Ch. Charan Singh University 2007 B.C.A Computer Application Computer Communication & Network - Question Paper

BCA (IV Sem.)

B.C.A Examination, Dec-2007
Computer Communication & Network
(BCA-402)
Time: 3 Hours Maximum Marks: 75

Note: Attempt any 5 ques.. All carry equal marks.

1. (a) Compare TCP/IP reference model with OSI reference model.
(b)Explain the function of the subsequent layers in OSI reference model:
(i) Session Layer.
(ii) Transport Layer
(iii)Presentation Layer

2. (a) discuss and compare Nyquist and Shannon’s theorem for finding maximum data rate of any channel.
(b)With the help of improper example, discuss difference ranging from connection less and connection oriented communication.

3. Explain subsequent transmission media with help of diagram and their properties.
(i) Coaxial Cable
(ii) Fibre
(iii)Wireless
(iv) Twisted Pair

4. (a) discuss any 1 flow control protocol at data link layer along with algorithm.
(b)What is framing? discuss Bit stuffing and character stuffing.

5. Explain frame format and working of subsequent IEEE protocols.
(i) 802.3 (Ethernet)
(ii) 802.34 (Fast Ethernet)
(iii) 802.4 (Token Bus)
(iv) 802.5 (Token Ring)

6. (a) Draw through put graph for subsequent protocols.
(i) Slotted & Pure Aloha
(ii) CSMA
(iii) CSMA/CD
(b)What is firewall? What is basic principle of firewall? discuss its use in internet environment.

7. Explain any 4 routing protocols at network layer of OSI reference model.

8. (a)Difference ranging from leaky bucket and token bucket algorithm for congestion control.

(b)Explain the process of flow control and connection management at transport layer OSI reference model.

9. (a)Explain Domain Name System and its use in internet.
(b)Differentiate ranging from repeater, hub, switch and gateway kind of devices in computer networks.

10. Write short notes on
(i) ATM
(ii) Modem
(iii) Cellular Technology.

Earning:   Approval pending.