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USB X-TENDER
Glossary
USB, like most other standards, has its own set of
buzzwords. Here are definitions for a few of them.
USB
The “Universal Serial Bus” communication interface.
USB device
A computer peripheral such as a keyboard, mouse,
printer, scanner, camera, etc., that outputs or inputs
data on USB. A USB hub functions as a “USB device” to
a computer, but as a “USB host” to peripherals.
USB host
A computer or other central piece of equipment with
USB ports to which USB devices can be attached. A USB
hub functions as a “USB host” to peripherals, but as a
“USB device” to a computer.
USB hub
A concentrator that allows one or more USB devices to
be connected to a single USB port on a host. For
example, a 4-port hub can connect up to four USB
devices to one USB-host port. All USB hubs are full-
speed devices “upstream” and support any combination
of full-speed and low-speed devices “downstream.”
