Guru Nanak Dev University 2007 B.C.A Computer Application t Computer Networks - Question Paper

BCA Part-III Sept 2007(GNDU)

Computer Networks

Time allowed-Three Hours Maximum Marks:100


Note: Attempt any 5 ques..All ques. carry equal marks. [20 marks each]



1. (a) elaborate protocols? Illustrate sliding window protocol.

(b) explain the role of communication subnet in a computer network. Which layers of OSI model does it cover?

2. (a) elaborate computer network? explain its different topologiesand their respective suitability.

(b) Compare and contrtastdigital and analog data transmission.

3. (a) What is OSI reference model? Why layered approach is followed in this model> discuss.

(b) Compare and contrast delivery of data units in the Transport layer,Data link layer and network layer.

4. What is multiplexing? Illustrate various kinds of multiplexing techniquespossible for signals.

5. Differentiate ranging from the following:

(a) Fibre optic and coaxial cables.
(b) Packet switching and circuit switching.

6. (a) discuss the major functions performed by data link layer and network layer of OSI reference model.

(b) describe modulation and define the subsequent with suitable diagrams:

(i) Phase modulation.
(ii) Frequency modulation.

7. discuss the following:

(a) TCP/IP Model
(b) IEEE Standard 802.

8. (a) elaborate routing algorithms? explain their significance andsuitability.

(b) What is Internet|? explain its applications and also outline the internet security measures.

Earning:   Approval pending.