计算机四级

单选题Cisco路由器第3模块第1端口通过E1标准的DDN专线与一台远程路由器相连,端口的IP地址为195.112.41.81/30,远程路由器端口封装PPP协议。下列路由器的端口配置,正确的是

A.Router (config)#interface s3/1
Router (config-if)#bandwidth 2048
Router (config-if)#ip address 195.112.41.81 255.255.255.252
Router (config-if)#encapsulation ppp
Router (config-if)#exit
B.Router (config)#interface a3/1
Router (config-if)#bandwidth 2000
Router (config-if)#ip address 195.112.41.81 255.255.255.252
Router (config-if)#encapsulation ppp
Router (config-if)#exit
C.Router (config)#interface s3/1
Router (config-if)#bandwidth 2
Router (config-if)#ip address 195.112.41.81 255.255.255.252
Router (config-if)#encapsulation ppp
Router (config-if)#exit
D.Router (config)#interface s3/1
Router (config-if)#bandwidth 2048
Router (config-if)#ip address 195.112.41.81 255.255.255.252
Router (config-if)#encapsulation hdlc
Router (config-if)#exit

参考答案:A进入在线模考
解析:题中路由器的端口配置方法如下:
步骤一:进入第3模块第1端口配置模式(config)#interface s3/1
步骤二:设置带宽,其中E1速率为2.048Mbps,所以设置带宽为2048 (config-if)#bandwidth 2048
步骤三:配置端口通信IP地址与子网掩码(config-if)#ip address 195.112.41.81 255.255.255.252
步骤四:设置远程路由器端口封装PPP协议,(config-if)#encapsulation ppp
步骤五:退出(config-if)#exit

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