Madras University (UnOM) 2006 M.Sc Computer Science Computer network - Question Paper

PART A - (5 x two = 10 marks)


ans ALL ques..

All ques. carry equal marks.

every ans should not exceed 50 words.



1. Write the functions of physical layer.



2. What is piggy backing?



3. Write note on CRC checksum.



4. List out the contents of IP header.



5. provide the functions of Teletex.



PART B - (4 x five = 20 marks)



ans any 4 ques..

All ques. carry equal marks.

every ans should not exceed 250 words.



6. define the operation of communication satellite.



7. explain the concepts used in sliding window protocol.



8. Write note on wireless LAN.



9. What is static routing? discuss about static routing method.



10. discuss the services given by network layer.



11. discuss the model of traditional cryptography.



PART C - (5 X 10 = 50 marks)



ans ALL ques..

All ques. carry equal marks.

every ans should not exceed 500 words.



12. (a) discuss the different error-detection and error-correction codes.



Or



(b)Explain about OS! reference model.





13. (a) discuss the performance of stop and wait protocol.



Or



(b) What is pipelining? discuss the concepts used in pipelining.





14. (a) discuss connection oriented service and connectionless service and

their properties.



Or



(b) discuss about collision detection using

Ethernet.



15. (a) discuss the structure of internet control

protocol.



Or



(b) What is congestion? discuss the method of

controlling congestion by flow control.



16. (a) What is multiplexing? discuss its kinds with

an example.



Or



(b) What is digital signature? discuss digital

signature with public key cryptography.

Earning:   Approval pending.