Components
Of Computer Network
Major
components of a computer network are:
1. NIC(National interface card)
NIC is a device that helps the computer to communicate with
another device. The network interface card contains the hardware addresses, the
data-link layer protocol use this address to identify the system on the network
so that it transfers the data to the correct destination.
There are two types of NIC: wireless NIC and wired NIC.
- Wireless NIC: All the modern laptops
use the wireless NIC. In Wireless NIC, a connection is made using the
antenna that employs the radio wave technology.
- Wired NIC: Cables use the wired
NIC to
transfer the data over the medium.
2. Hub
Hub is a central device that splits the network connection into
multiple devices. When computer requests for information from a computer, it
sends the request to the Hub. Hub distributes this request to all the
interconnected computers.
3. Switches
Switch is a networking device that groups all the devices over the
network to transfer the data to another device. A switch is better than Hub as
it does not broadcast the message over the network, i.e., it sends the message
to the device for which it belongs to. Therefore, we can say that switch sends
the message directly from source to the destination.
4. Cables and connectors
Cable is a transmission media that transmits the communication
signals. There are three types of cables:
- Twisted pair cable: It is a
high-speed cable that transmits the data over 1Gbps or more.
- Coaxial cable: Coaxial cable resembles
like a TV installation cable. Coaxial cable is more expensive than twisted
pair cable, but it provides the high data transmission speed.
- Fibre optic cable: Fibre
optic cable is a high-speed cable that transmits the data using light
beams. It provides high data transmission speed as compared to other
cables. It is more expensive as compared to other cables, so it is
installed at the government level.
5. Router
Router is a device that connects the LAN to the internet. The router is mainly
used to connect the distinct networks or connect the internet to multiple
computers.
6. Modem
Modem connects the computer to the internet over the existing
telephone line. A modem is not integrated with the computer motherboard. A
modem is a separate part on the PC slot found on the motherboard.
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