![]() Physically separate USB hubs come in a wide variety of form factors: from external boxes (looking similar to an Ethernet or network hub), to small designs that can be directly plugged into a USB port (see the "compact design" picture). ![]() When such a device has many USB ports, they all usually stem from one or two internal USB hubs rather than each port having independent USB circuitry. USB hubs are often built into equipment such as computer cases, keyboards, monitors, or printers. All devices connected through a USB hub share the bandwidth available to that hub. A four-port "compact design" USB hub: upstream and downstream ports shownĪ USB hub is a device that expands a single Universal Serial Bus (USB) port into several so that there are more ports available to connect devices to a host system, similar to a power strip.
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