Τεχνικός Υπολογιστών CompTIA A+

A connection between hardware devices and parts of the operating system.

A serial device setting that enables either the sending or the receiving device to send data, one device at a time. On a cable, the capability to transmit in both directions but not at the same time.

The method by which two serial devices negotiate communications.

A sealed data storage medium on which information is stored. Also called a hard disk.

Data sent to and stored on a PC’s hard drive.

Describes turning a device off and back on or a factory reset of a mobile device.

A tangible, physical item, such as the keyboard or monitor.

A physical device used to gain access to a resource such as a file or company.

A required feature of Microsoft’s Windows Virtual PC and Hyper-V. This feature is available on some computers and can be enabled or disabled through the system BIOS.

A list of devices that is compatible with a particular operating system.

(High-bandwidth Digital Content Protection) A technology used to prevent copying of audio and video discs as the data travels through a video port such as a DP, DVI, or HDMI port.

A mechanical drive with metal platters used to store data.

An upgraded digital interface that carries audio and video over the same cable.

Occurs when a read/write head touches a platter in a mechanical hard drive, causing damage to the heads or the platter.

A mobile wearable device that commonly has a microphone and headphones.

A metal device for cooling the processor by conducting heat to its fins or bars. Convection then transfers the heat away by flowing air through the case.

Aluminum or copper fittings on memory modules used to dissipate heat.

A command used to list all of the available commands.

A measurement of electrical frequency equal to 1 cycle per second. Abbreviated Hz.

A six-core processor.

A type of file system used with Apple computers that has been upgraded to HFS+ and then later upgraded to Apple File System (APFS).

A low-power state used in computing devices that saves information in RAM to non-volatile memory such as a hard drive or flash media.

A share that has a dollar sign ($) added to the share name so that the share is not shown to a remote networked computer.

A situation in which a mobile device is slow to respond due to applications taking all the memory and processor power.

A process that sets up the file system for use by the computer. It is the third and last step in preparing a hard drive for use.

Software on a device used to detect malicious activity.

A network folder that allows users to store their files and have access to them from any device that they log onto within the same domain.

A server commonly used to act as a web server and print server, control home devices, manage backups, and be accessed from outside the home. A home server commonly includes the capability to stream sound or video, share files, have a Gigabit NIC, or have a RAID hard drive array.

A Windows 7 and higher feature to make home networking easier to configure and join. HomeGroups were removed from Windows 10 (Version 1803) and later versions.

Occurs in a laser printer; may be due to insufficient toner levels in the cartridge.

Another name for a network device. It also represents a part of an IP address. An IP address has a network portion and a host portion.

A portion of an IP address that represents the specific network device.

In a virtualization environment, the real computer.

Software that has one or more files that fix a particular software problem. Contrast this to a patch or a service pack.

Describes hardware that can be installed while power is applied.

Inserting adapters into a slot or attaching or unattaching devices while the computer is powered.

A wireless network that has free Internet access. Security is a concern because no encryption or authentication is commonly required.

A hidden part of the hard drive that is used to reinstall the operating system. It sometimes contains applications that installed when the computer was sold. Using an HPA reduces the amount of hard drive space available to the operating system.

An old file system used with IBM OS/2 computers.

See Hyper-Threading.

A programming language used to create Internet web pages.

A computer used to control devices contained in a home theater, such as the speaker system, TV, and video recorder.

A standard for Internet data communication.

HTTP communication encrypted through an SSL session. With HTTPS, web pages are encrypted and decrypted.

A device used with the universal serial bus or in a star network topology that allows multiple device connections. A network hub cannot look at each data frame coming through its ports like a switch does. It forwards data frames (packets) to all ports.

The amount of moisture is in the air. The potential for an electrostatic discharge (ESD) event is higher when the humidity is low.

A type of cloud technology in which the company has some cloud services maintained by internal staff (private cloud) and some cloud services that are outsourced (public cloud).

A storage device that uses two technologies: a mechanical hard drive and flash memory used as an SSD.

A drive that has two parts: a mechanical hard drive as well as flash memory used as an SSD.

A technology created by Intel that is an alternative to using two processors. HT allows a single processor to handle two separate sets of instructions simultaneously.