• Choose a category
• All
• Classic-Fiction

Category 2 UTP Supports speeds up to 4 megabits per second.

Category 3 UTP Supports speeds up to 16 megabits per second.

Category 4 UTP Supports speeds up to 20 megabits per second.

Category 5 UTP Supports speeds up to 100 megabits per second.

Category 5e UTP Supports speeds up to 1000 megabits per second.

Category 6 UTP Supports speeds up to 10 gigabits per second.

V standards Standards established by CCITT for modem manufacturers to follow (voluntarily) to ensure compatible speeds, compression, and error correction.

Verify Making sure that a problem has been resolved and will not return. (One of the steps a technician uses to a solve a problem.)

vertices Used in the second generation of 3-D rendering, vertices have a defined X, Y, and Z position in a 3-D world.

VESA (Video Electronics Standards Association) Consortium of computer manufacturers that standardized improvements to common IBM PC components. VESA is responsible for the Super VGA video standard and the VLB bus architecture.

VGA (Video Graphics Array) Standard for the video graphics adapter that was built into IBM’s PS/2 computer. It supports 16 colors in a 640 × 480 pixel video display and quickly replaced the older CGA (Color Graphics Adapter) and EGA (Extended Graphics Adapter) standards.

video capture Computer jargon for the recording of video information, such as TV shows or movies.

video card Expansion card that works with the CPU to produce the images displayed on your computer’s display.

video display See monitor.

virus Program that can make a copy of itself without your necessarily being aware of it. Some viruses can destroy or damage files. The best protection is to back up files regularly.

virus definition or data file Files that enable the virus protection software to recognize the viruses on your system and clean them. These files should be updated often. They are also called signature files, depending on the virus protection software in use.

virus shield Passive monitoring of a computer’s activity, checking for viruses only when certain events occur.

VIS (viewable image size) Measurement of the viewable image that is displayed by a CRT rather than a measurement of the CRT itself.

voice coil motor One of two methods used to move actuator arms in a hard drive. (See also stepper motor.)

VoIP (Voice over Internet Protocol) Collection of protocols that make voice calls over a data network possible.

volatile Memory that must have constant electricity to retain data. Alternatively, any programmer six hours before deadline after a non-stop, 48-hour coding session, running on nothing but caffeine and sugar.

volts (V) Measurement of the pressure of the electrons passing through a wire, or voltage.

volume Physical unit of a storage medium, such as tape reel or disk pack, that is capable of having data recorded on it and subsequently read. Also refers to a contiguous collection of cylinders or blocks on a disk that are treated as a separate unit.

volume boot sector First sector of the first cylinder of each partition; stores information important to its partition, such as the location of the operating system boot files.

voucher Means of getting a discount on the CompTIA A+ exams.

VPN (virtual private network) Encrypted connection over the Internet between a computer or remote network and a private network.

VRM (voltage regulator module) Small card supplied with some CPUs to ensure that the CPU gets correct voltage. This type of card, which must be used with a motherboard specially designed to accept it, is not commonly seen today.

VRR (vertical refresh rate) The amount of time it takes for a CRT to draw a complete screen. This value is measured in hertz, or cycles per second. Most modern CRTs have a VRR of 60 Hz or better.

wait state Occurs when the CPU has to wait for RAM to provide code. Also known as pipeline stalls.

WAP (Wireless Access Point) Device that centrally connects wireless network nodes.

wattage (watts or W) Measurement of the amps and volts needed