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2. USB hardware - Wikipedia

   en.wikipedia.org/wiki/USB_hardware

   Thus, USB cables have different ends: A and B, with different physical connectors for each. Each format has a plug and receptacle defined for each of the A and B ends. A USB cable, by definition, has a plug on each end—one A (or C) and one B (or C)—and the corresponding receptacle is usually on a computer or electronic device.

3. USB - Wikipedia

   en.wikipedia.org/wiki/USB

   An alternative to this is a compound device, in which the host assigns each logical device a distinct address and all logical devices connect to a built-in hub that connects to the physical USB cable. USB endpoints reside on the connected device: the channels to the host are referred to as pipes.

4. USB On-The-Go - Wikipedia

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

   USB OTG defines two roles for devices: OTG A-device and OTG B-device, specifying which side supplies power to the link, and which initially is the host. The OTG A-device is a power supplier, and an OTG B-device is a power consumer. In the default link configuration, the A-device acts as a USB host with the B-device acting as a USB peripheral ...

5. USB-C - Wikipedia

   en.wikipedia.org/wiki/USB-C

   Whereas earlier USB cables had a host end A and a peripheral device end B, a USB-C cable connects either way; and for interoperation with older equipment, there are cables with a Type-C plug at one end and either a Type-A (host) or a Type-B (peripheral device) plug at the other. The designation "C" refers only to the connector's physical ...

6. Computer port (hardware) - Wikipedia

   en.wikipedia.org/wiki/Computer_port_(hardware)

   Additionally, USB ports are color-coded according to the specification and data transfer speed, e.g. USB 1.x and 2.x ports are usually white or black, and USB 3.0 ones are blue. SuperSpeed+ connectors are teal in color. [2] FireWire ports used with video equipment (among other devices) can be either 4-pin or 6-pin. The two extra conductors in ...

7. Gender of connectors and fasteners - Wikipedia

   en.wikipedia.org/wiki/Gender_of_connectors_and...

   Classifying according to mathematical graph theory, USB buses are directed trees, whereas FireWire buses have a true bus network topology. This difference is reflected in the bus connectors used, in that USB cables are asymmetrical (one end Type A, other end Type B) while FireWire cables may have identical connectors at both ends.