A connection is the establishment of a flow of information from one device connector to a compatible connector on another device. One example of a connection is the attachment of a speaker to an audio card with speaker wire. Typically, an application might enable the speaker connector on an audio card, causing the flow of information out of the speaker connector. If you have connected the wire, then the audio is heard. In this case the multimedia system must rely on a person to make the actual connection.
Another category of connection exists where the connection is made internally in the computer, typically through the transfer of digital information from one media device to another. For instance, the waveaudio media device has a connection to its associated amplifier mixer device.