第二章思科高级网络互联英文版答案.docx
《第二章思科高级网络互联英文版答案.docx》由会员分享，可在线阅读，更多相关《第二章思科高级网络互联英文版答案.docx（16页珍藏版）》请在冰豆网上搜索。
第二章思科高级网络互联英文版答案
1.WhatisacharacteristicofVTP?
o
SwitchesinVTPclientmodestoreVLANinformationinNVRAM.
o
SwitchesinVTPtransparentmodeforwardVTPadvertisements.
o
SwitchesinVTPservermodecannotbeupdatedbyswitchesinVTPclientmode.
o
SwitchesinVTPtransparentmoderevertbacktoVTPservermodeafterareboot.
Explanation:
AllswitchesinthesameVTPdomainforwardadvertisementstootherswitches.
2.WhichtwoVTPparametersmustbeidenticalonallswitchesinthenetworkinordertoparticipateinthesameVTPdomain?
（Choosetwo.）
o
VTPdomainname
o
VTPrevisionnumber
o
VTPdomainpassword
o
VTPservermode
o
VTPclientmode
o
VTPtransparentmode
Explanation:
VTPupdatesaresenttootherswitchesinthesamedomainwiththesamepassword.TheconfigurationrevisionnumberisusedtodeterminewhetheraswitchkeepsitsexistingVLANdatabaseorupdatesitwiththenewinformation.
3.WhichtwoeventswillcausetheVTPrevisionnumberonaVTPservertochange?
（Choosetwo.）
o
addingVLANs
o
rebootingtheswitch
o
changingtheVTPdomainname
o
changingtheswitchtoaVTPclient
o
changinginterfaceVLANdesignations
Explanation:
ChangingtheVTPdomainnamealwaysresetstheVTPrevisionnumberto0.ThisisanimportantstepinaddingswitchestoanexistingVTPdomainnomatterwhatVTPmodetheswitchuses.
4.Giventhefollowingconfiguration,whichtwostatementsaretrue?
（Choosetwo.）
switch（vlan）#vtpversion2
switch（vlan）#vtpmodeserver
switch（vlan）#vtpdomainCisco
switch（vlan）#vtppasswordmypassword
o
Thisswitchcancreate,modify,anddeleteallVLANswithintheCiscodomain.
o
ThisswitchmaintainsafulllistofallVLANsandcancreateVLANs,butcannotdeleteormodifyexistingVLANs.
o
ThepasswordwillpreventunauthorizedroutersfromparticipatingintheCiscodomain.
o
ThisswitchcanadvertiseitsVLANconfigurationtootherswitchesintheCiscodomainonly,butcanreceiveadvertisementsfromotherdomains.
o
ThisswitchcansendandreceiveadvertisementsfromonlytheCiscodomain.
Explanation:
AswitchinVTPservermodecancreate,modify,anddeleteVLANsaswellastransmitthatinformation（iftheswitchhasthehighestVTPconfigurationrevisionnumber）tootherswitchesinthesameVTPdomain.
5.Whereisthevlan.datfilestoredonaswitch?
o
inRAM
o
inNVRAM
o
inflashmemory
o
ontheexternallyattachedstoragemediaorinternalharddrive
Explanation:
NormalrangeVLANconfigurationsarestoredwithinaVLANdatabasefile,calledvlan.dat,whichislocatedintheflashmemoryoftheswitch.
6.AswitchisparticipatinginaVTPdomainandconfiguredasaVTPserver.TheswitchneedstopropagateVLAN10（usedbytheManufacturingdepartment）throughouttheVTPdomain,butdoesnothaveanydirectlyconnectedhostsusingthatparticularVLAN.Whichconfigurationwouldsatisfythisrequirement?
o
interfacefa0/24
switchportmodeaccess
switchportaccessvlan10
o
interfaceg0/1
switchportmodetrunk
switchporttrunknativevlan10
o
vlan10
nameManufacturing
exit
o
vtpmodeserver
vtppasswordManufacturing
Explanation:
ThebestpracticetoaddaVLANtotheVLANdatabasewithnolocalhoststobeinthatVLANistoconfigurethatVLAN（vlan10）withitsname（nameManufacturing）andusethe exit commandtocompletetheconfiguration.DonotassignanyswitchinterfacestothatVLAN.
