Questions:

1. What is a parity bit?

2. What is the CRC?

3. Does CRC detect more errors than a parity bit? Why or Why not?

4. A world wide web server typically receives small messages from clients but sends very large messages back to           them. What type of ARQ protocol would be best suited?

5. Why is multiplexing so cost effective?

6. Give a practical example of where each type of multiplexing makes sense to use.

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