Question: 1 . Define data. 2 . Define signal. 3 . Why is there a need to convert data to signals? 4 . What are the

1. Define data.
2. Define signal.
3. Why is there a need to convert data to signals?
4. What are the properties of a good signal?
5. What is modulation?
6. How does modulation help in data transmission?
7. What is amplitude modulation?
8. How does noise affect signals?
9. Why is binary representation preferred in computers?
10. Briefly describe the standard procedure used by the physical layer to send and receive data as a signal.
11. Why is ASCII code useful in data communication?
12. Why is multiplexing useful in data communication?
13. What are some examples of multiplexing in day-to-day life?
14. What are the two categories of multiplexing?

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