7.WhichcommandshouldthenetworkadministratorimplementtopreventthetransferofDTPframesbetweenaCiscoswitchandanon-Ciscoswitch?
o
S1（config-if）#switchportmodetrunk
o
S1（config-if）#switchportnonegotiate
o
S1（config-if）#switchportmodedynamicdesirable
o
S1（config-if）#switchportmodeaccess
o
S1（config-if）#switchporttrunkallowedvlannone
Explanation:
TopreventDTPframesfrombeinggeneratedbytheinterfaceofaCiscoswitch,usetheS1（config-if）# switchportnonegotiate command.DTPisCiscoproprietaryandnotusablebyothervendors.
8.UnderwhichtwooccasionsshouldanadministratordisableDTPwhilemanagingalocalareanetwork?
（Choosetwo.）
o
whenconnectingaCiscoswitchtoanon-Ciscoswitch
o
whenaneighborswitchusesaDTPmodeofdynamicauto
o
whenaneighborswitchusesaDTPmodeofdynamicdesirable
o
onlinksthatshouldnotbetrunking
o
onlinksthatshoulddynamicallyattempttrunking
Explanation:
CiscobestpracticerecommendsdisablingDTPonlinkswheretrunkingisnotintendedandwhenaCiscoswitchisconnectedtoanon-Ciscoswitch.DTPisrequiredfordynamictrunknegotiation.
9.Whichcommanddisplaystheencapsulationtype,thevoiceVLANID,andtheaccessmodeVLANfortheFa0/1interface?
o
showvlanbrief
o
showinterfacesFa0/1switchport
o
showmacaddress-tableinterfaceFa0/1
o
showinterfacestrunk
Explanation:
The showinterfacesswitchport commanddisplaysthefollowinginformationforagivenport:
Switchport
AdministrativeMode
OperationalMode
AdministrativeTrunkingEncapsulation
OperationalTrunkingEncapsulation
NegotiationofTrunking
AccessModeVLAN
TrunkingNativeModeVLAN
AdministrativeNativeVLANtagging
VoiceVLAN
10.Refertotheexhibit.CommunicationbetweentheVLANsisnotoccurring.Whatcouldbetheissue?
CCNA2v6.0Chapter2Exam006
o
Thewrongportontherouterhasbeenused.
o
TheGi1/1switchportisnotintrunkingmode.
o
Aduplexissueexistsbetweentheswitchandtherouter.
o
DefaultgatewayshavenotbeenconfiguredforeachVLAN.
Explanation:
ThesubinterfacescouldnothaveanIPaddressunlesstheencapsulationmodehadbeenconfigured.Whenaduplexissueexists,communicationcanstilloccur,butitisataslowerthanoptimumrate.
11.Refertotheexhibit.Anetworkadministratorisconfiguringinter-VLANrouting.However,thecommunicationbetweenVLAN10andVLAN20fails.Basedontheoutputoftheshowvlancommand,whatisthecauseoftheproblem?
CCNA2v6.0Chapter2Exam005
o
Gi1/1andGi1/2arenotconfiguredastrunkmode.
o
Gi1/1andGi1/2arenotassignedtotheirrespectiveVLANs.
o
TheIPaddressesonGi0/0andGi0/1areswitchedbymistake.
o
TheIPaddressesonGi0/0andGi0/1arenotonthesamenetwork.
