What is computer Network

A network is any collection of independent computers that communicate with one another over a shared network medium.A computer network is a collection of two or more connected computers. When these computers are joined in a network, people can share files and peripherals such as modems, printers, tape backup drives, or CD-ROM drives. When networks at multiple locations are connected using services available from phone companies, people can send e-mail, share links to the global Internet, or conduct videoconferences in real time with other remote users. As companies rely on applications like electronic mail and database management for core business operations, computer networking becomes increasingly more important.


Every network includes:

At least two computers Server or Client workstation,

and at most it can be millions of computers Printers and other devices of network:

Networking Interface Card’s (NIC)
NIC Card Diagrams:

A connection medium, usually a wire or cable, although wireless communication between networked computers and peripherals is also possible.

Network Operating system software, such as Microsoft Windows NT or 2000, Novell NetWare, Unix and Linux.