In this article, you will learn some of the most common questions and answers about Computer Network.
1. What is a Computer Network?
Networks consist of a set of devices connected by physical transmission means.
2. What is Link?
A link refers to the connectivity between two devices. It includes the type of cables and protocols used in order for one device to be able to communicate with other.
3. What is Node?
A node is a point or joint where a connection takes place. It can be computer or device that is part of a network. Two or more nodes are needed in order to form a network connection.
4. What is Cookie?
Cookie is a tiny code that is stored in the browser of a user by a website for various reasons, such as tracking, advertising, and so on.
5. What is Data Communication?
A process of sending and receiving data between source and destination, in both ways. It is the exchange of data between two devices via some form of transmission media.
6. What are the elements of Data Communication?
Data communication elements are:
- Sender
- Receiver
- Transmission Medium
- Message
- Protocol
7. What is Sender?
The sender is the device that sends the data message. It can be a computer, a phone handset, a video camera, and so on.
8. What is Receiver?
The receiver is the device that receives the message. It can be a computer, a telephone handset, a television, and so on.
9. What is Transmission Medium?
The transmission medium is the physical path by which a message travels from sender to receiver. Some examples of transmission medium include twisted-pair wire, coaxial cable, fiber-optic cable and radio waves.
10. What is Message?
The message is the information (data) to be communicated. Information includes texts, numbers, pictures, audios and videos.
11. What is Protocol?
A protocol is a set of rules that govern data communication. It represents an agreement between the communication devices.
12. What is Transmission?
A process of sending and receiving data between source and destination, in only one way. It is regarded as the physical movement of data.
13. What are the modes of Data Transmission?
There are two types of mode of data transmission:
- Asynchronous Mode of Data Transmission
- Synchronous Mode of Data Transmission
14. What is Asynchronous mode of Data Transmission?
It is a serial mode of transmission. In this mode of transmission, each byte is framed with a start bit and a stop bit. There may be a variable length gap between each byte. There is only one line and the bits are sent sequentially.
15. What is Synchronous mode of Data Transmission?
It is a parallel mode of transmission. In this mode of transmission, bits are sent in a continuous stream without start and stop bit and without gaps between bytes.
16. What are types of Transmission Media?
Transmission media are two types:
- Guided Transmission Media
- Unguided Transmission Media
17. What is Unguided Transmission Media?
This is the wireless media that transport electromagnetic waves without using a physical conductor.
18. What are the varieties of Twisted Pair Cable?
Twisted pair cable comes in two varieties:
- Unshielded Twisted Pair
- Shielded Twisted Pair
19. What is use of Unshielded Twisted Pair?
In general, this is the most popular and best option for school networks.
20. What is Shielded Twisted Pair?
It is suitable for environments with electrical interference. However, the extra shielding can add to the cable’s bulk. Often, it is used in networks that use the token ring topology.
21. What is Coaxial Cable?
Coaxial cabling has a single copper conductor at its center. A plastic layer provides insulation between the center conductor and a braided metal shield. The metal shield helps to block any outside interference from fluorescent light, motors, and other computers. Outer shield provided the ground.
22. What is an Optical Fiber?
It is a method of transmitting of information from one place to another by sending light through an optical fiber.
23. What is Data Transfer Rate?
This is the speed at which data is moving from one part of a network to another.
24. What are the types of Connecting Devices?
There are five types of connecting device:
- Repeaters
- Hubs
- Bridges
- Routers
- Switches
25. What is Router?
Router is a network device that connects two or more networks. A router is a device that transfers information from a source to a destination. Routers are located at gateway and forward data packets.