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CompTIA A_ Certification All-In-One Exam Guide, Seventh Edition - Michael Meyers [513]

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(monitors, hard drives, etc.). Originally for laptops; later versions are incorporated in all AMD and Intel CPUs.

System Monitor Utility that can evaluate and monitor system resources, such as CPU usage and memory usage.

system resources In classic terms, the I/O addresses, IRQs, DMA channels, and memory addresses. Also refers to other computer essentials such as hard drive space, system RAM, and processor speed.

System Restore Utility in Windows that enables you to return your PC to a recent working configuration when something goes wrong. System Restore returns your computer’s system settings to the way they were the last time you remember your system working correctly—all without affecting your personal files or e-mail.

System ROM ROM chip that stores the system BIOS.

System Tools Menu containing tools such as System Information and Disk Defragmenter, accessed by selecting Start | Programs or All Programs | Accessories | System Tools.

system tray Contains icons representing background processes and the system clock. Located by default at the right edge of the Windows taskbar. Accurately called the notification area.

system unit Main component of the PC, in which the CPU, RAM, CD-ROM, and hard drive reside. All other devices—the keyboard, mouse, and monitor—connect to the system unit.

Tablet PC Small portable computer distinguished by the use of a touch screen with stylus and handwriting recognition as the primary modes of input. Also the name of the Windows XP-based operating system designed to run on such systems.

tailgating Form of infiltration and social engineering that involves following someone else through a door as if you belong.

take ownership Special permission allowing users to seize control of a file or folder and potentially preventing others from accessing the file/folder.

Task Manager Shows all running programs, including hidden ones, accessed by pressing CTRL-SHIFT-ESC. Able to shut down an unresponsive application that refuses to close normally.

taskbar Contains the Start button, the system tray, the Quick Launch bar, and buttons for running applications. Located by default at the bottom of the desktop.

TCP/IP (Transmission Control Protocol/Internet Protocol) Communication protocols developed by the U.S. Department of Defense to enable dissimilar computers to share information over a network.

Tech Toolkit Tools a PC tech should never be without, including a Phillips-head screwdriver, a pair of tweezers, a flat-head screwdriver, a hemostat, a Torx wrench, a parts retriever, and a nut driver or two.

telephone scams Social engineering attack in which the attacker makes a phone call to someone in an organization to gain information.

Telnet Terminal emulation program for TCP/IP networks that allows one machine to control another as if the user were sitting in front of it.

tera- Prefix that usually stands for the binary number 1,099,511,627,776 (240). When used for mass storage, it’s often shorthand for a trillion bytes.

terminal Dumb device connected to a mainframe or computer network that acts as a point for entry or retrieval of information.

terminal emulation Software that enables a PC to communicate with another computer or network as if the PC were a specific type of hardware terminal.

termination Using terminating resistors to prevent packet reflection on a network cable.

terminator Resistor that is plugged into the end of a bus cable to absorb the excess electrical signal, preventing it from bouncing back when it reaches the end of the wire. Terminators are used with coaxial cable and on the ends of SCSI chains. RG-58 coaxial cable requires resistors with a 50-Ohm impedance.

Test the theory Attempt to resolve the issue by either confirming the theory and learning what needs to be done to fix the problem, or by not confirming the theory and forming a new one or escalating. (One of the steps a technician uses to a solve a problem.)

texture Small picture that is tiled over and over again on walls, floors, and other surfaces to create the 3-D world.

TFT (thin film transistor) Type

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