Comptia A+ Core 1

Authentication, Authorization, and Accounting

AAA

Alternating Current is an electric current that reverses direction periodically, characterized by a sinusoidal waveform. Unlike direct current (DC), where the flow of electric charge is only in one direction, AC allows for more efficient transmission of electrical energy over long distances and is commonly used in power supply and household electrical systems.

AC

An Access Control List (ACL) is a list of permissions attached to an object in a computing environment, such as a file or directory. It specifies which users or system processes are granted access to certain resources, as well as what operations they can perform on those resources, such as read, write, execute, or delete.

ACL

ACPI stands for Advanced Configuration and Power Interface. It is an open industry specification that allows operating systems to discover and configure computer hardware components, enabling features such as power management, system configuration, and the ability to control the power state of devices. ACPI plays a crucial role in reducing power consumption and providing various power states, like sleep and hibernate, while ensuring efficient resource management by the OS.

ACPI

ADF stands for Automatic Document Feeder, a device feature that allows multiple pages to be fed into a scanner or copier automatically, enabling efficient document processing without manual intervention.

ADF

Advanced Encryption Standard, a symmetric encryption algorithm widely used for securing data.

AES

Accelerated Graphics Port, a high-speed point-to-point channel for connecting graphics cards to a computer's motherboard, allowing faster data transfer rates than traditional PCI.

AGP

Access Point, a device that allows wireless devices to connect to a wired network using Wi-Fi or other standards.

AP

Application Programming Interface, a set of rules and protocols for building software applications that allows different programs to communicate with each other.

API

Apple File System, designed for macOS and iOS, optimized for flash storage and SSDs, providing features like strong encryption and space efficiency.

APFS

Automatic Private IP Addressing, a feature that allows a device to assign itself an IP address when a DHCP server is not available.

APIPA

Android Package Kit, a file format used to distribute and install applications on Android devices.

APK

Advanced RISC (Reduced Instruction Set Computer) Machine, architecture used in mobile devices and embedded systems, known for its power efficiency and performance.

ARM

Address Resolution Protocol

ARP

Advanced Technology Attachment, an interface standard for connecting storage devices like hard drives and SSDs to a computer.

ATA

Asynchronous Transfer Mode, a high-speed networking technology that uses fixed-size cells for data transmission, primarily used in telecommunications.

ATM

Advanced Technology Extended

is a motherboard form factor that defines the dimensions, mounting points, power connections, and other specifications for computer motherboards.

ATX

Acceptable Use Policy, a set of rules and guidelines that outlines the acceptable behaviors and practices for using an organization's network and resources.

AUP

Antivirus

AV

Basic Input/Output System, a firmware interface that initializes hardware during the booting process and provides runtime services for operating systems.

BIOS

Blue Screen of Death, an error screen displayed on Windows systems when a fatal system error occurs, preventing the operating system from continuing to run.

BSOD

Bring Your Own Device, a policy that allows employees to use their personal devices for work purposes, enhancing flexibility and productivity.

BYOD

Certificate Authority, an entity that issues digital certificates to verify the identity of organizations and individuals in electronic transactions.

CA

Container as a Service, a cloud service model that allows users to manage and deploy containers without needing to manage the underlying infrastructure.

CaaS

Computer-Aided Design, a technology used for creating precision drawings and technical illustrations in various fields such as engineering and architecture.

CAD

Completely Automated Public Turing Test to Tell Computers and Humans Apart,a security measure used to determine whether a user is human or a bot by presenting challenges that are easy for humans but difficult for automated systems.

CAPTCHA

Compact Disc

CD

Compact Disc File System

CDFS

Code Division Multiple Access

CDMA

Computer Emergency Response Team

CERT

Common Internet File System

CIFS

Command Prompt

CMD

Complementary Metal Oxide Semiconductor

CMOS

Canonical Name

CNAME

Central Processing Unit

CPU

Certificate Revocation List

CRL

Data as a Service

DaaS

Database as a Service

DBaaS

Direct Current

DC

Distributed Denial of Service

DDoS

Double Data RateD

DDR

Dynamic Host Configuration Protocol

DHCP

Dual Inline Memory Module

DIMM

Domain Keys Identified Mail

DKIM

Direct Memory Access

DMA

Domain-based Message Authentication, Reporting, and Comformance

DMARC

Domain Name System

DNS

Denial of Service

DoS

Disaster Recovery as a Service

DRaaS

Dynamic Random Access Memory

DRAM

Digital Rights Management

DRM

Digital Subscriber Line

DSL

Digital Visual Interface

DVI

Digital Visual Interface - Digital

DVI-D

Error Correcting Code

ECC

Encrypting File System

EFS

Electromagnetic Interference

EMI

Embedded Multimedia Card

eMMC

End of Life

EOL

External Serial Advanced Technology Attachment

eSata

Electrostatic Discharge

ESD

End-User License Agreement

EULA

Externsible File Allocation Table

exFAT

Extended File System

ext

File Allocation Table

FAT

12-bit File Allocation Table

Fat12

16-bit File Allocation Table

Fat16

32-bit File Allocation Table

Fat32

Front-Side Bus

FSB

File Transfer Protocol

FTP

File Transfer Protocol SFTP

FTPS

Graphics DDR

GDDR

Grandfather-Father-Son

GFS

Global Positioning System

GPS

GUID (Globally Unique Identifier) Partition Table

GPT

Graphics Processing Unit

GPU

Global System for Mobile Communications

GSM

Graphical User Interface

GUI

Globally Unique Identifier

GUID

Hardware Abstraction Layer

HAL

Hardware-assisted Virtualization

HAV

Hardware Compatibility List

HCL

High-Bandwidth Digital Content Production

HDCP

Hard Disk Drive

HDD

High Definition Multimedia Interface

HDMI

Hybrid Hard Drive

HHD

Hardware Security Module

HSM

Hypertext Markup Language

HTML

Hypertext Transfer Protocol

HTTP

Hypertext Transfer Protocol Secure

HTTPS

Input/Output

I/O

Infrastructure as a Service

IaaS

Intelligent Character Recognition

ICR

Internet Message Control Protocol

ICMP

Integrated Drive Electronics

IDE

Institute of Electrical and Electronics Engineers

IEEE

Internet Mail Access Protocol

IMAP

Input/Output Operations per Second

IOPS

Internet of Things

IoT

Internet Protocol

IP