Answer:
Network:
A network is a group of two or more computer systems linked together. Examples
include local-area networks (LANs) and wide-area networks (WANs).
Different types of network:
Computer network can be classified into three classes_
1. LAN
(Local Area Network).
2. MAN
(Metropolitan Area Network).
3. WAN
(Wide Area Network).
LAN (Local Area Network):This
is one of the original categories of network, and one of the simplest. LAN networks connect computers together over
relatively small distances, such as within a single building or within a small
group of buildings.
MAN (Metropolitan Area Network):This
is another of the original categories of network, and slightly more complex in
nature. WAN networks connect computers together over large physical distances,
remotely connecting them over one huge network and allowing them to communicate
even when far apart. The Internet is a WAN, and connects computers all around
the world together.
WAN (Wide Area Network):This
is a network which is larger than a LAN but smaller than a WAN, and
incorporates elements of both. It typically spans a town or city and is owned
by a single person or company, such as a local council or a large company.