Osmania University (OU) 2008-4th Year B.E Information Technology 3/ ( IT ) supply COMPUTER NETWORK - Question Paper

PART -A ( MARKS :25)

1. distinguish ranging from connection oreanted and connectionless service.

2. write about persistent and not perisitent CSMA.

3. what is QOS and list the Techniques for achieving good QOS?

4. what is meant by optimality principle?

5. list the services given by transport layer to the upper layer.

6. what is meant by downward multiplexing?

7. what is DNS?

8. elaborate emoticons.?

9. write about triple DES.

10. what is ESP?

PART -B (MARKS :50)

11. (A) compare OSI & TCP/IP reference models
(B)write in detail about Bluetooth.

12. list the 10principles of network layer in the internet and discuss IP protocol.

13. how is connection established and released in transport layer?

14. discuss in detail about voice over IP.

15. discuss how congestion in controlled in virtual subnets and datagrams.

16. (A) discuss the needs for a KDC.
(B) what is naming all about in WEB SECURITY

17. discuss about the subsequent

(A) address resolution protocol
(b TCP congestion control

Earning:   Approval pending.