(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 ssthresh at the first transmission round? (f) What is the value of ssthresh at the 18th transmission round? (g) What is the value of ssthresh 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 ssthresh?

(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 ssthresh at the first transmission round? (f) What is the value of ssthresh at the 18th transmission round? (g) What is the value of ssthresh 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 ssthresh?

A+ Guide To It Technical Support

10th Edition

ISBN:9780357108291

Author:ANDREWS, Jean.

Publisher:ANDREWS, Jean.

Chapter8: Network Infrastructure And Troubleshooting

Section: Chapter Questions

Problem 8TC

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Consider a TCP connection with congestion window size 40 KB, maximum segment size is 2 KB, if time taken by TCP connection to get 37 KB congestion window is 351 ms, round trip time of the connection is __(ms).
Question 4: Consider the figure below in which a TCP sender and receiver communicate over a connection in which the sender->receiver segments may be lost. The TCP sender sends an initial window of 4 segments. Suppose the initial value of the sender->receiver sequence number is 191 and the first 4 segments each contain 250 bytes. The delay between the sender and receiver is 7 time units, and so the first segment arrives at the receiver at t=8. As shown in the figure below, 0 of the 4 segment(s) are lost between the segment and receiver. TCP sender t=1 1=2 t=3 t=4 TCP segment TCP segment TCP segment TCP segment TCP receiver t-B t=9 t=10 t=11 a) Give the sequence numbers associated with each of the 4 segments sent by the sender. Format your answer as mentioned below Sequenc number for segment 1= 191 Sequenc number for segment 2= Sequenc number for segment 3= Sequenc number for segment 4- ACK number for segment 1= ACK number for segment 2= ACK number for segment 3= ACK number for segment…
Suppose that a TCP source uses a=0.2 and b=0.25. Further assume that this TCP source has just received three ACKs for which it calculated the following SampleRTT values: 24ms, 31ms, 28ms. What are the latest EstimatedRTT and DevRTT values at this TCP source? Assume that the starting values of EstimatedRTT and DevRTT are 30ms and 3ms, respectively. Also, what is the latest TimeOutInterval at this TCP source? Two-digit precision is sufficient in your calculations.
Consider Figure 3.58 . Assuming TCP Reno is the protocol experiencing the behavior shown above, answer the following questions. In all cases, you should provide a short discussion justifying your answer.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 ssthresh at the first transmission round? f. What is the value of ssthresh at the 18th transmission round?
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TCP congestion control example. Consider the figure below, where a TCP sender sends 8 TCP segments at t = 1, 2, 3, 4, 5, 6, 7, 8. Suppose the initial value of the sequence number is 0 and every segment sent to the receiver each contains 100 bytes. The delay between the sender and receiver is 5 time units, and so the first segment arrives at the receiver at t = 6. The ACKs sent by the receiver at t = 6, 7, 8, 10, 11, 12 are shown. The TCP segments (if any) sent by the sender at t = 11, 13, 15, 16, 17, 18 are not shown. The segment sent at t=4 is lost, as is the ACK segment sent at t=7. TCP sender t=1 T t=2 t=3 t=4+ t=5- t=6+ t=11 t=12 t=13 t=14 t=15 t=16 t=17 t=18 I data segment data segment data segment data segment data segment data segment data segment data segment ACK ACK ACK ACK ACK ACK Ty A A V V htt TCP receiver t=6 t=7 t=8 t=9 t=10 t=11 t=12 t=13 What does the sender do at t=17? You can assume for this question that no timeouts have occurred.
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