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

1. The rules and procedures on which computers exchange data on network are called:

2. Sometimes, signals traveling through transmission media lose their quality This phenomenon is called:

3. It is a wireless or physical path between the sender and receiver through which data is sent and received from one place In another.

4. The physical layout in which computers are connected is called:

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

6. In optical fiber or fiber-optic cable data is transferred in the form of:

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

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

9. It is the channel or path through which the message is carried from sender to the receiver.

10. If computers and other devices are connected with a single cable, it is called:

11. Router determines data path to transfer data packets which is the:

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

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

14. The loss of energy in transmission signal refers to:

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

16. Change in the shape of signal between sender and receiver is called:

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

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

19. This organization is responsible for endorsing and coordinating the functions of the other standards organizations.

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