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6. ARQ protocols [10] Two computers communicate using the Stop-and-Wait ARQ protocol. The maximum transmission rate is 1Gbps and the one way propagation delay is

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6. ARQ protocols [10] Two computers communicate using the Stop-and-Wait ARQ protocol. The maximum transmission rate is 1Gbps and the one way propagation delay is 5ms. The data frame size is 1250 bytes (1 byte = 8 bits), and the header overhead and ACK frame are 25 bytes. Assume processing delay is negligible. (a) Find the efficiency of Stop-and-Wait ARQ, assuming an ideal channel with no error. (Give the detail derivation steps.) [5] (b) Find the efficiency of Stop-and-Wait ARQ, assuming the bit error rate is 10-4. (Formulas: A=0 x= b for [x]

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