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Modem
A Modem is a device which is used to transmit data over a network. It is attached to
computers that can convert digital signals (to be transmitted over telephone lines)
to analog (continuous electrical waves) and convert analog signals to digital signals
at the receiving end.
Modem is the short form of Modulator-Demodulator where the modulator can
Modem
convert digital signals to analog and the demodulator does the opposite.
Networking Cable
Networking cable also known as Ethernet cable is a transmission medium
that allows to transport information from one computer to other place.
There are various types of networking cables such as coaxial cable, twisted
pair cable and optical fiber cable.
Ethernet cable
Gateway
A gateway is a network device that allows to data to flow between two
different networks which may use different protocols. It collects data
that is to be sent from one computer, converts it into small packets
Gateway and then sends them to another computer.
i + TYPES OF NETWORKS
Different types of networks can be classified on the basis of geographical area they cover. There
are five types of networks as follows: Workstation
LAN (Local Area Network)
LAN is a digital communication system that interconnects a larger
number of computers and other peripheral devices within a radius
of less than 1 km. This type of network is useful when you want to
connect two different departments in a building (e.g., an office, a
building or a factory). The hardware, as well as software resources,
are shared through LANs. Your school lab is an example of LAN.
Server
MAN (Metropolitan Area Network) Local Area Network
MAN consists of two or more local area networks or campus area networks together. It usually spans
several buildings in the same city or town. It covers an area ranging from 10 to 100 km. For example,
the Internet services provided to users in a city or the ATM network of any area fall under MAN.
LAN LAN
Metropolitan Area Network
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