The USB HUB
A USB hub is a device that allows many USB devices to be connected to a single USB port on the host computer or another hub.
USB hubs are often built into equipment, normally keyboards, or monitors or more rarely printers. Separate USB hubs come in a wide variety of form factors from boxes that look similar to a network hub to small designs intended to be plugged directly into the USB port on a computer (that is, without a connecting cable).
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