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    Question

    What type of acknowledgement system is used in 802.5?

    A Cumulative ACK Correct Answer Incorrect Answer
    B Independent ACK Correct Answer Incorrect Answer
    C Piggybacking ACK Correct Answer Incorrect Answer
    D Both 1 and 3 Correct Answer Incorrect Answer
    E None Correct Answer Incorrect Answer

    Solution

    the two bits are contained in the data frame, so we can say that piggybacked acknowledgements are used in token ring.  

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