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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
THIRD SEMESTER MCA DEGREE EXAMINATION, DECEMBER 2017
Course Code:RLMCA 201
Course Name: COMPUTER NETWORKS
Max. Marks: 60 Duration: 3 Hours
PART A
Answer all questions, each carries3 marks. Marks
1 Explain the Basic Communication Model with neat diagram.
2 Differentiate between Persistent and non-persistent connection.
3 What are the transport layer services? Explain Multiplexing and Demultiplexing.
4 Compare IPv4 and IPv6. How IPv6 solve the problem of IPv4 exhaustion?
5 A series of 8-bit message blocks to be transmitted across a data link using CRC
for error detection. A generator polynomial of x3+x2+1 is to be used. Message
transmitted as 110010. Explain how CRC check is implemented?

6 Discuss about Switched and Bridged Ethernet.
7 Explain about the various layers of Bluetooth.
8 What you mean by VPN? Explain.
PART B
Answer six questions, one full question from each module and carries 6 marks.
Module I
9 Explain about the layered architecture of OSI Reference model with the help of a
neat diagram. What are the principal responsibilities of each of this layer?

OR
10 What do you mean by QoS? Explain with the flow control mechanisms.
Module II
11 Discuss about the MTA with the help of appropriate protocol. Give an example
for MAA.

OR
12 What is Socket Programming? Explain the echo server and echo client program
using UDP.

Module III
13 How reliability of data transfer is done in Transport Layer? Explain.
OR
14 Explain the principles of Congestion control with its efficiency and fairness.
Module IV
15 Explain the connection Management in Virtual Circuits with neat diagrams.
What are the different classifications of VCs?

OR
16 What is Routing? Explain Link state routing with OSPF protocol.
A A7402
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Module V
17 Discuss about Collision based Multiple access protocol. Compare it with token
based Multiple access protocols.

OR
18 Explain IEEE802.3 Ethernet with its access protocol.
Module VI
19 Explain Wi-Fi Architecture.
OR
20 Write a short note on:
Traffic analysis tools.
ii) Trouble Shooting.