Τεχνικός Υπολογιστών CompTIA A+

A reference to sound and visual data, such as movies or stills.

The type of electrical power from a wall outlet.

device that checks a wall outlet’s wiring.

A technology in mobile devices to detect screen orientation and adapt what is shown onscreen for that viewing mode. A gyroscope measures and maintains that orientation.

A policy that defines rules regarding using a company network, data, and a specific application.

Changes made to a monitored file or folder cannot be changed even by an administrator unless the administrator takes ownership and adds the appropriate access control entities.

An access control list relates to the permissions for a specific object such as what is allowed to be done to the object (such as a file or directory) by particular users or operating system processes. A means of providing a security filter where traffic is allowed or denied based on configured parameters.

Notifies the user that he or she must have specific security rights or be logged on as an administrator.

A component of a wireless network that accepts associations from wireless network cards.

In Active Directory, select the group you want to create the account in and use the Action > New menu option.

In Active Directory, locate the user name you want to delete, right-click on it, and select Delete.

Settings required when putting a thick client or thin client onto a network.

See access control list.

Technology that allows the motherboard and operating system to control the power needs and operation modes of various devices.

A timer for the Windows operating system. When creating an image, a technician must reset or re-arm the activation clock if a single activation key is used. This gives a 30-day (Windows 7) or 90-day (Windows 8/10) grace period before having to re-enter the product key.

A service used on Microsoft Windows Server to manage network accounts and devices.

An effective communication technique that ensures what the speaker says is accurately received.

A troubleshooting tool in a macOS system that sees what processes and services are running, as well as what system resources are used.

A type of wireless configuration in which two 802.11 wireless devices can make a wireless network without the use of an access point.

Enables two 802.11 wireless devices to communicate directly without the use of a wireless access point or a wireless router.

An electronic circuit card that inserts into an expansion slot. Also called a controller, card, controller card, circuit card, circuit board, and adapter board.

An extension or plug-in that provides to a browser additional features such as a toolbar or the capability to dim everything on the screen except for a running video. Add-ons can also cause security risks.

A video adapter added even if the motherboard has onboard video and integrated video ports.

Right-click inside unallocated space of a drive > New Spanned Volume or New Striped Volume > select another drive to be added> select a drive letter and file system.

Ensure that the drive is recognized by the BIOS and create a partition and format for a particular file system.

A feature found on some scanners and printers that is used to feed multiple pages into the device.

A scanner that has the added feature of having an automatic document feeder (ADF) to allow multiple pages to be fed or input into the scanner.

See Windows Assessment and Deployment Kit.

A security function in Windows that requires elevated security rights in order to execute specific commands. Use the Run as administrator option if blocked.

A share created by Microsoft for drive volumes and the folder that contains the majority of Windows files. An administrative share has a dollar sign at the end of its name.

A person responsible for setting up and maintaining a system, such as a Windows computer. Logging in as an administrator allows settings to be changed that may not be allowed for other users.

A type of digital subscriber line (DSL) that provides speeds up to 150 Mb/s; it provides faster downloads than uploads.

A Windows boot menu used to access tools used for troubleshooting. Press F8 key when the computer is booting (and before Windows loads) to access the Advanced Boot Options menu.

A look and feel for the computing environment in Windows 7 that includes transparent icons, animations, and customized desktop gadgets.

Used in wireless networks and offers encryption with 128-bit, 192-bit, and 256-bit encryption keys.

A set of rules for file services on an Apple device that uses macOS. AFP uses port 548.

An extension of the PCI bus (a port) that provides a dedicated communication path between the expansion slot and the processor. AGP is used for video adapters.

One mode of operation for SATA drives, which enables SATA devices to be inserted or removed when power is applied and communication exists between the host controller and attached SATA devices.

The air filter or mask should be used whenever dust, airborne particles, or debris could cause personal issues. An air filter might also be used in an area where the air quality is not appropriate for a computer or networking equipment.

Something in the air, such as dust, that could potentially be a problem for a technician.

Enables users to disable all wireless communication but still view a movie or play a game that does not require Internet connectivity.

An Apple print server.

A character that can be a letter of the alphabet (uppercase or lowercase), a digit from 0 through 9, or a punctuation mark or symbol, such as @, #, or !.

A method of configuring IPv4 parameters that will be used if the main IPv4 parameters (such as DHCP) cannot be used or are impractical to use. A good use of an alternative configuration is when a laptop is used both at work and at home. At work, DHCP could be configured, but at home, the alternative configuration might contain a statically assigned IP address.

A method of assigning an IP address used when the DHCP server is down or the server could not assign an IP address, such as when there are network problems.

The part of a processor that does mathematical manipulations.

(Advanced Micro Devices)
A company that makes processors, graphics processors, and chipsets. AMD is the largest rival of Intel for PC processors.

Increasing the strength of a sound. Amplification output is measured in watts. Sound cards usually have built-in amplification to drive the speakers. Many speakers have built-in amplifiers to boost the audio signal for a fuller sound.

Used mainly by older video ports, modems, and sound devices; its signal strength varies in amplitude.

Used with two or more conditions and returns true only if all expressions are true.