Various different types of computer devices that help us in our daily life and their importance

2. Index1. What are Network Devices
2. Network Interface Card (NIC)
3. Modem
4. Repeater
5. Hub
6. Switch

3. Network devices are components used to connect computers or other
electronic devices together so that they can share files or resources
like printers or fax machines. Devices used to setup a Local
Area Network(LAN) are the most common type of network devices
used by the public. A LAN requires a hub, switch, router.

4. Network Interface Card (NIC)
A network interface card is an expansion card that connects to
the motherboard and enables the computer to connect to a
network such as a home network or the internet using an R.J.
( Registered Jack) 45 connector. It acts as an interface
between a computer and the network.

5. Modem is a device which converts the computer-generated digital
signals of a computer into analog signals to enable their travelling
via phone lines. It is made up of 2 words Modulation and
Demodulation
• Modulation: Conversion of digital data to analog data
• Demodulation: Conversion of analog data to digital data

6. Repeater
If the distance between 2 connected computer or communicat –
ing devices is more than a limit, then data distortion may
happen and complete data signal may not reach the
destination. A repeater is a device which helps to prevent signal
distortion, It receives the signals, amplifies them and then
retransmits them

7. Hub
A hub is also known as a multiport repeater. It is used to
connect multiple computers or communicating devices, but it
has limitations. A hub is not an intelligent network device. It
may not be able to filter network traffic and it will send the
received data packet to all the connected nodes irrespective of
its real destination.

8. Switch
A switch is just like a hub and is also used to connect multiple
computers or communicating devices. It is an intelligent
network device because it can filter network traffic. So it will
not send the received data packet to all the connected node and
only to its real destination

9. Gateway
A gateway can be understood as an entry point through which
one network can be connected to another network. Like an ISP
(Internet Service Provider) which connects a general user to the
internet.