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Figure1 shows the evolution of TCP's congestion window at the beginning of each time unit (where the unit of time is equal to the RTT). In this problem, you are asked to reconstruct the sequence of events (ACKS, losses) that resulted in the evolution of TCP's cwnd shown in figure1. The in itial value of cwnd is 1 and the initial value of slow start threshold ssthresh (shown as a red +) is 8.

Figure1 shows the evolution of TCP's congestion window at the beginning of each time unit (where the unit of time is equal to the RTT). In this problem, you are asked to reconstruct the sequence of events (ACKS, losses) that resulted in the evolution of TCP's cwnd shown in figure1. The in itial value of cwnd is 1 and the initial value of slow start threshold ssthresh (shown as a red +) is 8.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Problem 1 Figure1 shows the evolution of TCP's congestion window at the beginning of each time unit (where the unit of time is equal to the RTT). In this problem, you are asked to reconstruct the sequence of events (ACKS, losses) that resulted in evolution of TCP's cwnd shown in figure1. The initial value of cwnd is 1 and the initial value of slow start threshold ssthresh (shown as a red +) is 8. 45 40 35 30 25 15 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 ào Time unit (in RTT) Figure 1: TCP Congestion Window Vs. RTT Congestion window size (in segments) 20
Transcribed Image Text:Problem 1 Figure1 shows the evolution of TCP's congestion window at the beginning of each time unit (where the unit of time is equal to the RTT). In this problem, you are asked to reconstruct the sequence of events (ACKS, losses) that resulted in evolution of TCP's cwnd shown in figure1. The initial value of cwnd is 1 and the initial value of slow start threshold ssthresh (shown as a red +) is 8. 45 40 35 30 25 15 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 ào Time unit (in RTT) Figure 1: TCP Congestion Window Vs. RTT Congestion window size (in segments) 20
1. Give the times at which TCP is in slow start. 2. Give the times at which TCP is in congestion avoidance. 3. Give the times at which TCP is fast recovery. 4. Give the times at which packets are lost via timeout. 5. Give the times at which the value of ssthresh changes.
Transcribed Image Text:1. Give the times at which TCP is in slow start. 2. Give the times at which TCP is in congestion avoidance. 3. Give the times at which TCP is fast recovery. 4. Give the times at which packets are lost via timeout. 5. Give the times at which the value of ssthresh changes.
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