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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.
Within a multi-core processor, the back-side bus is often internal, with front-side bus for external communication. A front-side bus (FSB) was a computer communication interface (bus) often used in Intel-chip-based computers during the 1990s and 2000s. The competing EV6 bus served the same function for AMD CPUs. Both typically carry data between the central processing unit (CPU) and a memory controller hub, known as the northbridge.