It is important to note, however, that these are theoretical maximum rates – the fastest possible transmission of data available to the USB port. Two of the most common connectors are the USB 2.0 and the USB 3.0 – each offering different transfer speeds.
As a standard, it defines the maximum signalling speeds available for devices to communicate with one another, transferring data across USB ports and cables. The last decade or so has seen the Universal Serial Bus (USB) emerge as the industry standard interface for connecting any number of hardware and devices to a computer – be it a mouse, keyboard, camera, external hard drive, scanner, or printer.
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