题目内容

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 s3/1Router(config-if)#bandwidth 2048Router(config-if)#ip address 195.112.41.81255.255.255.252Router(config-if)#encapsulation PPPRouter(config-if)#exit
B. Router(config)#interface a3/1Router(config-if)#bandwidth 2000Router(config-if)#ip address 195.112.41.81 255.255.255.252Router(config-if)#encapsulation PPPRouter(config-if)#exit
C. Router(config)#interface s3/1Router(config-if)#bandwidth 2Router(config-if)#ip address 195.112.41.81 255.255.255.252Router(config-if)#encapsulation PPPRouter(config-if)#exit
D. Router(config)#interface s3/1Router(config-if)#bandwidth 2048Router(config-if)#ip address 195.112.41.81255.255.255.252Router(config-if)#encapsulation hdlcRouter(config-if)#exit

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在一台Cisco路由器上执行show access-lists命令显示如下一组信息 Extended IP access list port4444 permit icmp 202.38.97.0，wildcard bits 0.0.0.255 any deny icmp any any deny udp any any eq 1434 deny tcp any any eq 4444 permit ip any any 根据上述信息，正确的access-list的配置是

A. Router(config) # ip access-list extended port4444Router(config-ext-nacl) # deny icmp any anyRouter(config-ext-nacl) # deny udp any any eq 1434Router(config-ext-nacl) # deny tcp any any eq 4444Router(config-ext-nacl) # permit icmp 202.38.97.0 0.0.0.255 anyRouter(config-ext-nacl) # permit ip any any
B. Router(config) # access-list port4444 permit icmp 202.38.97.0 0.0.0.255 anyRouter(config) # access-list port4444 deny icmp any anyRouter(config) # access-list port4444 deny udp any any eq 1434Router(config) # access-list port4444 deny tcp any any eq 4444Router(config) # access-list port4444 permit ip any any
C. Router(config) # ip access-list extended port4444Router(config-ext-nacl) # permit 202.38.97.0 0.0.0.255 any icmpRouter(config-ext-nacl) # deny any any icmpRouter(config-ext-nacl) # deny any any udp eq 1434Router(config-ext-nacl) # deny any any tcp eq 4444Router(config-ext-nacl) # permit ip any any
D. Router(config) # ip access-list extended port4444Router(config-ext-nacl) # permit icmp 202.38.97.0 0.0.0.255 anyRouter(config-ext-nacl) # deny icmp any anyRouter(config-ext-nacl) # deny udp any any eq 1434Router(config-ext-nacl) # deny tcp any any eq 4444Router(config-ext-naci) # permit ip any any

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