andR2canpingthedirectlyconnectedserialinterfaceoftheirneighbor,buttheycannotformanEIGRPneighboradjacency.
Whatactionshouldbetakentosolvethisproblem?
Enabletheserialinterfacesofbothrouters.
ConfigureEIGRPtosendperiodicupdates.
Configurethesamehellointervalbetweentherouters.
ConfigurebothrouterswiththesameEIGRPprocessID.
窗体底端
Observable
Description
MaxValue
1
correctnessofresponse
2pointsforOption4
0pointsforanyo
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