A computer network or data network is a that tele communication allows to exchange . In computer networks, networked computing devices pass data to each other along data connections. Data is transferred in the form of packets. The connections () between nodes are established using either or . The best-known computer network is the .
Network computer devices that originate, route and terminate the data are called . Nodes can include such as , as well as . Two such devices are said to be networked together when one device is able to exchange information with the other device, whether or not they have a direct connection to each other.
Computer networks support such as access to the , shared use of , , and fax machines, and use of and applications. Computer networks differ in the used to transmit their signals, the to organize network traffic, the network’s size, and organizational intent.