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

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20 kb
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2,4,8,14,16,18  so Ans=18
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When a timeout occurs, three things happend. First, slow start will be initiated. Second, the congestion window would start at 1. Third, the threshold will be reset to 28KB/2=14KB. If the next four transmission are all successful, then

  • 1st transmission: 1 segment, 2KB
  • 2nd transmission: 2 segments, 4KB
  • 3rd transmission: 4 segments, 8KB
  • 4th transmission: 8 segments, 16KB
  • 5th transmission: 16 segments, 32KB
  • 6th transmission: 32 segments, 64KB

After these six successful transmissions, the window size is supposed to be 64. However, since the threshold is 14KB, the window size can only be 14 KB.

–1 votes
–1 votes
Anwer shold be 14KB
Answer:

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