CH04 - Peripheral Devices

A device used to send or display data from a computer.

Output device

A unit of measurement that indicates an amount of light.

Lumen

A set of communication protocols that allow devices to communicate when they are within 1.6 inches of one another. NFC devices are commonly used in retail stores and restaurants with Tap Pay phone apps.

Near-field communication (NFC)

A device that runs on power it receives from another device through a USB port.

Bus-powered

Part of an image that stays on-screen after the rest of the image has left.

Artifact

Also known as image retention (IR), _________ is when an image is displayed on a screen for too long and becomes permanently stuck.

Burn-in

A file format.

Codec

The number of bits used for each color component of a single pixel.

Color depth

A device that captures an analog signal and turns it into digital data. Examples include graphics tables, document scanners, and 3D scanners.

Digitizer

Conduits used by high-speed devices to bypass the CPU and communicate directly with RAM.

Direct Memory Access (DMA)

A program that enables the operating system to interact with hardware devices.

Driver

The act of adding or removing devices to a system without rebooting.

Hot plugging

A device that can be added and removed without shutting down the computer. For example, thumb drives are hot swappable.

Hot swappable device

A device that can input data to a computer and accept output data from a computer. Example include CD-ROMs, DVD-ROMS, USB flash drives, hard disk drives, network adapters, and Bluetooth adapters.

Input & output (I/O) device

A device that sends data to a computer.

Input device

A data address that allows two devices in a computer to send information to each other.

Input/Output Address (I/O Address)

A communication method that allows a device to to interrupt the CPU and request processing time.

Interrupt Request (IRQ)

A switch that allows multiple computers to use a single keyboard, mouse, and monitor.

KVM (keyboard, video, mouse) switch

A measurement of an image's sharpness and clarity. The more pixels that make up an image, the higher its resolution.

Resolution

Revert a system that has received an update or other change to its previous state.

Roll back

A device that runs on power from a wall outlet.

Self-powered

The most commonly used connection interface.

Universal Serial Bus (USB)

A simplified startup mode that can help you troubleshoot video card issues that interrupt Windows OS functions.

Video Graphics Array (VGA) mode