Computer Networks 2076 (old)

Group A

Long Answer Questions:

Attempt all questions.                                                                                        (2x10=20)

1. Why do we need layered protocol architecture? Discuss each layer of TCP/IP architecture along with function of each layer. Compare TCP/IP with OSI model.

                                                        ^OR

Assume a class B network. Divide this network in 16 different sub-networks. What is new subnet mask?

2. Define multiplexing. What are the benefits of using multiplexing? Discuss Go-Back-N and Selective Repeat protocol in detail.

Group B

Short answer Questions:

Attempt any eight questions.                                                                                         (5x8=40)

3. What is circuit-switching? How it is different from packet switching?

4. Discuss different services provided by DNS.

5. What are the causes of congestion? Discuss leaky bucket algorithm.

6. Discuss different fields of UDP. How is it different from TCP?

7. What is static routing? How is it different from dynamic routing?

8. What is random access protocol? Discuss ALOHA in detail.

9. Discuss HTTP video streaming in detail.

10. What is network management ? Discuss different areas of network management.

11. Write short notes on:

                a. Multicasting routing

                b. Point-to-point protocol