Question 17: The following figure shows the TCP congestion window size as a function of time. Assume that the TCP implementation supports fast retransmit/ fast recovery. Answer the following questions: 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 round 16, is segment loss detected by duplicate ACKS or by a timeout? D. After the round 22, is segment loss detected by duplicate ACKS or by a timeout? E. What is the initial threshold for the first transmission round? F. What is the threshold at the 18th transmission round? G. What is the threshold at the 24th transmission round? H. During what transmission round is the 70th segment sent? 45 40 35 30 25 Congestion Window 20

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Answer only part G,H. Other parts are already answered. 

Solve it , only if you are good in computer networking. Otherwise i will downvote.

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Question 17: The following figure shows the TCP congestion window size as a function
of time. Assume that the TCP implementation supports fast retransmit / fast
recovery. Answer the following questions:
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 round 16, is segment loss detected by duplicate ACKS or by a
timeout?
D. After the round 22, is segment loss detected by duplicate ACKS or by a
timeout?
E. What is the initial threshold for the first transmission round?
F. What is the threshold at the 18th transmission round?
G. What is the threshold at the 24th transmission round?
H. During what transmission round is the 70th segment sent?
45
40
35
30
25
Congestion Window
20
15
10
10
15
0.
25
30
Time
20
Transcribed Image Text:Question 17: The following figure shows the TCP congestion window size as a function of time. Assume that the TCP implementation supports fast retransmit / fast recovery. Answer the following questions: 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 round 16, is segment loss detected by duplicate ACKS or by a timeout? D. After the round 22, is segment loss detected by duplicate ACKS or by a timeout? E. What is the initial threshold for the first transmission round? F. What is the threshold at the 18th transmission round? G. What is the threshold at the 24th transmission round? H. During what transmission round is the 70th segment sent? 45 40 35 30 25 Congestion Window 20 15 10 10 15 0. 25 30 Time 20
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