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全部科目 > 软件认证工程师考试 > 思科认证考试 > CCNP系列认证 > CCNP(642-902)

单项选择题

Which of the following is true about an OSPF area border router (ABR)?()

    A. The ABR must have multiple interfaces connected to the backbone areA
    B. An ABR is a router with two interfaces, each connected to a different nonbackbone areA
    C. The only requirement to be considered an  ABR is at least one interface connected to the backbone areA
    D. An ABR must have at least one interface in the backbone area plus at least one other interface in a nonbackbone areA

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