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Metropolitan Area Network (MAN)
MAN is a network of computers within a city, covering an area of hundreds
of kilometres in radius. MANs are formed by connecting multiple LANs.
Cable TV networks and networks between various branches of a school,
bank, hotel, and office within a city are examples of MANs. MANs can be
wired or wireless.

Wide Area Network (WAN)
WAN is a very large network that connects computers across a
country, a continent, or the world. A WAN usually consists of
multiple smaller networks. Usually, WANs use wireless technology.
Internet, ATMs and international business organisations use
WAN for their operations. WAN is used in the operations of the
Internet, ATMs, and international business organisations.

COMPONENTS OF COMPUTER NETWORK
Transmission Media
Transmission media is the medium through which computers in a network are connected with each
other. It is also used to transfer data from one device to another. Transmission media can be wired
or wireless.

Wired Transmission Media
Wired Transmission Media uses different types of cables or wires to connect devices in a network.

Twisted-Pair Cable
A Twisted-Pair Cable consists of two insulated copper wires twisted around
each other. The twisted-pair cable usually contains two or more pairs, all
within a single cable. Twisted-pair cable is relatively inexpensive, flexible,
and easy to install.

Outer Conductor Coaxial Cable
(Shield) A Coaxial Cable consists of two conductors. The inner conductor is
Inner
Conductor held inside an insulator called cladding, with the other conductor
Jacket
woven around it, providing a shield. An insulating protective
coating, called a jacket, covers the outer conductor. This cable is
widely used for cable television signal transmission.

Cladding

Optical Fibre Cable
An Optical Fibre Cable consists of thin glass fibres that can carry information Cladding
at high speeds and have a wide range of frequencies. A typical optical fibre
consists of a very thin strand of glass called the core. This cable provides the
fastest speeds of data transmission and can carry a large number of signals Glass fibre
at the same time. They are used for high-speed data and voice connections. (Core)

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