Data Communication and Computer Networks – Online MCQs Test – Computer Science 9th

1. It is the rate at which data is transferred and normally measured in bits per second.

2. The text, numbers, symbols, images, voice and video which are processed by computers and digital devices are called:

3. It is the aunt her of signals transmitted per second.

4. It is an agreement between two parties or venders, using communication devices.

5. It is used for long distance transmission of data and covers a larger geographical area like cities, provinces or even countries.

6. Wired Media is also called:

7. Signal-to-noise ratio is often expressed in:

8. The human voice is example of an/a:

9. Both Physical and Logical addresses are:

10. In this signals are transmitted in a narrow pathway using physical links.

11. It means change in the shape of the signal.

12. Radio-waves, microwaves and infrared are examples of:

13. Unwanted signal that mixes lip with the original signal during the transmission of data is called:

14. Loss of signal energy is called:

15. Communication system is made up of:

16. Twisted-pair cable, coaxial cable, radio waves are examples of:

17. Continuously varying signals or waves that change with time period are called:

18. This model divides a communication system into seven abstraction layers.

19. It is a device that connects two or more networks.

20. The topology in which all computers are connected to a central device called hub is: