Computer Networks · Question 29 · Hard
Computer Networks question 29
A TCP connection starts with cwnd = 1 MSS and ssthresh = 16 MSS. Assume no losses, slow start doubles cwnd every RTT until it reaches ssthresh, and congestion avoidance then adds 1 MSS per RTT. What is cwnd after 6 RTTs?
- 64 MSS
- 18 MSS
- 32 MSS
- 17 MSS
Answer and explanation
Answer: B. 18 MSS
Explanation: Slow start: 1 → 2 → 4 → 8 → 16 after 4 RTTs, reaching ssthresh. Congestion avoidance: 17 after the 5th RTT and 18 after the 6th.
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