DISTANCE EDUCATION
M.C.A./M.C.A. (Lateral) DEGREE EXAMINATION,
DECEMBER 2017.
Third Semester
COMPUTER NETWORKS
(2010 Academic year onwards)
Time Three hours Maximum 100 marks
PART A — X 8 40 marks)
Answer any FIVE questions.
1. Distinguish between guided and unguided transmission
media.
2. Describe about the collision free protocol.
3. Explain the virtual circuit switching techniques.
4. Differentiate between the TCP and UDP.
5. Explain in detail symmetric key cryptography.
6. Describe any two flow control mechanisms.
7. Write a short note on Firewall.
8. Explain the Lossy and the Lossless Compression
techniques.
Sub. Code
302
DE-2992
2
SER
PART B — 15 60 marks)
Answer any FOUR questions.
9. Illustrate the structure of the OSI reference model.
10. Explain 3-bit sliding window protocol with suitable
example.
11. Describe the various Internet protocols and its
function.
Write a note on ICMP.
12. Explain the different fields and header in UDP
13. Describe about Electronic mail using SMTP.
14. Discuss the techniques for congestion control in network
layer.
15. Explain the following
DNS
WWW.