Client A network node that uses services provided by a server. A network in which some nodes provide special services, such as printing and file sharing, for other nodes. Closed Access is not available. A data-transmission medium that contains a single conductor surrounded by a metal shield. Common carrier A company that provides telecommunications services to the public.
Telephone companies are an example.
Communication A process by which information is transferred between at least two parties. The medium through which information is transmitted. A specialized network node that provides clients with access to communications capabilities. A typical example is a computer that provides other nodes with access to a shared modem. Contention A media-access control strategy in which devices attempt to transmit when the channel is not being used by another device.