Answered: Figure has been attached A) List down…

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

Figure has been attached

A) List down the functionality of each layer of a OSI model.( Do not write book type documents.
only list the responsible functions. For instance: Data link layer: 1. Framing, 2. Error control,
3…… etc.)
B) According to the given figure, assume that, PC0 wants to send a message to PC4. If the distance
between the two points is 22,000 km, 3.2-kbyte message sends in 2.4 x 100000000 mls speed
through cable and the transmission link has 1.5 Gbps Bandwidth. When the message arrives at
Routers ,
a) Router0 already has 4 packets to process in the queue and each will need 2ms.
b) Router1 has no packets in the queue, but if it had then would require 3ms to process.
c) Router2 already has 5 packets to process in the queue and each will need 1ms.
Calculate the total time to send the message from PC0 to PC4