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2. USB hub - Wikipedia

   en.wikipedia.org/wiki/USB_hub

   A four-port "compact design" USB hub: upstream and downstream ports shown. 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.

3. USB 3.0 - Wikipedia

   en.wikipedia.org/wiki/USB_3.0

   USB 3.0 port provided by an ExpressCard-to-USB 3.0 adapter may be connected to a separately-powered USB 3.0 hub, with external devices connected to that USB 3.0 hub. On the motherboards of desktop PCs which have PCI Express (PCIe) slots (or the older PCI standard), USB 3.0 support can be added as a PCI Express expansion card .

4. USB - Wikipedia

   en.wikipedia.org/wiki/USB

   All communications are between the host and one peripheral. In a FireWire network, any capable node can control the network. USB runs with a 5 V power line, while FireWire supplies 12 V and theoretically can supply up to 30 V. Standard USB hub ports can provide from the typical 500 mA/2.5 W of current, only 100 mA from non-hub ports.

5. USB hardware - Wikipedia

   en.wikipedia.org/wiki/USB_hardware

   Prior to Power Delivery, mobile phone vendors used custom protocols to exceed the 7.5 W cap on the USB Battery Charging Specification (BCS). For example, Qualcomm's Quick Charge 2.0 is able to deliver 18 W at a higher voltage, and VOOC delivers 20 W at the normal 5 V. [ 76 ] Some of these technologies, such as Quick Charge 4, eventually became ...

6. USB communications - Wikipedia

   en.wikipedia.org/wiki/USB_communications

   It is intended primarily to save cost in low-bandwidth human interface devices (HID) such as keyboards, mice, and joysticks. Full speed (FS) rate of 12 Mbit/s is the basic USB signaling rate defined by USB 1.0. All USB hubs can operate at this rate. High speed (HS) rate of 480 Mbit/s was introduced in 2001 by USB 2.0.

7. USB On-The-Go - Wikipedia

   en.wikipedia.org/wiki/USB_On-The-Go

   A powered USB hub may sidestep the issue, if supported, since it will then provide its own power according to either the USB 2.0 or USB 3.0 specifications. Some incompatibilities in both HNP and SRP were introduced between the 1.3 and 2.0 versions of the OTG supplement, which can lead to interoperability issues when using those protocol versions.