ccna 2chapter11.docx
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ccna 2chapter11.docx
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ccna2chapter11
AssessmentItem:
Refertotheexhibit.Whatmustbereceivedbetweenneighborstopreventthedeadtimethatisshownintheexhibitfromreachingzero?
anytrafficthroughtherouterinterfaces
routingdatabaseupdates
hellopackets
BPDUpackets
Reset
ScoringRulefor:
correctnessofresponse
2pointsforOption3
AssessmentItem:
Refertotheexhibit.TheroutersintheexhibitareusingdefaultOSPFconfigurationsettingstoadvertiseallattachednetworks.Ifalloftheroutersstartatthesametime,whatwillbetheresultoftheDRandBDRelectionsforthissingleareaOSPFnetwork?
(Choosethree.)
HQwillbeDRfor10.4.0.0/16.
RouterAwillbeDRfor10.4.0.0/16.
HQwillbeBDRfor10.4.0.0/16.
RouterAwillbeDRfor10.5.0.0/16.
RemotewillbeDRfor10.5.0.0/16.
RemotewillbeBDRfor10.5.0.0/16.
Reset
ScoringRulefor:
correctnessofresponse
Option2,Option3,andOption5arecorrect.
AssessmentItem:
WhichtwostatementsdescribetheuseofOSPFDR/BDRelections?
(Choosetwo.)
Electionsarealwaysoptional.
ElectionsarerequiredinallWANnetworks.
Electionsarerequiredinpoint-to-pointnetworks.
Electionsarerequiredinbroadcastmultiaccessnetworks.
ElectionsaresometimesrequiredinNBMAnetworks.
Reset
ScoringRulefor:
correctnessofresponse
Option4andOption5arecorrect.
AssessmentItem:
Refertotheexhibit.RouterA,RouterB,andRouterCinthediagramarerunningOSPFontheirEthernetinterfaces.RouterDwasjustaddedtothenetwork.Routersareconfiguredwiththeloopbackinterfaces(Lo0)thatareshownintheexhibit.WhathappenstotheOSPFDR/BDRafterRouterDisaddedtothenetwork?
RouterBtakesoverasDRandRouterDbecomestheBDR.
RouterDbecomestheBDRandRouterAremainstheDR.
RouterDbecomestheDRandRouterAbecomestheBDR.
RouterCactsastheDRuntiltheelectionprocessiscomplete.
RouterDbecomestheDRandRouterBremainstheBDR.
ThereisnochangeintheDRorBDRuntileithercurrentDRorBDRgoesdown.
Reset
ScoringRulefor:
correctnessofresponse
2pointsforOption6
AssessmentItem:
Refertotheexhibit.WhichcommandsequenceonRouterBwillredistributeagatewayoflastresorttotheotherroutersinOSPFarea0?
RouterB(config)#routerospf10
RouterB(config-router)#gateway-of-last-resort172.16.6.6
RouterB(config)#iproute0.0.0.00.0.0.0serial0/0/0
RouterB(config)#iproute0.0.0.00.0.0.0172.16.6.6
RouterB(config)#routerospf10
RouterB(config-router)#default-informationoriginate
RouterB(config)#routerospf10
RouterB(config-router)#default-network172.16.6.60.0.0.3area0
RouterB(config)#iproute0.0.0.00.0.0.0172.16.6.6
RouterB(config)#ipdefault-route0.0.0.00.0.0.0172.16.6.6
RouterB(config)#routerospf10
RouterB(config-router)#redistributeipdefault-route
Reset
ScoringRulefor:
correctnessofresponse
2pointsforOption3
AssessmentItem:
Refertotheexhibit.Router1andRouter2arerunningOSPF.Theshowipospfneighborcommandrevealsnoneighbors.Whatisapossiblecause?
OSPFautonomoussystemIDsdonotmatch.
OSPFprocessIDsdonotmatch.
OSPFnetworktypesareidentical.
OSPFhelloordeadtimersdonotmatch.
Reset
ScoringRulefor:
correctnessofresponse
2pointsforOption4
AssessmentItem:
Refertotheexhibit.AssumingthattheroutershavedefaultinterfaceOSPFprioritiesandnoconfiguredloopbackinterfaces,whattworoleswillrouterBplayoneachnetworksegment?
(Choosetwo.)
DRfornetwork192.168.1.200
BDRfornetwork192.168.1.200
DROTHERon192.168.1.200
DRfornetwork192.168.1.204
BDRfornetwork192.168.1.204
DROTHERonnetwork192.168.1.204
Reset
ScoringRulefor:
correctnessofresponse
Option1andOption5arecorrect.
AssessmentItem:
Refertotheexhibit.WhenOSPFisoperationalintheexhibitednetwork,whatneighborrelationshipisdevelopedbetweenRouter1andRouter2?
AFULLadjacencyisformed.
A2WAYadjacencyisformed.
Router2willbecometheDRandRouter1willbecometheBDR.
BothrouterswillbecomeDROTHERS.
Reset
ScoringRulefor:
correctnessofresponse
2pointsforOption1
AssessmentItem:
Refertotheexhibit.ThenetworkadministratorwantstosettherouterIDofRouter1to192.168.100.1.Whatstepscantheadministratortaketoaccomplishthis?
shutdowntheloopbackinterface
usetheOSPFrouter-id192.168.100.1command
usetheclearipospfprocesscommand
nothing,therouter-idofRouter1isalready192.168.100.1
Reset
ScoringRulefor:
correctnessofresponse
2pointsforOption4
AssessmentItem:
WhatrangeofnetworkswillbeadvertisedintheOSPFupdatesbythecommandRouter1(config-router)#network192.168.0.00.0.15.255area100?
