Paper code: 13525
1525
B.Sc. (Computer Science) (Part 3)
Examination, 2019
Paper No. 3.1
COMPUTER NETWORKS
Time: Three Hours] [Maximum Marks: 50
Note: Attempt any five questions. All questions carry equal marks.
1. (a) Explain OSI reference model with a neat multi layered diagram. Also write the roles of various layers.
(b) Compare Internet and Intranet.
2. (a) Differentiate between packet switching and circuit switching with appropriate example.
(b) Compare base band and broadband coaxial cable.
3. (a) Explain working mechanism of communication satellite.
(b) What is ISDN ?
(c) What is infra red transmission ?
4. Explain various data link framing mechanism.
5. (a) How can bridge 802.x to 802.y, Explain ?
(b) Explain IEEE standard 802.4.
6. (a) Explain Network layer design issues.
(b) What do you mean by congestion control ?
7. (a) Explain working principle of Firewall.
(b) What is tunneling ?
8. (a) What are various IP classes ?
(b) Explain shortest path routing with appropriate example.
9. Write short notes (any two) :
(i) PPP
(ii) MIME
(iii) SMTP
……..End……..
Thank You!
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