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1. Users share an 8 Mbps link. Each user requires 200 kbps when transmitting but transmits only 10% of the time. (1) How many users can be supported with circuit switching? (2) For the remaining problems, assume packet switching is used. Find the probability that a selected user is transmitting. (3) If there are 200 users, find the probability that n users are transmitting at any given time. (4) Find the probability that 30 or more users are transmitting simultaneously. 2. Consider a GBN protocol with a sender window size of 5 and a sequence number of 1024. At time t, the next expected sequence packet by the receiver has sequence number k. Assuming the transmission medium does not reorder messages, answer the following: (1) What are the possible sequence numbers in the sender window at time t? Provide reasoning. (2) At time t, what are all the possible ACK field values in the messages currently being sent by the sender?

1. Users share an 8 Mbps link. Each user requires 200 kbps when transmitting but transmits only 10% of the time. (1) How many users can be supported with circuit switching? (2) For the remaining problems, assume packet switching is used. Find the probability that a selected user is transmitting. (3) If there are 200 users, find the probability that n users are transmitting at any given time. (4) Find the probability that 30 or more users are transmitting simultaneously. 2. Consider a GBN protocol with a sender window size of 5 and a sequence number of 1024. At time t, the next expected sequence packet by the receiver has sequence number k. Assuming the transmission medium does not reorder messages, answer the following: (1) What are the possible sequence numbers in the sender window at time t? Provide reasoning. (2) At time t, what are all the possible ACK field values in the messages currently being sent by the sender?

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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1. Users share an 8 Mbps link. Each user requires 200 kbps when transmitting but transmits only 10% of the time. (1) How many users can be supported with circuit switching? (2) For the remaining problems, assume packet switching is used. Find the probability that a selected user is transmitting. (3) If there are 200 users, find the probability that n users are transmitting at any given time. (4) Find the probability that 30 or more users are transmitting simultaneously. 2. Consider a GBN protocol with a sender window size of 5 and a sequence number of 1024. At time t, the next expected sequence packet by the receiver has sequence number k. Assuming the transmission medium does not reorder messages, answer the following: (1) What are the possible sequence numbers in the sender window at time t? Provide reasoning. (2) At time t, what are all the possible ACK field values in the messages currently being sent by the sender?
Transcribed Image Text:1. Users share an 8 Mbps link. Each user requires 200 kbps when transmitting but transmits only 10% of the time. (1) How many users can be supported with circuit switching? (2) For the remaining problems, assume packet switching is used. Find the probability that a selected user is transmitting. (3) If there are 200 users, find the probability that n users are transmitting at any given time. (4) Find the probability that 30 or more users are transmitting simultaneously. 2. Consider a GBN protocol with a sender window size of 5 and a sequence number of 1024. At time t, the next expected sequence packet by the receiver has sequence number k. Assuming the transmission medium does not reorder messages, answer the following: (1) What are the possible sequence numbers in the sender window at time t? Provide reasoning. (2) At time t, what are all the possible ACK field values in the messages currently being sent by the sender?
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