MU Electronics and Telecom Engineering (Semester 7)
Computer Communication Networks
May 2014
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


Answer the following questions (any four)
1 (a) What do we mean by IP is the best effort delivery service?
5 M
1 (b) What is the difference between unicast and multi-cast routing?
5 M
1 (c) How does a repeater extend the length of a LAN?
5 M
1 (d) What is the advantage of controlled access over random access?
5 M
1 (e) What is the significance of twisting in twisted pair cable?
5 M

2 (a) Compare circuit, packet and message switching with examples.
10 M
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 M

3 (a) What is congestion? What are the various congestion control methods? Explain open loop congestion policies in details.
10 M
3 (b) What is interior and exterior routing? Compare link state and distance vector routing.
10 M

4 (a) What is HDLC? Explain various frame format, configuration and response mode supported by HDLC.
10 M
4 (b) What is carrier sensing? What are persistent strategies? Compare CSMA/CD and CSMA/CA.
10 M

5 (a) What is Ethernet? Explain IEEE 802.3 in details.
10 M
5 (b) Explain TCP header in detail.
10 M

6 (a) What is ALOHA? What are its types? Compare and contrast.
10 M
6 (b) Compare bit-stuffing and byte-stuffing. Bit stuff the following data
000 111 111 011 111 00 1111 00 11111
10 M

Write short notes on any two :-
7 (a) IEEE 802.5 standard
10 M
7 (b) SONET
10 M
7 (c) Transmission media
10 M



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