Τεχνικός Υπολογιστών CompTIA A+

From a Windows command prompt, the two dots (..) represent the parent directory.

A file extension used with a batch file (a file that has multiple commands that, when executed, run one after another). See also batch file.

A file extension used with JavaScript files.

Used for the cross-platform version of Windows PowerShell.

A file extension used for a PowerShell script.

A file extension used with Python scripts.

An extension used with a shell script or a text file that has a sequence of commands for a Unix-based system.

A file extension for VBScript files.

A voltage level from the power supply that is used for drive motors, CPU, internal cooling fans, and the graphics card.

A voltage level from the power supply that is used for electronics, the motherboard, adapters, ports, and peripherals.

A storage device form factor.

A hard drive speed. The faster the drive RPM, the faster the transfer rate.

Some power supplies accept 120 V (listed as 115 V on the certification) or 220 V power from an electrical outlet.

A hard drive speed. The faster the drive RPM, the faster the transfer rate.

A common frequency used for 802.11 wireless networks.

A storage device form factor.

A storage device form factor.

Main ATX motherboard power connector.

A storage device form factor.

A device that has a processor that can handle 32 bits at one time.

A type of printer used to create 3D solid objects out of various materials, including plastic, metal, clay, and ceramics.

Third generation of wireless cellular technology that allowed mobile devices to have faster Internet connectivity.

Fourth generation of cellular network that supports IP telephony, gaming services, mobile TV, and video conferencing at speeds up to 1 Gb/s.

A common frequency used for 802.11 wireless networks.

A hard drive speed. The faster the drive RPM, the faster the transfer rate.

A modem that produces higher transmission speeds and uses traditional phone lines. Actual modem speed is determined by the number of analog-to-digital conversions that occur through the phone system.

An ANSI/TIA/EIA Ethernet network cabling standard.

Fifth generation of cellular networks that does not have formal standards yet; supports speeds up to 10 Gb/s.

A device that has a processor that can handle 64bits at one time.

A hard drive speed. The faster the drive RPM, the faster the transfer rate.

An IEEE wireless standard that used the 5 GHz range and had speeds up to 54 Mb/s.

An IEEE wireless standard that uses the 5 GHz range and supports speeds up to 4.9 Gb/s.

The first IEEE wireless standard to hit the market; used the 2.4 GHz range and supported speeds up to 11 Mb/s.

An IEEE wireless standard that was an upgrade to 802.11b and was backward compatible with it; used the 2.4 GHz range and had speeds up to 54 Mb/s.

An IEEE wireless standard that uses both the 2.4 and 5 GHz ranges and that supports speeds up to 600 Mb/s.

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.