C 60094 (Pages : 2) ത
ರ ‏..ءٌ‎ 72
SIXTH SEMESTER B.Sc. DEGREE EXAMINATION, MARCH 2019
(CUCBCSS)
Computer Science
BCS 6B 14—COMPUTER NETWORKS
Time : Three Hours Maximum : 80 Marks

I. Answer all questions. Each question carries 1 mark :

1 The data link layer takes the packets from network layer and encapsulates them
into ——————— for transmission.

2 CRC stands for
3 An interconnected collection of piconets are called

4 ————— are specialized forums in which user with a common interest can exchange
messages.

5 layer in OSI model is responsible for the syntax and semantics of the
information transmitted.

6 ———————— is the set of techniques that allows the simultaneous transmission of multiple

signals across a single data link.
7 Ifthe physical links are limited to a pair of nodes it is said to be

8 The part of e-mail system which is responsible for manipulating mailboxes is
called

9 —————— routing algorithm uses Hello packets to learn about the neighbours.

10 End to end connectivity is provided from host to host in —___—— layer.

(10 x 1 = 10 marks)

II. Answer all questions. Each question carries 2 marks :
11 What are the criteria necessary for an effective and efficient network ?
12 What are the key design issues of a computer Network ?
13 What are the responsibilities of Data Link Layer ?
14 Differentiate gateway and router.
15 What do you mean by Character stuffing ?
(5x 2=10 ಇವೂ