What is a 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 video-conferences 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.