Define computer network and communication

Computer network is a collection of computers and devices connected via communication devices and transmission media.

For example : connect computers and printers

Communication - a process two or more computer or devices transfer data, instructions and information

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Devices = printer,scanner

Communication devices= Network interface card/NIC, Hub/Switch, Modem,Router

Transmision media = physical media use cable utp,coxial cable or fibec optic cable. Non physical use Infrared, radiowave and sattelite