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Bandwidth

The capability of a transmission medium to transmit the maximum amount of data from one
computer to another over a computer network in a given amount of time is called bandwidth.
A bandwidth is generally in bits per second (bps) or Bytes per second (Bps), Kilobytes per second

(Kbps) and Megabytes per second (Mbps). There can be various types of bandwidths which are
network bandwidth, data bandwidth or digital bandwidth.

Let’s CatCh uP

Write the names of any four network terminologies.
1. _______________________ 2. _______________________

3. _______________________ 4. _______________________

DEVICES REQUIRED FOR A NETWORK

There are various types of devices such as Network Interface Card (NIC), Hub, Switch, Router, Modem,
Network Cable and Gateway. Let us discuss about these in detail.

Network Interface Card (NIC)

It is an expansion card which provides the network access to a computer. It allows
the computer to connect to a network through a wired or wireless medium.

Hub or Switch Network Interface Card
It is hardware device that has various boxes to which the computers,
printers and other networking devices are connected. The main function

of a hub is to direct information around the network and facilitate
Hub or Switch
communication between all the connected devices.
Router

It is a networking device used to connect and facilitate transfer of data
in the form of packets between two network. It finds best route for
data packets over the network. It is located at the gateways where two
networks connect.

Modem Router

It stands for MODULATOR–DEMODULATOR. It is a hardware device that allows a
computer to send and receive data over a telephone line. It converts data from digital
to analog and vice versa. The process of converting digital signals to analog signals is
called modulation. The process of converting analog signals to digital signals is called
Modem demodulation.

Computer Networking 11