Computer Communication Networks - May 2014

Electronics & Telecomm. (Semester 7)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks.

Answer the following questions (any four)

1 (a) What do we mean by IP is the best effort delivery service?(5 marks) 1 (b) What is the difference between unicast and multi-cast routing?(5 marks) 1 (c) How does a repeater extend the length of a LAN?(5 marks) 1 (d) What is the advantage of controlled access over random access?(5 marks) 1 (e) What is the significance of twisting in twisted pair cable?(5 marks) 2 (a) Compare circuit, packet and message switching with examples.(10 marks) 2 (b) What is IP addressing? What are the various types of IP address classes? Explain in details with its maximum capacity? State their limitations.(10 marks) 3 (a) What is congestion? What are the various congestion control methods? Explain open loop congestion policies in details.(10 marks) 3 (b) What is interior and exterior routing? Compare link state and distance vector routing.(10 marks) 4 (a) What is HDLC? Explain various frame format, configuration and response mode supported by HDLC.(10 marks) 4 (b) What is carrier sensing? What are persistent strategies? Compare CSMA/CD and CSMA/CA.(10 marks) 5 (a) What is Ethernet? Explain IEEE 802.3 in details.(10 marks) 5 (b) Explain TCP header in detail.(10 marks) 6 (a) What is ALOHA? What are its types? Compare and contrast.(10 marks) 6 (b) Compare bit-stuffing and byte-stuffing. Bit stuff the following data
000 111 111 011 111 00 1111 00 11111(10 marks)

Write short notes on any two :-

7 (a) IEEE 802.5 standard(10 marks) 7 (b) SONET(10 marks) 7 (c) Transmission media(10 marks)