下面ACL语句中,表达“禁止外网和内网之间互相ping”的是(  )。A.acc

练习题库2022-08-02  7

问题 下面ACL语句中,表达“禁止外网和内网之间互相ping”的是(  )。A.access-list 101 permit any anyB.access-list 101 permit icmp any anyC.access-list 101 deny any anyD.access-list 101 deny icmp any any

选项 A.access-list 101 permit any any
B.access-list 101 permit icmp any any
C.access-list 101 deny any any
D.access-list 101 deny icmp any any

答案 D

解析 “禁止外网和内网之间互相ping”这样的要求势必会用到扩展ACL,其表号为100~199。禁ping实际上是要阻止ICMP协议的流量,所以ACL语句:access-list 101 deny icmp any any可满足题干要求。
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