COMPUTER COMMUNICATION NETWORKS (CCN), B.E. Electronics & Telecommunication, Semester 7, May 2008.

COMPUTER COMMUNICATION NETWORKS (CCN),

B.E. Electronics & Telecommunication,

Semester 7, May 2008.

Con. 2976-08

CO- 4225

(REVISED COURSE)

(3 Hours)

[Total Mark: 100]

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

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

1. (a) Compare OSI model and TCP/IP model. ----- (5 Marks)

(b) Explain HDLC data link control. ----- (5 Marks)

(c) What is the difference between Network layer delivery and transport layer delivery? ---- (5 Marks)

(d) Explain packet switching in brief. ---- (5 Marks)

2. (a) Explain performance issues in ARQ.--- (10 Marks)

(b) Draw the layered OSI Network architecture. Explain the functions of each layer and show the path of actual and vertual communication between the layers. ---- (10 Marks)

3. (a) Explain the SONET multiplexing and SONET frame structure. ---- (10 Marks)

(b) What is the mechanism of sliding window flow control? ----- (10 Marks)

4. (a) Differentiate UDP and TCP. ---- (10 Marks)

(b) Show that the maximum through put of pure ALOHA is 1/2e. ---- (10 Marks)

5. (a) Explain the various transmission media in detail. ---- (10 Marks)

(b) Explain the spanning tree algorithm with reference to frame forwarding, address learning and loop resolution. ---- (10 Marks)

6. (a) Explain Dijkstra's shortest path algorithm using graph. --- (10 Marks)

(b) With the help of block diagram explain ATM protocol architecture. ----- (10 Marks)

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

(a) IPv4 and IPv6

(b) Hubs, Bridges and Switches

(c) FDDI

(d) ATM traffic management.