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

COMPUTER COMMUNICATION NETWORKS (CCN),

B.E. Electronics & Telecommunication,

Semester 7, December 2012.

Con. 8440-12

KR- 1530

(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.

(3) Assume suitable data wherever necessary.

1. (a) What is IP address, physical address, port number and socket address of a device. ---- (5 Marks)

(b) What is piggybacking? How is its use significant? ----- (5 Marks)

(c) Where is the MAC sub layer placed in the OSI model? What does it deal with and what services does it provide. ---- (5 Marks)

(d) Explain the role of internet layer and Network Interface Layer. ---- (5 Marks)

2. (a) What is flow control? Explain stop and wait ARQ with its state diagram. ---- (10 Marks)

(b) Compare packet switching, circuit switching and cell switching techniques with the help of timing diagram. ---- (10 Marks)

3. (a) Describe station types, configuration and communication (response) modes supported by HDLC protocol. ----- (10 Marks)

(b) Explain Repeater, Bridges, Routers and Switches. ---- (10 Marks)

4. (a) Explain how fragmentation and reassembly helps IP to work on a variety of physical networks. ------ (10 Marks)

(b) Differentiate between TCP and UDP. ---- (10 Marks)

5. (a) Explain the following medium sharing techniques: ----- (10 Marks)

(i) Reservation

(ii) Polling

(iii) Token passing.

(b) Explain Transparent bridges. Also show how bridge learning takes place with appropriate example. ----- (10 Marks)

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

(b) For the graph shown in the figure show the successive iterations of the Dijkstr’s method of Shortest Path Algorithm. Take node 1 as the root node. ----- (10 Marks)

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

(a) Mobile IP

(b) DHCP

(c) OSPF