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

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

Principles of Information Security (MindTap Course List)

6th Edition

ISBN:9781337102063

Author:Michael E. Whitman, Herbert J. Mattord

Publisher:Michael E. Whitman, Herbert J. Mattord

Chapter6: Security Technology: Access Controls, Firewalls, And Vpns

Section: Chapter Questions

Problem 2RQ

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Consider the following plot below of TCP window size as a function of time. Assuming TCP Reno is the protocol experiencing the behaviour shown above, answer the following questions. In all cases, you should provide a short discussion justifying your answer.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 lost is detected after the 26th round by the receipt of a triple duplicate ACK, what will be the values…
Below are the two questions, so make sure to answer each part carefully: Why does TCP implement congestion control if it already has flow control to manage the sender's window? Consider our recent reading [Chiu+89] Analysis of the Increase and Decrease algorithms for congestion avoidance in computer networks. How does this article showcases that TCP is fair?
Below are the two questions, so make sure to answer each part carefully and label the response for each question: 1) Why does TCP implement congestion control if it already has flow control to manage the sender's window? 2) Consider our recent reading [Chiu+89] Analysis of the Increase and Decrease algorithms for congestion avoidance in computer networks. How does this article showcases that TCP is fair?
The following event is shown to occur in the figure below illustrating the operation of TCP Reno. For the following prompt, clearly state where it occurs and how we can identify where this event occurs based on the shape of the graph or changes to the congestion window size. a.) A segment loss event due to a timeout.
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