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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 helps us communicate with others through e-mail, video conference, instant
messaging, etc.
Data Security: Networks enable the implementation of security measures such as firewalls,
encryption, and access controls to protect sensitive information from unauthorized access,
interception, and tampering.
ADVANTAGES OF COMPUTER NETWORK
The advantages of computer network are:
The information can be easily shared with others.
It reduces the cost of hardware.
Enables seamless collaboration by facilitating the exchange of data, files, documents, etc.
Information is stored in one centralised location.
Reliability implies backing up of 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 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 A COMMUNICATION SYSTEM
There are mainly five components of a communication system, which are as follows:
Sender: A sender is a computer that wants to send information to other computer connected to the
network.
Receiver: A receiver is a computer which is expecting to receive data from other computer 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.
12 Plus (Ver. 4.0)-VIII

