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Write answer to each question – two paragraphs for each question with single spaces.

Format : Single Spaced Strong Paragraphs
Two paragraphs for each question
Times New Roman – 12
subject: Data Communication and Network Security


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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