Enrollment No. ...........

END TERM EXAMINATION

FOURTH SEMESTER (BCA) MAY 2018

Paper Code: BCA-210

Subject: Computer Network

Time: 3 Hours

Maximum Marks: 75

Note: Attempt five questions in all including Q.no.1 which is compulsory. Select one question from each unit.

Q1. (a) Explain Shannon Capacity Theorem. 2.5
(b) What are different components of data communication? 2.5
(c) Discuss different types of transmission impairments. 2.5
(d) What is Flooding? 2.5
(e) Write a short note on DNS. 2.5
(f) Define network. Discuss various network criteria. 2.5
(g) Explain Piggybacking and its benefits. 2.5
(h) What is a datagram? 2.5
(i) Discuss Broadband-ISDN. 2.5
(j) Write a short note on cable modems. 2.5

UNIT-I

Q2. (a) Write a short note on guided media. 8.5
(b) Define throughput, bandwidth, response time, and frequency. 4

Q3. (a) Draw a neat diagram of OSI model and explain the functioning of each layer. 9.5
(b) Differentiate between simplex, half duplex and full duplex. 3

UNIT-II

Q4. (a) Define ISDN. What are its various services and layers? 6
(b) What is multiplexing? Explain various types of multiplexing. 6.5

Q5. (a) Define Flow Control. Explain any one flow control algorithm. 6.5
(b) Differentiate between circuit, packet and message switching. 6

UNIT-III

Q6. (a) What is routing? Explain distance vector routing algorithm with an example. 6
(b) Write a short note on following networking devices: 6.5
(i) repeaters
(ii) bridges
(iii) gateways
(iv) routers

Q7. (a) Explain static and dynamic routing. 7.5
(b) What is forwarding function? Explain link state routing algorithm with an example. 5

UNIT-IV

Q8. (a) Explain three-way handshaking connection management in TCP. 7.5
(b) Compare TCP and UDP Protocols. 5

Q9. (a) Explain TCP packet format in detail. 8.5
(b) What are the functions of session and presentation layer? 4