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Exercise 2. [Delay estimation] Adapt from Kurose 7th edition, chapter 1 problem P10,P11. Consider a packet of length L that begins at end system A and travels over three links to a destination end system. These three links are connected by two packet switches. Let d;, s;, and R; denote the length, propagation speed, and the transmission rate of link i, for i=1,2,3. The packet switch delays each packet by dproc. Assuming no queuing delays, in terms of d;, si, and R;, (i=1,2,3), and L. 1. What is the total end-to-end delay for the packet? 2. Suppose now the packet is 2,500 bytes, the propagation speed on all three links is 2.5 * 10°m/s, the transmission rates of all three links are 2 Mbps, the packet switch processing delay is 4 msec, the length of the first link is 3,000 km, the length of the second link is 2,000 km, and the length of the last link is 1,000 km. For these values, what is the end-to-end delay? 3. In the above problem, suppose R1 = R2 = R3 = R and dproc = 0. Further suppose the packet switch does not store-and-forward packets but instead immediately transmits each bit it receives before %3D waiting for the entire packet to arrive. What is the end-to-end delay?

Exercise 2. [Delay estimation] Adapt from Kurose 7th edition, chapter 1 problem P10,P11. Consider a packet of length L that begins at end system A and travels over three links to a destination end system. These three links are connected by two packet switches. Let d;, s;, and R; denote the length, propagation speed, and the transmission rate of link i, for i=1,2,3. The packet switch delays each packet by dproc. Assuming no queuing delays, in terms of d;, si, and R;, (i=1,2,3), and L. 1. What is the total end-to-end delay for the packet? 2. Suppose now the packet is 2,500 bytes, the propagation speed on all three links is 2.5 * 10°m/s, the transmission rates of all three links are 2 Mbps, the packet switch processing delay is 4 msec, the length of the first link is 3,000 km, the length of the second link is 2,000 km, and the length of the last link is 1,000 km. For these values, what is the end-to-end delay? 3. In the above problem, suppose R1 = R2 = R3 = R and dproc = 0. Further suppose the packet switch does not store-and-forward packets but instead immediately transmits each bit it receives before %3D waiting for the entire packet to arrive. What is the end-to-end delay?

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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Exercise 2. [Delay estimation] Adapt from Kurose 7th edition, chapter 1 problem P10,P11. Consider a packet of length L that begins at end system A and travels over three links to a destination end system. These three links are connected by two packet switches. Let d;, s;, and R; denote the length, propagation speed, and the transmission rate of link i, for i=1,2,3. The packet switch delays each packet by dproc. Assuming no queuing delays, in terms of d;, si, and Ri, (i=1,2,3), and L. 1. What is the total end-to-end delay for the packet? 2. Suppose now the packet is 2,500 bytes, the propagation speed on all three links is 2.5 * 10°m/s, the transmission rates of all three links are 2 Mbps, the packet switch processing delay is 4 msec, the length of the first link is 3,000 km, the length of the second link is 2,000 km, and the length of the last link is 1,000 km. For these values, what is the end-to-end delay? 3. In the above problem, suppose R1 = R2 = R3 = R and dproc = 0. Further suppose the packet switch does not store-and-forward packets but instead immediately transmits each bit it receives before waiting for the entire packet to arrive. What is the end-to-end delay?
Transcribed Image Text:Exercise 2. [Delay estimation] Adapt from Kurose 7th edition, chapter 1 problem P10,P11. Consider a packet of length L that begins at end system A and travels over three links to a destination end system. These three links are connected by two packet switches. Let d;, s;, and R; denote the length, propagation speed, and the transmission rate of link i, for i=1,2,3. The packet switch delays each packet by dproc. Assuming no queuing delays, in terms of d;, si, and Ri, (i=1,2,3), and L. 1. What is the total end-to-end delay for the packet? 2. Suppose now the packet is 2,500 bytes, the propagation speed on all three links is 2.5 * 10°m/s, the transmission rates of all three links are 2 Mbps, the packet switch processing delay is 4 msec, the length of the first link is 3,000 km, the length of the second link is 2,000 km, and the length of the last link is 1,000 km. For these values, what is the end-to-end delay? 3. In the above problem, suppose R1 = R2 = R3 = R and dproc = 0. Further suppose the packet switch does not store-and-forward packets but instead immediately transmits each bit it receives before waiting for the entire packet to arrive. What is the end-to-end delay?
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