LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
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M.Sc. DEGREE EXAMINATION – COMPUTER SCIENCE
THIRD SEMESTER – APRIL 2008
CS 3808 – COMPUTER NETWORKS
Date : 26/04/2008 Dept. No. Max. : 100 Marks
Time : 9:00 – 12:00
Part-A
Answer all the questions 10 X 2 = 20
- List out the uses of Computer Networks.
- Write any two advantages of coaxial cable.
- Define: Hamming distance. Give an example.
- What is piggybacking?
- List some of the internet control protocols used in the network layer.
- Differentiate between unicast and multicast routing.
- Why DNS is essential in the application layer?
- Define Cryptography.
- What is kerckhoff’s principle?
- List the data compression techniques.
PART-B
ANSWER ALL THE QUESTIONS: 5 X 8 = 40
- a) Write a short note on any two OSI Reference model.
(Or)
- b) Differentiate between frequency division multiplexing and time division multiplexing.
- a) Compare Static and Dynamic Channel Allocation in LANs and MANs
(Or)
- b) Give a short note on fast Ethernet.
- a) Explain about Bluetooth Application
(Or)
- b) What is tunneling? Give a real time example.
- a) What are the possible scenario for a transport connection?
(Or)
- b) List down the states used in TCP connection management finite state machine.
- a)Give a brief note on the design issues of presentation layer.
(Or)
- b) Explain about file transfer.
PART –C
ANSWER ANY TWO QUESTIONS: 2 X 20 = 40
- a) Differentiate between TCP/IP and OSI reference model.
- b) Discuss in detail about design issues of data link layer.
- Explain the principles of Network layer in the Internet.
- a)What is cryptographic? Write a note on two principles of cryptographic.
- b) What is the use of file management? Give a real time example.