The aim of this assignment is to write a program that simulates a small collection of computers on a Lan sending messages to another small collection of computers on another Lan. There is a Wan connection between each Lan. This introduces the concepts involved in simulating a simple Lan-Wan-Lan connection where multiple messages are being sent over a Wan connection involving a simple multiplexed Wan backbone. The implemented flow control is to be stop and wait per message per machine and the Wan backbone is to implement 2 forward channels (one fast and the other slow) with a third channel providing a constant (fast) return of acknowledgements

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