CCNA(640-802)题库 V104.2下卷

学网络技术去鸿鹄论坛命运的改变从技术开始鸿鹄团队致力于为每一位网络技术爱好者提供帮助有事您发帖，斑竹为您跑腿，给您答疑。CCNACCNACCNACCNA题库战报交流群：82327397823273978232739782327397欢迎备考CCNACCNACCNACCNA的朋友加入，一起讨论交流，通过CCNACCNACCNACCNA考试！CCNACCNACCNACCNA最新题库////最新战报发布区：://bbs.hh010.com/forum-261-1.html://bbs.hh010.com/forum-261-1.htmlCCNACCNACCNACCNA考试代号：640-802640-802640-802640-802考试时间：中文110110110110分钟英文110+30=140110+30=140110+30=140110+30=140分钟通过分数：825825825825题库版本：V104.2V104.2V104.2V104.2ExamAQUESTION1Refertotheexhibit.WhatcouldbepossiblecausesfortheSerial0/0isdowninterfacestatus?(Choosetwo.)A.ALayer1problemexists.B.Thebandwidthissettoolow.C.Aprotocolmismatchexists.D.Anincorrectcableisbeingused.E.ThereisanincorrectIPaddressontheSerial0/0interface.Answer:ADSection:(none)Explanation/Reference:接口双down，证明物理层就有问题，所以这一题主要排查的问题首先是物理层QUESTION2Beforeinstallinganew,upgradedversionoftheIOS,whatshouldbecheckedontherouter,andwhichcommandshouldbeusedtogatherthisinformation?(Choosetwo.)A.theamountofavailableROMB.theamountofavailableflashandRAMmemoryC.theversionofthebootstrapsoftwarepresentontherouterD.showversionE.showprocessesF.showrunning-configAnswer:BDSection:(none)Explanation/Reference:在升级IOS的时候，我们主要注意以下几点：1.flash空间是否充足2.查看设备的版本对是否支持IOSQUESTION3Refertotheexhibit.AfterHostApingsHostB,whichentrywillbeintheARPcacheofHostAtosupportthistransmission?A.B.C.D.E.F.Answer:DSection:(none)Explanation/Reference:在以太网寻址的时候，依靠的事MAC地址，每一个网段都需要寻找到自己的下一条（gateway）以自己的MAC作为sourcegateway的mac作为destination封装Frame，然后将Frame转发出去，但是数据包是不会进行变化的，也就是packet的头部信息不会发生改变。所以IP包头的source和des地址是不会变更的QUESTION4Refertotheexhibit.WhichtwostatementsaretrueaboutinterVLANroutinginthetopologythatisshownintheexhibit?(Choosetwo.)A.HostEandhostFusethesameIPgatewayaddress.B.Router1andSwitch2shouldbeconnectedviaacrossovercable.C.Router1willnotplayaroleincommunicationsbetweenhostAandhostD.D.TheFastEthernet0/0interfaceonRouter1mustbeconfiguredwithsubinterfaces.E.Router1needsmoreLANinterfacestoaccommodatetheVLANsthatareshownintheexhibit.F.TheFastEthernet0/0interfaceonRouter1andSwitch2trunkportsmustbeconfiguredusingthesameencapsulationtype.Answer:DFSection:(none)Explanation/Reference:在单臂路由的时候，首先路由器的接口要配置子接口针对每一个vlan一个逻辑接口，其次交换机的接口要配置trunk，并且封装要和路由器接口的封装一致QUESTION5Refertotheexhibit.WhichtwostatementsaretrueabouttheloopbackaddressthatisconfiguredonRouterB?(Choosetwo.)A.ItensuresthatdatawillbeforwardedbyRouterB.B.ItprovidesstabilityfortheOSPFprocessonRouterB.C.ItspecifiesthattherouterIDforRouterBshouldbe10.0.0.1.D.ItdecreasesthemetricforroutesthatareadvertisedfromRouterB.E.ItindicatesthatRouterBshouldbeelectedtheDRfortheLAN.Answer:BCSection:(none)Explanation/Reference:loopback口作为在ospf当中，第一个ospf优先选择loopback作为RID，loopback作为RID可以保障ospf的稳定性，因为loopback接口只有当路由器不可用的时候才会downQUESTION6AnetworkadministratorisexplainingVTPconfigurationtoanewtechnician.WhatshouldthenetworkadministratortellthenewtechnicianaboutVTPconfiguration?(Choosethree.)A.AswitchintheVTPclientmodecannotupdateitslocalVLANdatabase.B.AtrunklinkmustbeconfiguredbetweentheswitchestoforwardVTPupdates.C.AswitchintheVTPservermodecanupdateaswitchintheVTPtransparentmode.D.AswitchintheVTPtransparentmodewillforwardupdatesthatitreceivestootherswitches.E.AswitchintheVTPservermodeonlyupdatesswitchesintheVTPclientmodethathaveahigherVTPrevisionnumber.F.AswitchintheVTPservermodewillupdateswitchesintheVTPclientmoderegardlessoftheconfiguredVTPdomainmembership.Answer:ABDSection:(none)Explanation/Reference:VTP的三个角色，以及VTP的特性，第一Client不能够增删改vlan信息，也就是不能update自己本地的vlandatabase，第二在配置vtp的两台交换机中间必须是trunk口用来传递vtp的通告以及vtp的根新第三在transparent模式的交换机讲转发它所收到的vtp更新以及vtp通告信息QUESTION7WhichtwolocationscanbeconfiguredasasourcefortheIOSimageinthebootsystemcommand?(Choosetwo.)A.RAMB.NVRAMC.flashmemoryD.HTTPserverE.TFTPserverF.TelnetserverAnswer:CESection:(none)Explanation/Reference:此题是一个概念性的题目，设备在读取IOS的时候有两种方式。一种是本地flash中的。一种是存储在TFTPserver中的flash叶就是网络读取QUESTION8WhataretworeasonsanetworkadministratorwoulduseCDP?(Choosetwo.)A.toverifythetypeofcableinterconnectingtwodevicesB.todeterminethestatusofnetworkservicesonaremotedeviceC.toobtainVLANinformationfromdirectlyconnectedswitchesD.toverifyLayer2connectivitybetweentwodeviceswhenLayer3failsE.toobtaintheIPaddressofaconnecteddeviceinordertotelnettothedeviceF.todeterminethestatusoftheroutingprotocolsbetweendirectlyconnectedroutersAnswer:DESection:(none)Explanation/Reference:CDP是一个二层协议，可以用来确认二层的连通性，以及查看远端3层的IP地址QUESTION9Refertotheexhibit.Bothswitchesareusingadefaultconfiguration.Whichtwodestinationaddresseswillhost4usetosenddatatohost1?(Choosetwo.)A.theIPaddressofhost1B.theIPaddressofhost4C.theMACaddressofhost1D.theMACaddressofhost4E.theMACaddressoftheFa0/0interfaceoftheR1routerF.theMACaddressoftheFa0/1interfaceoftheR1routerAnswer:AFSection:(none)Explanation/Reference:E太网在进行寻址的时候，通过ARP请求道网关的MAC地址，将其封装到Frame的dest地址，Packet的sourceip和destip封装的事自己的IP作为source需要访问的终点的IP作为destIPQUESTION10Refertotheexhibit.Therouterhasbeenconfiguredwiththesecommands:hostnameGatewayinterfaceFastEthernet0/0ipaddress198.133.219.14255