23.YouarethenetworkadministratoratABC.com.ABChasaswitchednetwork.
Youwanttocontrolthedesignationofthespanning-treerootbridgeintheABCnetwork.Whatshouldyoudo?

A.Byenablinguplink-fastontheportsofthedesiredswitch.
B.Byloweringthebridgepriorityonthedesiredswitch.
C.BysettingalowerMACaddressonthedesignatedswitch.
D.ByraisingthebridgeIDononeswitch.

24.YouareatechnicianatABC.YoureceiveareportfromseveralABCuserswho
complainthattheygetslowresponseswhensendingandreceivingemail,especially
whenbrowsingtheInternet.Youinvestigatethecomplaintbycheckingtheoutput
ofapingcommandissuedfromhercomputerandfindthatitindicatesintermitted
successandfailuresmessages,whenattemptingtocontacttheemailserver.A
tracerttothecorporateInternetgatewayroutershowshighlatencyandoccasional
timeoutmessages.
Whatwouldbethemosteffectivetroubleshootingapproachifyouaretodetermine
thecauseoftheslowresponsetime?

A.Bottom-upapproach
B.Randomaccessapproach
C.Divideandconquerapproach
D.Top-downapproach
E.Top-downrule-outapproach

25.YouareatechnicianatABC.com.YournewlyappointedABCtraineewantsto
knowwhatfeaturesmakeOSPFmoresuitablethanRPinlargenetworkinstallations.
Whatwouldyourreplybe?(Chooseallthatapply.)

A.DiffusingUpdateAlgorithm
B.Nohopcountlimitation
C.Higherroutingupdateoverhead
D.Fasterconvergence
E.Lowerroutingupdateoverhead

CCIE

26.YouarethenetworkadministratoratABC.Youaretroubleshootinganetwork
problem.YouwanttotracetheroutetoaUnixworkstationthatyouwanttoreach
throughtheInternet.However,Traceroutedoesnotwork.
Currently,thereisaninboundaccess-listappliedtotheserialinterfaceon
Router1.Anentryintheaccess-liststates"access-list101permittcpanyany".
Whataccess-list

entrymayyouneedtobeaddedtotheaccess-listinordertogettracerouteto
work?

A.access-list101permitudpanyany
B.access-list101permiticmpanyanytime-exceededaccess-list101permiticmp
anyanyport-unreachable
C.access-list101permiticmpanyanytime-exceededaccess-list101permiticmp
anyanynet-unreachable
D.access-list101permiticmpanyanyechoaccess-list101permiticmpanyany

net-unreachable
E.access-list101permitudpanyanyaccess-list101permiticmpanyany
protocol-unreachable

27.WhatdoestheBGPbackdoorcommanddo?

A.ItchangesthedistanceofaniBGProuteto20.
B.ItchangesthedistanceofaneBGProuteto200.
C.ItchangesthedistanceofanIGProuteto20.
D.Itdoesnoteffectanychangesindistanceoftheroute.
E.ItchangesthedistanceofanIGRProuteto200.

28.WhichofthefollowingDNSresourcerecordsisnotvalid?

A.NS
B.PTR
C.MX
D.FQDN
E.A

29.WhichofthefollowingfeaturesisprovidedbyRIPv2thatwerepreviously
notpossiblewithRIPv1?(Chooseallthatapply.)

A.Classlessroutingandsplit-horizon.
B.Poisonreverseandupdatingtomulticastaddresses.
C.Poisonreverseandclasslessrouting.
D.Classlessroutingandupdatingtomulticastaddresses.
E.Routetagandclasslessrouting.

30.WhichofthefollowingstatementsisvalidwhentakingCustomQueuinginto
account?

A.Customqueuinghastheabilitytorestrictaparticulartypeoftraffictoa
givenbandwidthnotmatterwhatisloadislikeonthatlink.

CCNA、CCNP、CCIE模拟试题(三)
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