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    Question

    What is the acronym for

    ISDN? 
    A Integrated Security Digital Network Correct Answer Incorrect Answer
    B Integrated Security Data Network Correct Answer Incorrect Answer
    C Integrated Services Digital Network Correct Answer Incorrect Answer
    D Integrated Services Data Network Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ISDN stands for Integrated Services Digital Network. Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network. It was first defined in 1988 in the CCITT red book.

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