7–2 Hardware and Software Guide
Hardware Upgrades and Replacements
Connecting a USB Device
A device connected to the computer by USB can be used when
the computer is running Windows.
Universal Serial Bus (USB) is a hardware interface that can be
used to connect an external device such as a USB keyboard,
mouse, drive, printer, scanner, or hub to the computer or an
optional expansion product.
A hub is a connecting device that can be either powered or
unpowered. USB hubs can be connected to a USB port on the
computer or to other USB hubs. Hubs support varying numbers of
USB devices and are used to increase the number of USB devices
in the system.
■ Powered hubs must be connected to external power.
■ Unpowered hubs must be connected either to a USB port on
the computer or to a port on a powered hub.