Monday 30 July 2012

Unit Test Question Paper


Unit test questions
Data Communications and Computer Networks
Max. Marks: 20
Section-A
 2*5=10 marks

1.   Distinguish between analog and digital transmission.
2.     Explain about infrared and light wave transmission.
3. State the need for data communication networking.
4.     Write any four differences between serial and parallel communication.

5.  Define data communication?
6.     State the need for protocols in computer networks
7.     List the OSI 7 layers.

8. State Shannon capacity theorem?
9.     Briefly explain about serial communication.
10.     What is meant by a computer network

11. What is meant by network topology? Write the names of any three network topologies.
12. define half duplex and full duplex
13. Explain about serial communication
14. Explain about infrared and light wave transmission
15. define LAN, MAN, WAN
16. Define transmission media & list different types of transmission media



Section-B
(In this section answer 2 questions out of 3 questions)
2*5=10

1. Explain UTP, STP, Co-axial cable and fibre optical cable with cross-sectional view.
2.   Explain in detail with diagrams about STAR, BUS, RING, topologies.
3.   (a) define data communications. (b) explain the Shannon capacity and compare the characteristics of various transmission media.
4.   (a) explain the topology and technology of WLAN. (b) explain the Ethernet frame format.
5. Explain about baud, rate, simplex, half duplex and full duplex communication.
6.   Explain Shannon’s capacity and compare the characteristics of various guided media?
7. (a) explain about the cross section and applications of coaxial cable. (b) explain about the cross section and applications of optical fiber.
8   (a) explain about digital data digital signals. (b)explain about digital data analogue signals.

9.  Explain the OSI reference model with a neat sketch indicating the function of each layer.
10.   Compare various transmission media.
11. Explain the following (a) digital data and digital signals. (b) digital data and analog signals
12. write about different guided media and their applications

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signals are continuous in nature.