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(e) In the context of TCP, (i) Explain the importance of the retransmission timer in TCP (ii) What is the retransmission ambiguity problem? How does

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(e) In the context of TCP, (i) Explain the importance of the retransmission timer in TCP (ii) What is the retransmission ambiguity problem? How does Karns algorithm solve the problem? (iii) Compare the simple average and the exponential average methods for estimating the round-trip time. (iv) Describe how the timeout value is computed. Explain why the Round Trip Time (RTT) might exhibit high variance. (10 Marks

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