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A TCP sender begins slow start with cwnd = 1 MSS and ssthresh = 16 MSS. Assuming no losses and that each RTT acknowledges the whole window,…

1329Medium DSSSB TGT Computer Science 0 replies

A TCP sender begins slow start with cwnd = 1 MSS and ssthresh = 16 MSS. Assuming no losses and that each RTT acknowledges the whole window, the congestion window after 7 RTTs is (in MSS)

  • A18
  • B19
  • C20
  • D128
Correct answer: B

Explanation

cwnd doubles each RTT (1, 2, 4, 8, 16) until it reaches ssthresh after 4 RTTs, then grows by 1 MSS per RTT: 17, 18, 19.
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