Punjab Technical University 2005 M.Tech Computer Science NETWORK SECURITY CS 503 - Question Paper

NETWORK SECURITY CS 503 first Sem May 2k5

Max marks 100

Note: Attempt any 5 ques.. All ques. carry equal marks.

1. What is the difference ranging from protocol, service and layers? Compare and contrast the OSI reference model and the TCP/IP model.

2. State the criteria for distinguishing LANs, MANs and WANs. Also explain the evolution of MAC protocols based on carrier sensing.

3. How can Gigabit Ethernet be integrated with wireless LAN? elaborate the design problems in doing so?

4. Discuss the technology behind various DSLs and cable modems. Why does the download speed in every case differ from the upload speed? discuss.

5. Discuss the header of Ipv6 explaining various fields. Also explain a few of the salient features that Ipv6 has over Ipv4.

6. What are multicast addresses? explain a few of the multicast protocols.

7. How is network security achieved at different layers? What is the fundamental difference in key exchange for digital signatures and achieving confidentiality?

8. Write short notes on:
(a) Authentication and data integrity
(b) Wireless LAN technologies.
(c) Security in Ipv6.
(d) IP addressing scheme.

Earning:   Approval pending.