有关CCNA真题的实验解释.doc

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1、【真题3】Giventhepartialrouterconfigurationinthegraphic.whydoestheP4S-PC1andP4S-PC2withtheIPaddress192.168.1.153/28failtoaccesstheinternet?(Choosetwo.)A.TheNATinsideinterfacesarenotconfiguredproperly.B.TheNAToutsideinterfacearenotconfiguredproperly.C.Therouterisnotproperlyconfiguredtousetheaccesscontr

2、ollistforNAT.D.TheNATpoolnotproperlyconfiguredtouseroutableoutsideaddresses.NAT地址池配错inside没配ACACL错应该是/28；地址本身也有问题Router>en↙Router#conft↙Router(config)#hostP4S-RA↙P4S-RA(config)#intf0/0↙题目中是E0/0P4S-RA(config-if)#ipadd192.168.1.129255.255.255.240↙P4S-RA(config-if)#noshut↙P4S-RA(config-if)#ipnatinsid

3、e↙题目中没设置P4S-RA(config-if)#intf0/1↙P4S-RA(config-if)#ipadd192.168.1.145255.255.255.240↙P4S-RA(config-if)#noshut↙P4S-RA(config-if)#ipnatinside↙题目中没设置P4S-RA(config-if)#ints0/0↙P4S-RA(config-if)#ipadd201.201.201.1255.255.255.0↙P4S-RA(config-if)#noshut↙P4S-RA(config-if)#ipnatoutside↙P4S-RA(config-if)#e

4、xitP4S-RA(config)#ipnatpoolSales201.201.201.5201.201.201.15netmask255.255.255.0↙配置允许被转换的地址列表P4S-RA(config)#access-list1permit192.168.1.00.0.0.255↙应该是0.0.0.15把允许被转换的地址列表和地址池对应起来P4S-RA(config)#ipnatinsidesourcelist1poolSales↙检测P4S-RA#showipnattranslations↙P4S-RA#showrunning-config↙‹outputomitted›前面部

5、分忽略!!interfaceFastEthernet0/0ipaddress192.168.1.129255.255.255.240duplexautospeedauto!interfaceFastEthernet0/1ipaddress192.168.1.145255.255.255.240duplexautospeedauto!interfaceSerial0/0ipaddress201.201.201.1255.255.255.0ipnatoutside!ipnatpoolSales201.201.201.5201.201.201.15netmask255.255.255.0ipcl

6、assless!!access-list1permit192.168.1.00.0.0.255与题目给出的一致