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Posted By: Jaspreet Singh Member Level: Silver Posted Date: 16 Mar 2008
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2007 Guru Nanak Dev University B.C.A Sept 2007 Computer Networks Question paper
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BCA Part-III Sept 2007(GNDU)
Computer Networks
Time allowed-Three Hours Maximum Marks:100
Note: Attempt any Five questions.All questions carry equal marks. [20 marks each]
1. (a) What are protocols? Illustrate sliding window protocol.
(b) Discuss the role of communication subnet in a computer network. Which layers of OSI model does it cover?
2. (a) What are computer network? Discuss its various 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> Explain.
(b) Compare and contrast delivery of data units in the Transport layer,Data link layer and network layer.
4. What is multiplexing? Illustrate different types of multiplexing techniquespossible for signals.
5. Differentiate between the following:
(a) Fibre optic and coaxial cables.
(b) Packet switching and circuit switching.
6. (a) Explain the major functions performed by data link layer and network layer of OSI reference model.
(b) Define modulation and describe the following with suitable diagrams:
(i) Phase modulation.
(ii) Frequency modulation.
7. Explain the following:
(a) TCP/IP Model
(b) IEEE Standard 802.
8. (a) What are routing algorithms? Discuss their significance andsuitability.
(b) What is Internet|? Discuss its applications and also outline the internet security measures.
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