NALANDA OPEN UNIVERSITY QUESTION, 2016, M.C.A, Part-I, Paper-IX (Data Communication and Computer Networks)

NALANDA OPEN UNIVERSITY QUESTION, 2016, M.C.A, Part-I, Paper-IX (Data Communication and Computer Networks)

                                                                            2016

                                                                    Time: 3 hours

                                                                    Full marks: 80

                                      Answer any five questions.All questions carry equal marks.

1. Differentiate between 'Client/Server' and 'Peer to Peer' architecture. Draw the diagrams for both the architectures.

2. What is the purpose of PCM? Explain the different components of PCM encoder. How are quantization levels chosen in PCM?

3. Describe the protocols of Data Link Layer. Data link protocol almost puts CRC in trailer rather than in a header. Why?

4. Explain token bucket algorithm and compare its perfomance against the leaky bucket algorithm. Describe the layer of OSI model which is responsible for these algorithms.

5. Explain the operation of congestion control algorithm in TCP and the operation of Reverse path forwarding algorithm.

6. Discuss how the message is transmitted in telephone networks. Compare and contrast circuit switching, packet switching and message switching.

7. Explain the difference between OSI model and TCP/IP model by comparing each layers of both the models.

8. Discuss the process of link state routing. Explain how it overcome the problem of Count-to-infinity for distance vector routing.

9. Illustrate congestion detection and congestion avoidance phases in TCP. Draw TCP Header format and explain the use of TCP header fields.

10. Write short notes on the following :-
     (a) Class in IP
     (b) Nagle's algorithm
     (c) IEEE 802.11
     (d) OSPE