Computer networking exercises

Discussion in 'General Networking Discussion' started by abbasi, Sep 24, 2014.

  1. abbasi

    abbasi

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    Hello all,

    I'm reading computer networking a to-down approach 6th edition book.
    The exercise no 13 of chapter one says:

    P13. (a) Suppose N packets arrive simultaneously to a link at which no packets are currently being transmitted or queued. Each packet is of length L and the link has transmission rate R. What is the average queuing delay for the N packets?

    (b) Now suppose that N such packets arrive to the link every LN/R seconds. What is the average queuing delay of a packet?

    I've obtained these for (a) and (b):

    (a): (N-1)/2 L/R sec.
    (b): For nth LN/R: [n(N-1)-2(n-1)]/2 L/R sec.

    1- Are these answers correct?
    2- Is here a correct place for posting such problems?
     
    abbasi, Sep 24, 2014
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