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congestion control

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Suppose that TCP congestion window is set to 28KB and time-out occurs.The window size after the next six successful transmission bursts (Assume maximum segment size is 2KB and TCP uses congestion avoidance) is _______(in KB)

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If congestion is detected by time out error:

  1. Set threshold value to half of the current window size where congestion is detected. New threshold = 18/2 =14 KB
  2. start the slow-start phase. Hence new window size = 2 KB

next 6 bursts will be ==>> 2KB | 4KB | 8KB | (now threshold reaches so Additive increase starts) 10 KB  | 12 KB | 14 KB 

Answer will be 14 KB

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