ccna200题库v20实验鸿鹄团队致力于为每一位网络技术爱好者提供帮助

学网络技术去鸿鹄有事您发帖，斑竹为您跑腿，给您答疑。CCNA题库战 欢迎备考CCNA的朋友加入，一起讨论交流，通过CCNA考试 题库/战报发布区 /forum-261-考试代号200-考试时间：110分通过分数题库版本：AnadministratoristryingtoandnetfromSwitchtoRouterwiththeresultsshownbelow:Switch>TypeescapesequencetoSending5,100-byteICMPEchosto,timeoutis2Successrateis0percent(0/5) netTrying%Destinationunreachable;gatewayorhostdownClicktheconsoleconnectedtoRouterandissuetheappropriatecommandstoanswerthequestions.PTK文件，因为部分命令模拟器不支持，所以配置和题库不一样，PKTACL条目不够，路由器配置以PDF题库为准。Router>enable(需要输入Router#showrunning-（命令显示不全，多按几次空格键即可WhichwillfixtheissueandallowONLYtoworkwhile net –Changetheipaccess- commandonfa0/0from“in”toC–Removeaccess-group106infrominterfacefa0/0andaddaccess-group115D–Removeaccess-group102outfrominterfaces0/0/0andaddaccess-group114E–Removeaccess-group106infrominterfacefa0/0andaddaccess-group104我们来看一下accesslist104:四条允许所有请求包，第五条所有回应包。要注意accesslist104应用Whatwouldbetheeffectofissuingthecommandipaccess-group114intothefa0/0 C–IPtrafficwouldbepassedthroughtheinterfacebutTCPandUDPtrafficwouldD–Routingprotocolupdatesforthenetworkwouldnotbeacceptedfromthefa0/0interfaceaccess-list114:access-list114permitip55允许来自/24Whatwouldbetheeffectofissuingthecommandipaccess-group115inonthes0/0/1interface? would –FTP,FTP-DATA,echo,andwwwwouldwork netwouldD–OnlytrafficfromthenetworkwouldpassthroughtheAnswer:ipaccess-group115inS0/0/1端口，会有什么影响？首先S0/0/1端口已经配置了ipaccess-group102inACL，所以当我们设置ipaccess-group115in，原先的ipaccess-group102in就被覆盖了。access-list115:access-list114permitipx.x.x.0，这样看来2.ACL-AnetworkassociateisaddingsecuritytotheconfigurationoftheCorp1router.TheuseronhostCshouldbeabletouseawebbrowsertoaccessfinancialinformationfromtheFinanceWebServer.NootherhostsfromtheLANnortheCoreshouldbeabletouseawebbrowsertoaccessthisserver.SincetherearemultipleresourcesforthecorporationatthislocationincludingotherresourcesontheFinanceWebServer,allothertrafficshouldbeallowed.Thetaskistocreateandapplyanumberedaccess-listwithnomorethanthreestatementsthatwillallowONLYhostCwebaccesstotheFinanceWebServer.NootherhostswillhavewebaccesstotheFinanceWebServer.AllothertrafficisAccesstotherouterCLIcanbegainedbyclickingontheappropriateAllpasswordshavebeentemporarilysettoTheCoreconnectionusesanIPaddressof(Corp1路由器的S口的IP，考试时要showIP对不对，不对就改ThecomputersintheHostsLANhavebeenassignedaddresses TheserversintheServerLANhavebeenassignedaddressesof7–TheFinanceWebServerisassignedanIPaddressof3.ThePublicWebServerisassignedanIPaddressof7Corp1路由器的S口的IP，考试时要show下IP对不对，不对就改，修改IPCorp1(config-if)#ipadd552(ip改为题目给的，掩码用showrun得到的原先错误IP的掩码)Corp1#showrunning-Corp1#configureCorp1(config)#access-list100permittcphosthost3eq80(允许从源主机为IP：到目的主机IP为：4的web流都可以使用。)Corp1(config)#access-list100denytcpanyhost3eqCorp1(config)#access-list100permitipany（允许所有流量 Corp1(config-if)#ipaccess-group100向，这样才能控制来自Core的流量）Corp1#copyrun（最后记得保存检测试验结果用PC的浏览器输入服务器的IP3ACL-中要就其他主机FinanceWebServer.）Acorporationwantstoaddsecuritytoitsnetwork.Therequirements>HostCshouldbeabletouseawebbrowser(HTTP)toaccesstheFinanceWeb>OthertypesofaccessfromhostCtotheFinanceWebServershouldbe>AllaccessfromhostsintheCoreorlocalLANtotheFinanceWebServershouldbe>AllhostsintheCoreandonlocalLANshouldbetoaccessthePublicWebYouhavebeentaskedtocreateandapplyanumberdaccesslisttoasingleoutboundinterface.TheycancontainnomorethanthreestatementsthatmeetstheseAccesstotherouterCLIcanbegainedbyclickingontheappropriatehost.Allpasswordshavebeentemporarilysetto"cisco".TheCoreconnectionusesanIPaddressof5←Corp1路由器的SIP，