A network can be:
Other devices can be connected to a network. For example, printers, disk drives, terminal server and communication servers. Computers can be of a different type
Thus, over a network, resources can be shared.
For a company (or university) this can maximise use of resources and all sorts of information (programs, data etc) can be easily exchanged or shared (over Email, Ftp, Telnet, Local network sharing).
Many networks exist in this department. We have local networks of
They all exist on a local (individual) network that share local printer resources.
However, they all connect to a large department layer of network and even to the Universities network before going onto the Internet.
Figure: Department Local Networks and Internet Connectivity