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NEED FOR COMPUTER NETWORK

Computers and other devices connected on a network help in:

Resource Sharing: It helps the users share files and hardware devices such as printers, scanners, etc.
Communication: It enables us to communicate with others via e-mail, video conference, instant
messaging, and so on.

ADVANTAGES OF COMPUTER NETWORK

The advantages of computer network are:

Sharing the information with others is simple.

It reduces the cost of hardware.
Information is stored in one central location.

Reliability means backing up information. If a system crashes, then the information is accessible on
another workstation for future use.

Installation cost is reduced.

The data is secured through the user authentication process.
People will have access to all the information they need to get and share through e-mail and instant
messaging, which saves time and money in passing information.

COMPONENTS OF DATA COMMUNICATION SYSTEM

There are mainly five components of a network which are as follows:
Sender: A sender is a computer that wants to send information to other computers connected to the
network.
Receiver: A receiver is a computer which, is expecting to receive data from other computers on the
network.

Transmission Medium: A transmission medium is a communication channel through which
information is transferred from one computer to another on a network.
Message: A message is the information or data that needs to be transferred from one computer to
another.
Protocol: A protocol is a set of standard rules used for communication.

NETWORK TERMINOLOGIES

There are several terms related to computer networks. Let us discuss some of them.

Server

A server is also called a host computer. It controls access to the network's hardware and software. It
provides a centralised storage area for the programs, data, and information.
The server that performs a specific task is called a dedicated server.

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