考试时要show下IP对不对ThecomputersintheHostsLANhavebeenassignedaddressesof-HostAHostBHostCHostDTheserversintheServerLANhavebeenassignedaddressesof7-TheFinanceWebServerisassignedanIPaddressofCorp1路由器的S口的IP，考试时要show下IP对不对，不对就改，修改IPCorp1#configureCorp1(config-if)#ipadd552(ip改为题目给的，掩码用showrun得到的原先错误IP的掩码)确定连接服务器的接口为Corp1#configureCorp1(config)#access-list100permittcphosthost3eq80Corp1(config)#access-list100denyipanyhost3Corp1(config)#access-list100permitipanyanyCorp1(config)#interfacefa0/1Corp1(config-if)#ipaccess-group100outCorp1#copyrunning-configstartup-1.Corp1(config)#access-list100permittcphosthost3为：3的80端口。eq的意思是等于端。Corp1(config)#access-list100denyipanyhost3。IPCorp1(config)#access-list100permitipanyShowrun.30IP.30show找出IP为.30的接口就OK了然后把ACLCorp1(config)#interfacefa0/1Corp1(config-if)#ipaccess-group100out最后就是这2Showrun.30IP是在f0/1口上。直接进入F0/1把创建的扩展列表应用进去，最后千万记得CopyrunStartRefertothetopology.Your hasdecidedtoconnectthemainofficewiththreeotherremotebranchofficesusingpoint-to-pointseriallinks.YouarerequiredtotroubleshootandresolveOSPFneighboradjacencyissuesbetweenthemainofficeandtherouterslocatedintheremotebranchoffices.QuestionAnOSPFneighboradjacencyisnotformedbetweenR3inthemainofficeandR4intheBranch1office.Whatiscausingtheproblem?ThereisanareaIDThereisaLayer2issue;anencapsulationmismatchonserialThereisan oanddeadintervalTheR3routerIDisconfiguredonAnswer:R4R4#showrunning-!interfacedescription**ConnectedtoR3-MainBranchoffice**ipaddress52encapsulationpppipospf4area2!R3#showrunning-!interfacedescription**ConnectedtoR4-Branch1office**ipaddress52encapsulationpppipospf3area0!area2QuestionAnOSPFneighboradjacencyisnotformedbetweenR3inthemainofficeandR5intheBranch2office.Whatiscausingtheproblem?ThereisanareaIDThereisaPPPauthenticationissue;apasswordThereisanOSPFoanddeadintervalThereisamissingnetworkcommandintheOSPFprocessonAnswer:R5#showrunning-!interfacedescription**ConnectedtoR3-MainBranchoffice**ipaddress52encapsulationpppipospf5area0!R3#showrunning-!interfacedescription**ConnectedtoR5-Branch2office**ipaddress52R5#showrunning-!interfacedescription**ConnectedtoR3-MainBranchoffice**ipaddress52encapsulationpppipospf5area0!R3#showrunning-!interfacedescription**ConnectedtoR5-Branch2office**ipaddress52ipospf o-interval50ipospf3area0!R5#shR5#shipospfintR3#shipospfintSerial1/1isup,lineprotocolisProcessID3,RouterID,NetworkTypePOINT_TO_POINT,Cost:64Enabledbyinterfaceconfig,includingsecondaryipaddressesTransmitDelayis1sec,StateTimerintervalsconfigured, o50,Dead200,Wait200,Retransmit5oob-resynctimeout200odueinSupportsLink-localSignaling(LLS)Index2/2,floodqueuelength0Next0×0(0)/0×0(0)Lastfloodscanlengthis umisLastfloodscantimeis0msec, umis0msecNeighborCountis0,Adjacentneighborcountis0 ofor0neighbor(s)Serial1/0Serial1/0isup,lineprotocolisProcessID5,RouterID,NetworkTypePOINT_TO_POINT,Cost:64Enabledbyinterfaceconfig,includingsecondaryipaddressesTransmitDelayis1sec,StateTimerintervalsconfigured,o10,Dead40,Wait40,Retransmit5oob-resynctimeout40odueinSupportsLink-localSignaling(LLS)Index1/1,floodqueuelength0Next0×0(0)/0×0(0)Lastfloodscanlengthis0,umisLastfloodscantimeis0msec,umis0msecNeighborCountis0,Adjacentneighborcountis0 ofor0neighbor(s)QuestionR1doesnotformanOSPFneighboradjacencywithR2.Whichoptionwouldfixtheissue?R1ethernet0/1isshutdown.ConfigurenoshutdownR1ethernet0/1configuredwithanon-defaultOSPFointervalof25;configurenoipospfo-interval25R2ethernet0/1andR3ethernet0/0areconfiguredwithanon-defaultOSPFointervalof25;configurenoipospfo-interval25EnableOSPFforR1ethernet0/1;configureipospf1area0commandunderethernet0/1Answer:R1#showR1#showrunning-!interfacedescription**ConnectedtoL2SW**ipaddressipospf ipospf1area0!R2#showR2#showrunning-!interfacedescription**ConnectedtoL2SW**ipaddressipospf2area!R1设置了ipospfo-interval25导致和R2的o和dead时间不一样。