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A 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. All devices connected through a USB hub share the bandwidth available to that hub.
A North American power strip with two USB power ports that includes a built in surge protector. A power strip (also known as a multi-socket, power board and many other variations [a]) is a block of electrical sockets that attaches to the end of a flexible cable (typically with a mains plug on the other end), allowing multiple electrical devices to be powered from a single electrical socket.
A multitap is a video game console peripheral that increases the number of controller ports available to the player, allowing additional controllers to be plugged in simultaneously in a manner similar to a power strip or a USB hub. A multitap often takes the form of a box with three or more controller ports which is then connected to a ...
To allow for voltage drops, the voltage at the host port, hub port, and device are specified to be at least 4.75 V, 4.4 V, and 4.35 V respectively by USB 2.0 for low-power devices, [a] but must be at least 4.75 V at all locations for high-power [b] devices (however, high-power devices are required to operate as a low-powered device so that they ...
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A major downside is that, for example, a 3 Gbit/s port might have a hub or expander installed and now be able to accommodate 6 devices, but at a maximum of 3 Gbit/s throughput bandwidth divided by the said 6 devices, or by however many are plugged in and being used.