Computers were once thought of as machines for performing calculations, storing data, and automating commercial processes. A computer network or data network is a telecommunications network that allows computers to exchange data. Communications refer to the transmission of this digital data between two or more computers, and a computer network or data network is a telecommunications network that allows computers to exchange data. Cable or wireless media is used to make a physical link between networked computing devices. The Internet is the most well-known computer network.
