A network is a collection of computers, servers, network devices, or other devices connected to one another to allow the sharing of data form source to destination.
A computer network is a set of computers connected with each other for the purpose of sharing resources in between them.
An excellent example of computer network is the Internet, which connects millions of people all over the world.
Common types of area networks are:
LAN - Local Area Network.
WAN - Wide Area Network.
MAN - Metropolitan Area Network.