192.168.0.0/24through192.168.0.15/24
192.168.0.0/24through192.168.15.0/24
192.168.15.0/24through192.168.31.0/24
192.168.15.0/24through192.168.255.0/24
192.168.16.0/24through192.168.255.0/24
Reset
ScoringRulefor:
correctnessofresponse
2pointsforOption2
AssessmentItem:
Refertotheexhibit.AllroutersarerunningOSPF.WhatcostwouldJAXputinitsroutingtableforthe10.0.0.0/24network?
2
156
1564
1785
1787
Reset
ScoringRulefor:
correctnessofresponse
2pointsforOption5
AssessmentItem:
Refertotheexhibit.RoutersA,B,C,andDareallrunningOSPFwithdefaultrouterIDsandOSPFinterfacepriorities.Loopbackinterfacesarenotconfiguredandallinterfacesareoperational.RouterDistheDRandrouterCistheBDR.
WhathappensimmediatelyafterthefollowingcommandsareenteredonrouterA?
A(config)#interfacefa0/0
A(config-if)#ipospfpriority255
AwillbecometheDR.DwillbecometheBDR.
AwillbecometheDR.CwillremaintheBDR.
DwillremaintheDR.AwillbecometheBDR.
DwillremaintheDR.CwillremaintheBDR.
Reset
ScoringRulefor:
correctnessofresponse
2pointsforOption4
AssessmentItem:
WhatisthedefaultadministrativedistanceforOSPF?
90
100
110
115
120
Reset
ScoringRulefor:
correctnessofresponse
2pointsforOption3
AssessmentItem:
Refertotheexhibit.HowmanyOSPFadjacenciesmustbeformedtobuildthecompletetopologyifaDRorBDRwerenotelectedinthisOSPFnetwork?
4
5
6
7
10
Reset
ScoringRulefor:
correctnessofresponse
2pointsforOption3
AssessmentItem:
Refertotheexhibit.Whatconfigurationstatementswouldgivetheresultsthatareshownintheoutputoftheshowipprotocolscommand?
B(config)#intfa0/0
B(config-if)#router-id192.168.1.5
B(config)#intlo0
B(config-if)#ipaddress192.168.1.5
B(config)#routerospf1
B(config-router)#router-id192.168.1.5
B(config)#routerospf1
B(config-router)#ipaddress192.168.1.5
Reset
ScoringRulefor:
correctnessofresponse
2pointsforOption3
AssessmentItem:
Refertotheexhibit.Allroutershavebeenconfiguredwiththeinterfaceprioritiesthatareshown.Allrouterswererestartedsimultaneously.TheresultsoftheDR/BDRelectionareshown.Whatcanbeconcludedaboutthisnetwork?
RouterCcannotwinaDRelectionunderanycircumstances.
Ifthelinkforinterface192.168.1.4goesdown,routerBwillbecomethenewDR.
ThehighestrouterIDwasmostlikelydeterminedviaanOSPFrouter-idstatementorstatements.
IfanewrouterisaddedwithahigherrouterIDthanrouterD,itwillbecometheDR.
Reset
ScoringRulefor:
correctnessofresponse
2pointsforOption3
AssessmentItem:
Refertotheexhibit.Whatdoesthe"2"standforintherouterospf2statement?
Thenumber2istheautonomoussystemnumber.
Thenumber2indicatesthenumberofnetworksadvertisedbyOSPF.
Thenumber2identifiesthisparticularinstanceofOSPFonthisrouter.
Thenumber2indicatesthepriorityoftheOSPFprocessonthisrouter.
ResetViewLearnerResponse
ScoringRulefor:
correctnessofresponse
2pointsforOption3
AssessmentItem:
Refertotheexhibit.WhichnetworkcommandorsetofcommandswillcauseOSPFtobeenabledtosendandreceivepacketsforanyR1interfaceintheexhibitedsubnets?
R1(config-router)#network10.0.0.00.0.0.0area0
R1(config-router)#network0.0.0.0255.255.255.255area0
R1(config-router)#network10.1.0.00.0.0.255area0
R1(config-router)#network172.16.1.00.0.0.3area0
R1(config-router)#network10.0.0.00.0.255.255area0
R1(config-router)#network172.16.0.00.255.255.255area0
ResetViewLearnerResponse
ScoringRulefor:
correctnessofresponse
2pointsforOption2
AssessmentItem:
Refertotheexhibit.RouterAiscorrectlyconfiguredforOSPF.WhichOSPFconfigurationstatementorsetofstatementswasenteredforrouterBtogeneratetheexhibitedroutingtable?
B(config-router)#network192.168.1.00.0.0.3area0
B(config-router)#network10.16.1.00.0.0.224area0
B(config-router)#network10.16.1.0255.255.255.224area0
B(config-router)#network192.168.1.0255.255.255.255area0
B(config-router)#network10.0.0.0255.255.255.255area0
Reset
ScoringRulefor:
correctnessofresponse
2pointsforOption1
AssessmentItem:
AfullyconvergedfiverouterOSPFnetworkhasbeenrunningsuccessfullyforseveralweeks.Allconfigurationshavebeensavedandnostaticroutesareused.Ifonerouterloosespowerandreboots,whatinformationwillbeinitsroutingtableaftertheconfigurationfileisloadedbutbeforeOSPFhasconverged?
Allroutesfortheentirenetworkwillbepresent.
Directlyconnectednetworksthatareoperationalwillbeintheroutingtable.
BecausetheSPFalgorithmhasnotcompletedallcalculations,norouteswillbeinthetable.
Asummaryrouteforallpreviouslylearnedrouteswillautomaticallyappearintheroutingtableuntilall
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