COMPUTER COMMUNICATION NETWORKS (CCN), B.E. Electronics & Telecommunication, Semester 7, May 2012.

COMPUTER COMMUNICATION NETWORKS (CCN),

B.E. Electronics & Telecommunication,

Semester 7, May 2012.

Con. 4504-12

GN- 8501

(3 Hours)

[Total Mark: 100]

N.B. (1) Question No 1 is compulsory.

(2) Attempt any four questions out of remaining six questions.

(3) Marks are indicated by figures on right.

1. (a) Discuss the various network topologies along with the advantages and disadvantages of each. ---- (8 Marks)

(b) Explain the ISO- OSI network model and discus the functions of each layer. ---- (12 Marks)

2. (a) Explain the Go – back – n and selective reject techniques of sliding window ARQ. ---- (10 Marks)

(b) List the various networking and internetworking devices and explain their working in detail. ---- (10 Marks)

3. (a) Discuss the various configurations, modes and frame types of HDLC in detail. ----(10 Marks)

(b) Compare circuit switching, packet switching and message switching. --- (10 Marks)

4. (a) Explain distance vector routing in detail. --- (10 Marks)

(b) Draw an IP datagram header and explain the function of every field. ---- (10 Marks)

5. (a) What IP fragmentation? Why is it needed? Explain with an example. ----(10 Marks)

(b) Compare TCP and UDP.---- (10 Marks)

6. (a) Explain the M/M/I model of queuing theory. --- (10 Marks)

(b) Explain the ARP and RARP protocols in detail. ---- (10 Marks)

7. Write short notes on any two: --- (20 Marks)

(a) IEEE standards

(b) Dijkstra’s algorithm

(c) Classful addressing