45 35 30 25 20 12 16 18 20 26 Transmission round Assuming TCP Reno is the protoc

Question

45 35 30 25 20 12 16 18 20 26 Transmission round 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. a) (4 pts) Explain why the horizontal axis did not start from0 b) (1 pt) Identify the intervals of time when TCP is in slow start phase. c) (1 pt) Identify the intervals of time when TCP congestion avoidance is operating d) (1 pt) After the 16th transmission round (RTT) is segment loss detected by a triple duplicate ACK or by a timeout? e) (1 pts) After the 22nd transmission round, is segment loss detected by a triple duplicate ACK or by a timeout? f) (1pt) What is the initial value of Threshold at the first transmission round? g) (1 pt) What is the value of Threshold at the 19th transmission round? h) (1 pt) What is the value of Threshold at the 25th transmission round? i) (2 pts) Assuming a packet loss is detected after the 27th round by the receipt of a triple duplicate ACK, what will be the values of the congestion window size and the Threshold? j) (15 pts) Plot the cumulative number of segments as a function of RTT transmission round; up to the 26th round k) (2 pts) During what transmission round is the 75th segment sent? 1) (10 pts) Assuming the maximum segment size as 2KBytes plot the cumulative number of bytes as a function of RTT transmission round; up to the 26th round. Hint: Repeat part j) but instead of segments show the number of bytes.

Explanation / Answer

Answer B.

Intervals of time when TCP is in slow start phase is [1,6] and [23,26].

Answer C:

TCP congestion avoidance is operating is [6,16] and [17,22].

Answer D:

After the 16th transmission round[RTT] packet loss detected by the triple duplicate

ACK. In case of a timeout, the congestion window size would have dropped to 1.

Answer E:

AFter 22nd transmission round segment loss is detected due to timeout and hence the

congestion window size is set to 1.

Related Questions

Navigate

• Browse (All)
• Browse 4
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.