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    Computing TCP's RTT and timeout values

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    Suppose that TCP's current estimated values for the round trip time (estimatedRTT) and deviation in the RTT (DevRTT) are 350 msec and 40 msec, respectively. Suppose that the next three measured values of the RTT are 220, 240, and 240 respectively.

    Compute TCP's new value of estimatedRTT, DevRTT, and the TCP timeout value after each of these three measured RTT values is obtained. Use the values of α = 0.125 and β = 0.25

    © BrainMass Inc. brainmass.com October 10, 2019, 7:54 am ad1c9bdddf
    https://brainmass.com/computer-science/computer-communication-networks/computing-tcps-rtt-timeout-values-599744

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    Solution:

    After the first RTT values is obtained:

    estimatedRTT = 0.875*350 + 0.125*220 = 333.75 msecs
    DevRTT = 0.75*40 + 0.25*(abs(220 - 333.75)) = 58.4375 msecs
    TCP ...

    Solution Summary

    The solution gives detailed steps on computing TCP's new value of estimatedRTT, DevRTT, and the TCP timeout value after each of three measured RTT values is obtained.

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