ccna题库_251-300

《ccna题库_251-300》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、QUESTION251Answer:BCF串口通过keepalive包保活端口。协议层down通常是时钟，封装，线缆使用不对造成Theshowinterfacesserial0/0commandresultedintheoutputshowninthegraphic.Whatarepossiblecausesforthisinterfacestatus?(Choosethree.)A.Theinterfaceisshutdown.B.Nokeepalivemessagesarereceived.C.Theclockrateis

2、notset.D.Noloopbackaddressisset.E.Nocableisattachedtotheinterface.F.Thereisamismatchintheencapsulationtype.QUESTION252Answer:BD私有地址的特性A：可以和互联网通信，错误B：不能和互联网通信，正确。C：能被互联网路由,错误D：用于节省IP地址，正确。通过nat实现。E：需要经过授权使用，错误WhichofthefollowingdescribeprivateIPaddresses?(Choosetwo.)

3、A.addresseschosenbyacompanytocommunicatewiththeInternetB.addressesthatcannotberoutedthroughthepublicInternetC.addressesthatcanberoutedthroughthepublicInternetD.aschemetoconservepublicaddressesE.addresseslicensedtoenterprisesorISPsbyanInternetregistryorganizationQUES

4、TION253Answer:BD考查VLSM。网关和主机IP需在同一个子网。路由器子接口IP为这个vlan中主机的网关Refertotheexhibit.Thenetworkshowninthediagramisexperiencingconnectivityproblems.Whichofthefollowingwillcorrecttheproblems?(Choosetwo.)A.ConfigurethegatewayonHostAas10.1.1.1.B.ConfigurethegatewayonHostBas10.1

5、.2.254.C.ConfiguretheIPaddressofHostAas10.1.2.2.D.ConfiguretheIPaddressofHostBas10.1.2.2.E.Configurethemasksonbothhoststobe255.255.255.224.F.Configurethemasksonbothhoststobe255.255.255.240.QUESTION254Answer:ACD接主机的都需要设置为access口Anetworkassociateistryingtounderstandth

6、eoperationoftheFLDCorporationbystudyingthenetworkintheexhibit.TheassociateknowsthattheserverinVLAN4providesthenecessaryresourcestosupporttheuserhostsintheotherVLANs.Theassociateneedstodeterminewhichinterfacesareaccessports.Whichinterfacesareaccessports?(Choosethree.

7、)A.Switch1-Fa0/2B.Switch1-Fa0/9C.Switch2-Fa0/3D.Switch2-Fa0/4E.Switch2-Fa0/8F.Router-Fa1/0QUESTION255Answer:CERefertotheexhibit.WhichdestinationaddresseswillHostAusetosenddatatoHostB?(Choosetwo.)A.theIPaddressofSwitch1B.theIPaddressofRouter1Fa0/0C.theIPaddressofHost

8、BD.theMACaddressofSwitch1E.theMACaddressofRouter1Fa0/0F.theMACaddressofHostBQUESTION256Answer:ADThenetworksecuritypolicyrequiresthatonlyon