Reg No.:

Max. Marks: 100

1

2

3

4

5 ஐ
b)

6 2)
b)

7 a)
b)

8

9

10

11

12 a)

C6810 Pages: 2

Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
SIXTH SEMESTER B.TECH DEGREE EXAMINATION, APRIL 2018

Course Code: CS306
Course Name: COMPUTER NETWORKS (CS)

PART A
Answer all questions, each carries 3 marks.

How are computer networks classified on the basis of physical size?
Differentiate between normal and asynchronous balanced modes of operations in
HDLC.
What are the reasons for using Layered Architecture in Computer Networks?
Define the terms protocol and interface.
Draw and explain the frame format for Ethernet.

PART B

Answer any two full questions, each carries 9 marks.

What are the OSI service primitives for connection oriented service?
Explain the phases in a PPP connection with the help of a transition diagram.
How collision is avoided in CSMA/CA? Describe the different strategies used for
this.
List out the key design issues that occur in Computer Networks.
Describe the ISO/OSI layered architecture with the help of a neat diagram.
Write notes on IEEE 802.5 standard.

PART C

Answer all questions, each carries 3 marks.

What is flooding? Describe any two situations where flooding is advantageous.
Compare classful and classless addressing, giving examples for both.
Write short note on RIP.
List and explain any three closed loop congestion control techniques.

PART D

Answer any two full questions, each carries 9 marks.

Describe the format of IPv4 datagram with the help of a diagram, highlighting
the significance of each field.

Page 1 of 2

Duration: 3 Hours

Marks

(3)
(3)

(3)

(3)

(4)
(5)
(5)

(4)
(5)
(4)

(3)
(3)
(3)
(3)

(6)