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El USB soporta intercambio de datos y control funcionales entre el Host USB y un Dispositivo USB
como un juego de canales uni-direccionales o bidireccionales. USB data transfers take place between
host software and a particular endpoint on a USB device. Such associations between the host software
and a USB device endpoint are called pipes. In general, data movement though one pipe is independent
from the data flow in any other pipe. A given USB device may have many pipes. As an example, a given
USB device could have an endpoint that supports a pipe for transporting data to the USB device and
another endpoint that supports a pipe for transporting data from the USB device.
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