1、A path or link through whichinformation passes between two devices. A channel can be either internal or external to a microcomputer. 2、In communications, a medium fortransferring information. Depending on its type, a communications channel can carry information (data, sound,and/or video) in either analogue or digital form. It can be a physical link, such as the cable connecting two stations in a network, or it can consist of electromagnetic transmission on one or more frequencies within a bandwidth in theelectromagnetic spectrum, as in radio and television.