問題詳情

21封禁ICMP协议，只转发212.78.170.166/27所在子网的所有站点的ICMP数据包，正确的access-list配置是
(A) Router(config #access-list 110 permit icmp 212.78.170.166 0.0.0.0 any　　Router(config #access-list 110 deny icmp any any　　　　Router(config #access-list 110 permit ip any any
(B) Router(config #access-list 110 permit icmp 212.78.170.0 255.255.255.224 any　　　 Router(config #access-list 110 permit ip any any　　　 Router(config #access-list 110 deny icmp any any
(C) Router(config #access-list 110 perimt icmp 212.78.170.0 0.0.0.255 any　　Router(config #access-list 110 deny icmp any any　　　　Router(config #access-list 110 permit ip any any
(D) Router(config #access-list 110 permit icmp 212.78.170.160 0.0.0.31 any　　Router(config #access-list 110 deny icmp any any　　　　Router(config #access-list 110 permit ip any any

參考答案

答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)