LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.C.A. DEGREE EXAMINATION - COMPUTER APP.
FOURTH SEMESTER – APRIL 2012
CA 4801 - COMPUTER NETWORKS
Date : 18-04-2012
Time : 1:00 - 4:00
Dept. No.
Max. : 100 Marks
PART-A
Answer all Questions:
10*2=20
1. Define multiplexing. List its types.
2. What are error detecting codes? List them.
3. State the rules for CSMA/CD
4. List the different topologies and the transmission media used for LAN.
5. Differentiate routing and forwarding.
6. What are the different classes of IP address?
7. What are the limitations of network?
8. Define slow start.
9. What is argument marshalling and unmarshalling?
10. What are the types of tags?
PART-B
Answer all Questions:
5*8=40
11.a.) Explain the different classes of failures in a network.
(or)
b.) Illustrate the stop and wait algorithm.
12.a.) Explain the architecture of IEE 802.11 with a neat diagram.
(or)
b.) Explain the Gigabit Ethernet.
13.a.) Explain Virtual LAN.
(or)
b.) Discuss source routing with neat diagram.
14.a.) Explain TCP state transition diagram.
(or)
b.) Explain the three way handshaking mechanism.
15.a.)Explain MPEG compression with neat diagram.
(or)
b.) Discuss SMTP.
PART-C
Answer any two Questions:
2*20=40
(Q.No 16 is compulsory)
16. Discuss in detail the different layers in the OSI reference model.
17.a.) Explain the 10 Mbps specifications of IEEE 802.3.
b.) Illustrate the distance vector routing for the following network.
18.a.) Explain the RED algorithm for calculating the probability of packet drop.
b.) Explain in detail the DES encryption algorithm.
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