Subject

    Computer Science

    Topic

    Computer Hardware

    A leased-line modem shows “no carrier detect.” The problem is most likely:

    a)
    In the modem
    b)
    In the phone line/circuit
    c)
    In the computer
    d)
    In the DTE equipment

    Explanation

    CD reflects line presence from the far end. On a healthy modem and PC, a missing carrier points to the telco/line.

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