定义一个用于封禁ICMP协议而只允许转发166.129.130.0/24子网的ICMP数据包的访问控制列表,Cisco路由器的正确配置是

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问题 定义一个用于封禁ICMP协议而只允许转发166.129.130.0/24子网的ICMP数据包的访问控制列表,Cisco路由器的正确配置是

选项 A、access-list 198 permit icmp 166.129.130.0 255.255.255.0 any  access-list 198 deny icmp any any  access-list 198 permit ip any any
B、access-list 198 permit icmp 166.129.130.0 0.0.0.255 any  access-list 198 deny icmp any any  access-list 198 permit ip any any
C、access-list 99 permit icmp 166.129.130:0 0.0.0.255 any  access-list 99 deny icnip any any  access-list 99 permit ip any any
D、access-list 100 permit icmp 166.129.130.0 0.0.0.255 any  access-list 100 permit ip any any  access-list 100 deny icmp any any

答案B

解析
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