In telecommunications a link is a communications channel that connects two or more communicating devices. This link may be an actual physical link or it may be a logical link that uses one or more actual physical links. A telecommunications link is generally one of several types of information transmission paths such as those provided by communication satellites, terrestrial radio communications infrastructure and computer networks to connect two or more points. The term link is widely used in computer networking (see data link) to refer to the communications facilities that connect nodes of a network. When the link is a logical link the type of physical link should always be specified (e.g., data link, uplink, downlink, fiber optic link, , etc.)

Read full article on Wikipedia · CC-BY-SA