Explanation:
Becausetwophysicalinterfacesontherouterareconnectedtotwophysicalportsonaswitch,thisisalegacyinter-VLANconfiguration.Withlegacyinter-VLAN,theportsontheswitchthatareconnectedtotherouterneedtobeinaccessmodeandassignedtheirrespectiveVLANs.Asshowninthedisplay,thesetwoportsarestillinVLAN1.TheIPaddressontherouterinterfacecanbeconfiguredasneeded,aslongasthedevicesonthesameVLANareinthesamenetwork.
12.Refertotheexhibit.Anetworkadministratorisverifyingtheconfigurationofinter-VLANrouting.UserscomplainthatPC2cannotcommunicatewithPC1.Basedontheoutput,whatisthepossiblecauseoftheproblem?
CCNA2v6.0Chapter2Exam004
o
Gi0/0isnotconfiguredasatrunkport.
o
ThecommandinterfaceGigabitEthernet0/0.5wasenteredincorrectly.
o
ThereisnoIPaddressconfiguredontheinterfaceGi0/0.
o
Thenoshutdowncommandisnotenteredonsubinterfaces.
o
Theencapsulationdot1Q5commandcontainsthewrongVLAN.
Explanation:
Inrouter-on-a-stick,thesubinterfaceconfigurationshouldmatchtheVLANnumberintheencapsulationcommand,inthiscase,thecommand encapsulationdot1Q10 shouldbeusedforVLAN10.Sincesubinterfacesareused,thereisnoneedtoconfigureIPonthephysicalinterfaceGi0/0.Thetrunkmodeisconfiguredontheswitchportthatconnectstotherouter.Thesubinterfacesareturnedonwhentheyareadded.
13.WhathappenstoswitchportsaftertheVLANtowhichtheyareassignedisdeleted?
o
Theportsaredisabled.
o
Theportsareplacedintrunkmode.
o
TheportsareassignedtoVLAN1,thedefaultVLAN.
o
Theportsstopcommunicatingwiththeattacheddevices.
Explanation:
TheaffectedportsmustbereconfiguredforanactiveVLAN.
14.Refertotheexhibit.AfterattemptingtoentertheconfigurationthatisshowninrouterRTA,anadministratorreceivesanerrorandusersonVLAN20reportthattheyareunabletoreachusersonVLAN30.Whatiscausingtheproblem?
CCNA2v6.0Chapter2Exam002
o
Dot1qdoesnotsupportsubinterfaces.
o
ThereisnoaddressonFa0/0touseasadefaultgateway.
o
RTAisusingthesamesubnetforVLAN20andVLAN30.
o
ThenoshutdowncommandshouldhavebeenissuedonFa0/0.20andFa0/0.30.
Explanation:
TheIP192.168.2.49/27and192.168.3.62/27belongtothesamesubnetof192.168.3.32/27.ValidhostIPv4addressesinclude192.168.3.33to192.168.3.62.
15.Refertotheexhibit.Arouter-on-a-stickconfigurationwasimplementedforVLANs15,30,and45,accordingtotheshowrunning-configcommandoutput.PCsonVLAN45thatareusingthe172.16.45.0/24networkarehavingtroubleconnectingtoPCsonVLAN30inthe172.16.30.0/24network.Whicherrorismostlikelycausingthisproblem?
CCNA2v6.0Chapter2Exam003
o
ThewrongVLANhasbeenconfiguredonGigabitEthernet0/0.45.
o
ThecommandnoshutdownismissingonGigabitEthernet0/0.30.
o
TheGigabitEthernet0/0interfaceismissinganIPaddress.
o
ThereisanincorrectIPaddressconfiguredonGigabitEthernet0/0.30.
Explanation:
hesubinterfaceGigabitEthernet0/0.30hasanIPaddressthatdoesnotcorrespondtotheVLANaddressingscheme.ThephysicalinterfaceGigabitEthernet0/0doesnotneedanIPaddressforthesubinterfacestofunction.Subinterfacesdonotrequirethe noshutdowncommand.
16.HowareIPaddressingdesignsaffectedbyVLANimplementations?
o
VLANsdonotsupportV
升级会员 