Page 10 - Trackpad_V1_Book 8_Flipbook
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COMPUTER NETWORK
A computer network is a collection of computers and their peripheral devices (the network’s
components) connected by communication links (wired or wireless) through which data is
transferred in the form of signals. In other words, a network is defined as a group of devices that
are linked together to share information, data and resources.
Note that a computer that is not connected to any network is known as a stand-alone computer
and a computer connected to a network is known as a node or workstation.
NEED OF COMPUTER NETWORKING
Networking is a way of getting all the devices to communicate with each other and use the same
data files and resources through a physical pathway called the transmission medium (cables).
This connection between devices can be either wired or wireless. The network serves the following
important purposes:
1. It allows information or files to be shared
with other computers in the network.
2. It allows computers in the network to
share hardware like printers, scanners, fax
machines, hard disks, etc.
3. It allows sharing of application software
over the network.
4. It allows rapid communication such as
e-mail, messaging, etc.
5. It allows us to store information in one centralised location.
6. It is a cost-effective method.
COMPONENTS OF A NETWORK
Before we discuss the components of a network, let us first understand the process of
communication between two persons. When two persons communicate with each other, one
speaks and the other listens. The person who is speaking is the sender and the person who is
listening is the receiver of the information. The voice originating from the sender reaches the
receiver through the air.
Therefore, air is the communication channel. "Communication channel is the medium that
helps carry information from one place to another." Now, let's learn about the components of a
computer network.
8 Trackpad (Version 1.0)-VIII

