20. what is the data bus.

> In computer architecture, a bus (related to the Latin "omnibus", meaning "for all") is a communication system that transfers databetween components inside a computer, or between computers.that is called data bus .In computer architecture, a bus (related to the Latin "omnibus", meaning "for all") is a communication system in data bus there are many data and information This page describes the term internal data bus and lists other pages on the Web where you can find additional information.  An internal pathway across which data are transferred to and from the processor or to and from memory. See local bus .A data bus is a computer subsystem that allows for the transferring of data from one component to another on a motherboard or system board, or between two computers. This can include transferring data to and from the memory, or from thecentral processing unit (CPU) to other components. Each one is designed to handle so many bits of data at a time. The amount of data a data bus can handle is calledbandwidth.

A typical data bus is 32-bits wide. This means that up to 32 bits of data can travel through a data bus every second. Newer computers are making data buses that can handle 64-bit and even 96-bit data paths. At the same time they are making data buses to handle more bits, they are also making devices that can handle those higher bitrates.

Bus Controllers

In the early days of the personal computer, manufacturers created motherboards with data buses that were directly connected to the computer's memory and peripherals. These electrical buses were designed to run parallel to each other and had multiple connections. This direct connection was problematic for a number of reasons, but especially because all devices were forced to run at the same speed. that is called data bu so it is most important in computer system . 

                                                           figar of data bus.