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COMPONENTS OF A NETWORK

There are many devices which are used in computer networking. Some of them are as follows:

Modem
Modem stands for modulator-demodulator. It is a computer device that
serves as a medium to exchange information between a computer and

the Internet through telephone lines. It converts the digital signals of a
computer into an analog form, so that they can travel over a telephone
line to their destination. This process is called modulation. The
receiving modem converts the analog signals back to digital form.
This process is called demodulation.

Network Interface Card (NIC)

Network Interface Card, also known as Ethernet card or LAN
card, is a device which is attached to a computer to enable it to
communicate over the network. It has a ROM chip that contains
a unique number, which is the hardware address or the Media
Access Control (MAC) address. It uniquely identifies a
computer on the network.

Hub

When a network has more than two computers, we cannot directly
connect all the computers together. We need an interface through
which the computers can be connected, so that sending and receiving
of data can take place. This function is performed by a hub. A hub

simply forwards the packets to all the other computers connected to it.

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