need these questions bellow to be answered ..

1. What are the network applications? Give two examples.

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2. What is packet switching, and why is packet switching relevant to the Internet?

3. Describe types of interferences in UTP and how to mitigate them.

4. Describe multi-mode and single-mode fiber and their limitations.

5. Describe the difference between serial and parallel transmission.

6. Which type (or types) of serial transmission is appropriate for video transmission? Which type of transmission is appropriate for a keyboard connection to a computer?

7. What are the four basic LAN topologies?

8. Define unicast, multicast, and broadcast addresses.

9. Why is byte stuffing needed?

10. Name three primary techniques that modulate electromagnetic carrier.