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全部科目 > 软件认证工程师考试 > 思科认证考试 > CCNA系列认证 > CCNA(640-801)

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Part of the configuration files for routers testking1 and testking2 are displayed below:
If you were to enter the "show interface serial 0" command on router testking1,which of the following will be displayed?()

    A. Serial 0 is down, line protocol is down
    B. Serial 0 is up, line protocol is up
    C. Open: IPCP, CDPCP
    D. LCP closed
    E. LCP open

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