Looking at the figure, answer the following questions about triple ACKs, time-outs, threshhold numbers, and the congestion window size:

Computer Networking: A Top-Down Approach (7th Edition)
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Author:James Kurose, Keith Ross
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Chapter1: Computer Networks And The Internet
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Looking at the figure, answer the following questions about triple ACKs, time-outs, threshhold numbers, and the congestion window size:

45-
40
35-
30
25
20
15
10-
5
0 2 4 6
8
10 12 14 16 18 20 22 24 26
Transmission round
Congestion vwindow size (segments)
Transcribed Image Text:45- 40 35- 30 25 20 15 10- 5 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Transmission round Congestion vwindow size (segments)
a. Identify the intervals of time when TCP slow start is operating.
b. Identify the intervals of time when TCP congestion avoidance is operating.
c. After the 16th transmission round, is segment loss detected by a triple
duplicate ACK or by a timeout?
d. After the 22nd transmission round, is segment loss detected by a triple
duplicate ACK or by a timeout?
e. What is the initial value of Threshold at the first transmission round?
f. What is the value of Threshold at the 18th transmission round?
g. What is the value of Threshold at the 24th transmission round?
h. During what transmission round is the 70th segment sent?
i. Assuming a packet loss is detected after the 26th round by the receipt of a
triple duplicate ACK, what will be the values of the congestion-window
size and of Threshold?
Transcribed Image Text:a. Identify the intervals of time when TCP slow start is operating. b. Identify the intervals of time when TCP congestion avoidance is operating. c. After the 16th transmission round, is segment loss detected by a triple duplicate ACK or by a timeout? d. After the 22nd transmission round, is segment loss detected by a triple duplicate ACK or by a timeout? e. What is the initial value of Threshold at the first transmission round? f. What is the value of Threshold at the 18th transmission round? g. What is the value of Threshold at the 24th transmission round? h. During what transmission round is the 70th segment sent? i. Assuming a packet loss is detected after the 26th round by the receipt of a triple duplicate ACK, what will be the values of the congestion-window size and of Threshold?
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