Computer Communication & Telecom Networks - Dec 2012

Electronics & Telecomm. (Semester 6)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks. 1 (a) What is IP address, physical address, port number and socket address of a device?(5 marks) 1 (b) What is piggybacking? How is its use significant?(5 marks) 1 (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) 1 (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) 2 (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) 3 (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) 4 (b) Differentiate between TCP and UDP.(10 marks) 5 (a) Explain the following medium sharing techniques:
1) Reservation
2) Polling
3) Token passing
(10 marks) 5 (b) Explain transparent bridges. Also show how bridge learning takes place with appropriate examples.(10 marks) 6 (a) Discuss Queing system classification. Explain M/M/1 Queing system.(10 marks) 6 (b) For the graph shown in the figure show the successive iterations of the Dijkstra's method of Shortest Path Algorithm. Take Node 1 as the root node.
(10 marks)(10 marks)

Write short notes (Any Two)

7 (a) Mobile IP(10 marks) 7 (b) DHCP(10 marks) 7 (c) OSPF(10 marks)