University of Mumbai 2009-3rd Sem B.Sc Information Technology (IT) Computer Networks - Question Paper
Kindly obtain the attachment.
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Dec.pr 196 Compute* Mccocnr4
(3 Hours) [ Total Marks : 100
N.B. : (1) Question No. 1 is compulsory.
(2) Attempt any four from the remaining question.
(3) Each question carries equal marks.
1. (a) What is the architecture of OSI reference model ? Explain the layers clearly. 10 (b) What is the difference between dual cable and single cable ? 10
2. Write short notes on : 20
(i) Fiber optic cable
(ii) Twisted pair cable.
3. (a) What is piggybaking and pipelining technique ? Explain briefly. 10 (b) Write short notes on : 10
(i) Repeater
(ii) Bridge .
(iii) Gateways
(iv) Protocol converters.
4. (a) What is topology ? List down all types of topology. Explain any two topologies with its 10
advantages and disadvantages.
(b) What is the difference between stop and wait flow control and sliding window flow 10 control ?
5. (a) Explain TCP/IP reference model. 10
(b) What are the three phases of an X- 25 connection ? 10
6. (a) Write short notes on : 10
(i) layer and protocol
(ii) 802-3 Bridges.
(b) What is IP ? Explain IP datagram in detail. 10
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