A USB A-to-B cable is a cable that is meant to be plugged in only one way and features two different connectors to make it impossible to connect incorrectly. USB A is the upstream port and USB B is the downstream port.Continue Reading
The USB A port connects to the computer and the USB B port connects to the device. The USB A port is rectangular in shape and the USB B port is square with two cut corners to ensure correct orientation.
USB is a high speed bus that allows a vast array of devices to connect to the same type of port. This eliminates many of the complexities of adding peripherals to computers before USB ports became standard.Learn more about Computers & Hardware