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Hub or Switch: It is hardware device that has various ports 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 communication between all the connected devices.
Router: It is a networking device used to connect and facilitate transfer of data between two
networks.
Modem: It stands for MODULATOR – DEMODULATOR. It is a hardware device that is used
to connect a computer to the Internet via a telephone line or a wireless medium. It converts
data from digital to analog and vice versa. The process of converting analog signals to digital
signals is called demodulation. The process of converting digital signals to analog signals is
called modulation.
Networking Cable: It is a transmission medium that allows to transport information from one
place to other place. There are various types of networking cables, such as coaxial cable, twisted
pair cable, and optical fiber cable.
Tech Funda
Networking cable is also known as Ethernet Cable.
TYPES OF NETWORK
Different types of networks can classified on the basis of geographical areas covered. There are
five types of networks as follows:
LAN (Local Area Network)
It is a digital communication system that interconnects a large
number of computers and other peripheral devices within a radius
of less than 1 km. This type of network is usually preferred for a
smaller area such as a residence, school, laboratory, university
campus or office building.
MAN (Metropolitan Area Network) Local Area Network
This network consists of two or more local area networks or campus area networks that usually
spans several buildings in the same city or town.
LAN LAN
Metropolitan Area Network
Computer Networking 19

