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问题描述:

[单选] 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 iemp 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
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