COMPUTER COMMUNICATION NETWORKS (CCN), B.E. Electronics & Telecommunication, Semester 7, December 2013.

COMPUTER COMMUNICATION NETWORKS (CCN),

B.E. Electronics & Telecommunication,

Semester 7, December 2013.

Con. 3651-13.

(REVISED COURSE)

LJ- 14258

(3 Hours)

[Total Mark: 100]

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

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

(3) Illustrate answers with sketches wherever required.

(4) Figures to the right indicate marks.

1. (a) Explain the difference between a data link layer delivery and a network layer delivery. --- (5 Marks)

(b) Differentiate between Circuit switching and Packet Switching. ---- (5 Marks)

(c) Why do you require a limit on the minimum size of Ethernet frame? ---- (5 Marks)

(d) Explain ALOHA and slotted ALOHA. ---- (5 Marks)

2. (a) What does the term error control mean in data link layer? With neat diagram explain Go back N and selective repeat AEQ protocols. Compare their merits and demerits. ----- (10 Marks)

(b) Explain OSI model and explain the process of data encapsulation in detail. ---- (10 Marks)

3. (a) Explain in detail HDLC protocol with all the frame types supported by HDLC. Differentiate between HDLC and PPP protocols. ---- (10 Marks)

(b) Discuss various scheduling medium access control techniques. ---- (10 Marks)

4. (a) What is exterior and interior routing? Explain in brief Distance vector routing and Link state routing. ---- (10 Marks)

(b) Write a note on IEEE 802.3 Standard in detail. ----- (10 Marks)

5. (a) Explain fragmentation and the fields related to the fragmentation in the IP datagram header. Discuss why IPV4 protocol needs to fragment some packets. ---- (10 Marks)

(b) Discuss Queuing System classification. Explain M/M/I queuing system. ---- (10 Marks)

6. (a) Explain the meaning of various fields in the TCP header format. ---- (10 Marks)

(b) Find the shortest path between the source nodes 1 to all other nodes for the network given below using Dijkstr’s algorithm. Also draw the shortest path tree from node 1 to all other nodes. ----- (10 Marks)

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

(a) Private IPV4 addresses

(b) Looping in Distance Vector routing protocol

(c) DHCP and RARP.