Consider sending a large file from a host to another over a TCP connection that has no loss. Suppose TCP uses AIMD for its congestion control without slow start. Assuming cwnd increases by 1 MSS every time a batch of ACKs is received and assuming approximately constant round-trip times, how long does it take for cwnd increase from 6 MSS to 12 MSS (assuming no loss events)

Question

Maren Wolf

Computers & Technology

29 October, 13:24

Consider sending a large file from a host to another over a TCP connection that has no loss. Suppose TCP uses AIMD for its congestion control without slow start. Assuming cwnd increases by 1 MSS every time a batch of ACKs is received and assuming approximately constant round-trip times, how long does it take for cwnd increase from 6 MSS to 12 MSS (assuming no loss events)

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Answers (1)

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Chaya Martin · Answer 1

It will take 6RTTs.

Explanation:

1 RTT is required to go from 6 MSS to 7 MSS and 1 RTT is reuired to go from 7 MSS to 8 MSS and so on. So, in total 6RTTs are required.