Bus is an electrical pathway through which bits are transmitted between the various computer components. In other words, the bus is the channel, which lets the parts of a computer, communicates with each other. A bus is classified by name according to its function.
The control Bus: is the path for all timing and controlling functions sent by the control units to other units of the system. For example, a control bus line is used to indicate whether the CPU is attempting to read from memory or to write to it.
Address Bus: is the pathway used to locate the storage position in memory where the next instruction to be executed or the next piece of data will be found.
Data Bus: is the pathway where the actual data transfer takes place. It is the one which carrier data through CPU. The wider the data bus, the more data it can carry at one time.
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