1. What is Optical Fiber? Explain the process of optical fiber.
2. What is Switch? Explain different types of switching methods.
3. What is circuit switching? Give the representation of delay in circuit switching also.
4. What are datagram networks?
5. What are the relationship b/w circuit, packet and virtual switching networks.
6. What is ISDN? What is the difference between PRI and BRI?
7. What are random access protocols? Describe with figure.
8. What are contention systems? What the term Contention refers.
9. What are multiple access protocols? Describe in detail.
10. Describe different types of channel allocation method.
11. Define ALOHA protocol. Compare the performance of pure v/s slotted aloha?
12. A pure aloha network transmits 200 bit frame on a shared channel of 200kbps. What is the requirement to make this frame collision free.
13. The stations on a wireless ALOHA network is a maximum of 600km apart. If we assume that signal propagate at 2*10pow.8 m/s. Then calculate back-off time for k=1, 2, 3.
14. Describe different types of persistent methods used in CSMA.
15. Describe the process of CSMA/CA.
16. Write a short note on IEEE standards.
17. Describe the frame format of FDDI protocol.
18. Show the following bit pattern using Manchester and Differential Manchester Encoding scheme.

a)1000101010101110101

b)11101101010101