小小風 發問時間: 教育與參考考試 · 2 0 年前

關於CCNA中,ACL的問題?

When are packets processed in an inbound access list?

A. Before they are routed to an outbound interface.

B. After they are routed for outbound traffic.

C. After they are routed to an outbound interface while queuing.

D. Before and after they are routed to an outbound interface.

E. Depends on the configuration of the interface

F. None of the above

可否說明一下,答案是哪一個? 為什麼呢?

1 個解答

評分
  • 匿名使用者
    2 0 年前
    最佳解答

    Answer: A

    Explanation:

    When a packet is received on an interface with an inbound access list configured, the packets are matched

    against the access list to determine if they should be permitted or denied.After this check, the packets are

    processed by the routing function.The access list check is always done first.

    Incorrect Answers:

    B, C.The packets are always processed by the inbound access list prior to being routed.

    D.All packets are always checked against a specific access list only once.While packets traversing through a

    router may be checked against different access lists for each interface and in each direction (inbound and

    outbound), each access list is always only consulted once.

    2005-09-04 20:34:02 補充:

    我有買CCNA的講義~這是裡面的標準答案沒錯~我也正要考CCNA

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