Chapter 4, Problem 1E

Explanation of Solution

Series of four separate message flow from one computer to another computer diagram:

Consider the Stop and Wait Automatic Repeat Request (ARQ) approach while sending a message from one computer to another computer. For the given four different messages, the transmission is as follows:

Explanation:

Case 1: If a sender sends “Message 1” successfully to a receiver without any error, then the receiver confirms with the acknowledgment.

Case 2: “Message 2” was sent with an error to a receiver. The receiver checks and detects the error in the message and sends a Negative Acknowledgment (NACK) to the sender...