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Suppose you attach a network monitor to observe the sequence of frames that travel over a link from sender A to receiver B. The problem is to deduce what protocols, if any, could have generated the observed sequence. The following diagrams depict a flow of frames, with their corresponding sequence numbers, from the sender (A). There may be traffic from B to A, which is not depicted in the diagram. A gap between adjacent frames implies passage of time with no transmission from the sender. Note that the x-axis is time, and not space. Justify your answer. A A A A ● ● ● ● 1 5 ● 3 5 ● 0 0 0 1 1 1 1 0 5 0 c) For Diagram 3, the protocol is not: Stop-and-Wait Go-Back-N ● Selective Repeat Time Diagram 1 2 Time Diagram 2 Time a) For Diagram 1, the most likely protocol being used is: ● Stop-and-Wait Go-Back-N (if Go-Back-N, give the window size) Selective Repeat (if Selective Repeat, give the window size) 3 Diagram 3 1 Time b) For Diagram 2, the most likely protocol being used is: (Justify your answer) ● Stop-and-Wait Go-Back-N (if Go-Back-N, give the window size) Selective Repeat (if Selective Repeat, give the window size) 2 Diagram 4 (Justify your answer) (Justify your answer) d) For Diagram 4, the most likely protocol being used is: Stop-and-Wait Go-Back-N (if Go-Back-N, give the window size) Selective Repeat (if Selective Repeat give the window size) (Justify your answer)

Suppose you attach a network monitor to observe the sequence of frames that travel over a link from sender A to receiver B. The problem is to deduce what protocols, if any, could have generated the observed sequence. The following diagrams depict a flow of frames, with their corresponding sequence numbers, from the sender (A). There may be traffic from B to A, which is not depicted in the diagram. A gap between adjacent frames implies passage of time with no transmission from the sender. Note that the x-axis is time, and not space. Justify your answer. A A A A ● ● ● ● 1 5 ● 3 5 ● 0 0 0 1 1 1 1 0 5 0 c) For Diagram 3, the protocol is not: Stop-and-Wait Go-Back-N ● Selective Repeat Time Diagram 1 2 Time Diagram 2 Time a) For Diagram 1, the most likely protocol being used is: ● Stop-and-Wait Go-Back-N (if Go-Back-N, give the window size) Selective Repeat (if Selective Repeat, give the window size) 3 Diagram 3 1 Time b) For Diagram 2, the most likely protocol being used is: (Justify your answer) ● Stop-and-Wait Go-Back-N (if Go-Back-N, give the window size) Selective Repeat (if Selective Repeat, give the window size) 2 Diagram 4 (Justify your answer) (Justify your answer) d) For Diagram 4, the most likely protocol being used is: Stop-and-Wait Go-Back-N (if Go-Back-N, give the window size) Selective Repeat (if Selective Repeat give the window size) (Justify your answer)

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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Question 5: Suppose you attach a network monitor to observe the sequence of frames that travel over a link from sender A to receiver B. The problem is to deduce what protocols, if any, could have generated the observed sequence. The following diagrams depict a flow of frames, with their corresponding sequence numbers, from the sender (A). There may be traffic from B to A, which is not depicted in the diagram. A gap between adjacent frames implies passage of time with no transmission from the sender. Note that the x-axis is time, and not space. Justify your answer. A A A ● ● ● ● 1 5 ● 3 5 0 ● 0 0 1 1 1 ● Go-Back-N ● Selective Repeat 1 0 5 0 c) For Diagram 3, the protocol is not: Stop-and-Wait Time Diagram 1 2 Time a) For Diagram 1, the most likely protocol being used is: Stop-and-Wait ● Go-Back-N (if Go-Back-N, give the window size) Selective Repeat (if Selective Repeat, give the window size) Diagram 2 Time 3 Diagram 3 1 Time b) For Diagram 2, the most likely protocol being used is: (Justify your answer) Stop-and-Wait Go-Back-N (if Go-Back-N, give the window size) Selective Repeat (if Selective Repeat, give the window size) 2 Diagram 4 (Justify your answer) (Justify your answer) d) For Diagram 4, the most likely protocol being used is: Stop-and-Wait Go-Back-N (if Go-Back-N, give the window size) Selective Repeat (if Selective Repeat, give the window size) (Justify your answer)
Transcribed Image Text:Question 5: Suppose you attach a network monitor to observe the sequence of frames that travel over a link from sender A to receiver B. The problem is to deduce what protocols, if any, could have generated the observed sequence. The following diagrams depict a flow of frames, with their corresponding sequence numbers, from the sender (A). There may be traffic from B to A, which is not depicted in the diagram. A gap between adjacent frames implies passage of time with no transmission from the sender. Note that the x-axis is time, and not space. Justify your answer. A A A ● ● ● ● 1 5 ● 3 5 0 ● 0 0 1 1 1 ● Go-Back-N ● Selective Repeat 1 0 5 0 c) For Diagram 3, the protocol is not: Stop-and-Wait Time Diagram 1 2 Time a) For Diagram 1, the most likely protocol being used is: Stop-and-Wait ● Go-Back-N (if Go-Back-N, give the window size) Selective Repeat (if Selective Repeat, give the window size) Diagram 2 Time 3 Diagram 3 1 Time b) For Diagram 2, the most likely protocol being used is: (Justify your answer) Stop-and-Wait Go-Back-N (if Go-Back-N, give the window size) Selective Repeat (if Selective Repeat, give the window size) 2 Diagram 4 (Justify your answer) (Justify your answer) d) For Diagram 4, the most likely protocol being used is: Stop-and-Wait Go-Back-N (if Go-Back-N, give the window size) Selective Repeat (if Selective Repeat, give the window size) (Justify your answer)
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