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exists and is an alternate of . Making the world better, one answer at a time. If by IT you mean computer architecture, then the communication bus would be a physical path on the circuit board, that connects various components which passes electrical signals between each other. The nature of the signal is either on or off and the path is either serial or parallel in nature.
a set of parallel wires in a computer to which the central processing unit and all input-output units are connected. Each separate wire carries the electric current representing 1 bit. Buses interconnect the parts of the computer that communicate with each other, such as a video card or modem. bus.