所以需要再R1上配置noipospfo-interval25，使用默认的o时间。QuestionAnOSPFneighboradjacencyisnotformedbetweenR3inthemainofficeandR6intheBranch3office.Whatiscausingtheproblem?ThereisanareaIDThereisaPPPauthenticationissue;theusernameisnotconfiguredonR3andR6.ThereisanOSPFoanddeadintervalTheR3routerIDisconfiguredonAnswer:R3#showR3#showrunning-usernameR6password!interfacedescription**ConnectedtoR6-Branch3office**ipaddress52encapsulationpppipospf3area0!!routerospf!<<outputR6#showR6#showrunning-usernameR3password!interfacedescription**ConnectedtoR3-MainBranchoffice**ipaddress052encapsulationpppipospf6area0!!routerospf!5.EIGRPRefertothetopology.YourhasconnectedtheroutersR1,R2andR3withseriallinks.R2andR3areconnectedtotheswitchesSW1andSW2,respectively.SW1andSW2arealsoconnectedtotheroutersR4andR5.TheEIGRProutingprotocolisconfigured.YouarerequiredtotroubleshootandresolvetheEIGRPissuesbetweenthevariousrouters.UsetheappropriateshowcommandstotroubleshoottheQuestionTheloopbackinterfacesonR4withtheIPaddressesof/32,/32and/32arenotappearingintheroutingtableofR5.Whyaretheinterfacesmissing?Theinterfacesareshutdown,sotheyarenotbeingR4hasbeenincorrectlyconfiguredtobeinanotherAS,soitdoesnotpeerwithR5.Automaticsummarizationisenabled,soonlythenetworkisdisyed.Theloopbackaddresseshaven’tbeenadvertised,andthenetworkcommandismissingonR4.Answer:R4EIGRPAS2AS1QuestionWhichpathdoestraffictakefromR1toThetrafficgoesthroughThetrafficgoesthroughThetrafficisequallyload-balancedoverR2andThetrafficisunequallyload-balancedoverR2andAnswer:，出端口是S1/3,所以是通过R2R5.QuestionRouterR6doesnotformanEIGRPneighborrelationshipcorrectlywithrouterR1.Whatisthecauseforthismisconfiguration?TheKvaluesTheASdoesnotThenetworkcommandisThepassive-interfacecommandisAnswer:QuestionStudythefollowingoutputtakenon5sourceTypeescapesequencetoSending5,100-byteICMPEchosto5,timeoutis2seconds:Packetsentwithasourceaddressof.....Successrateis0percentWhyaresA.ThenetworkstatementismissingonB.TheloopbackinterfaceisshutdownonC.ThenetworkstatementismissingonD.TheIPaddressthatisconfiguredontheLo1interfaceonR5isAnswer:R1并没有将 以为源地址 R5不通。注意：本题跟实际考试中拓扑、题目要求、选项相同。但是路由器配置有些变动，具体变动参考以下内容QuestionTheloopbackinterfacesonR4withtheIPaddressesof/32,/32and/32arenotappearingintheroutingtableofR5.Whyaretheinterfacesmissing?A.Theinterfacesareshutdown,sotheyarenotbeingB.R4hasbeenincorrectlyconfiguredtobeinanotherAS,soitdoesnotpeerwithR5.C.Automaticsummarizationisenabled,soonlythenetworkismandismissingonR4.也就是选DQuestionWhichpathdoestraffictakefromR1toA.ThetrafficgoesthroughB.ThetrafficgoesthroughC.Thetrafficisequallyload-balancedoverR2andD.Thetrafficisunequallyload-balancedoverR2and在考试中查看到R2，R3这两条的路径都是等值的，所以选QuestionRouterR6doesnotformanEIGRPneighborrelationshipcorrectlywithrouterR1.Whatisthecauseforthismisconfiguration?A.TheKvaluesB.TheASdoesnotC.ThenetworkcommandisD.Thepassive-interfacecommandis题库是选C（R6没有网段showipprotocolsKQuestionR1#5sourceTypeescapesequencetoSending5,100-byteICMPEchosto5,timeoutis2seconds:Packetsentwithasourceaddressof....Successrateis0percent0/5)R1为什么不通R5？A.ThenetworkstatementismissingonB.TheloopbackinterfaceisshutdownonC.ThenetworkstatementismissingonD.TheIPaddressthatisconfiguredontheLo1interfaceonR5D.TheI