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COMPTIA A+ / ACRONYMS Learn the language of IT.
Connect each term to a task.

Use the reference tables to review hardware, networking, and security terms in context.

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CompTIA A+ Acronyms: Complete 2026 Study List

The CompTIA A+ exam is packed with acronyms — over 200 across Core 1 and Core 2. Knowing what each acronym stands for is only half the battle; you need to understand what it does, when it's used, and how it relates to other technologies. This comprehensive guide organizes every essential A+ acronym by domain with explanations, exam tips, and memorization strategies.

Plan your next step

CompTIA's official objectives list approximately 200+ acronyms across both exams. Focus on the most common ones first: RAM, CPU, BIOS, UEFI, POST, TCP/IP, DHCP, DNS, HTTP/HTTPS, and VPN. Understanding what they mean matters more than memorizing definitions.

Acronyms are the language of IT, and the CompTIA A+ exam expects you to be fluent. While memorizing 200+ acronyms might seem daunting, this guide organizes them by category and provides proven memorization strategies. Focus on understanding what each technology does—this makes remembering the acronym much easier than rote memorization.

Current A+ exam and policy guidance

A+ V15 uses 220-1201 and 220-1202. Both exams must be from the same version. Each allows up to 90 questions in 90 minutes; Core 1 requires 675/900 and Core 2 requires 700/900. Study schedules and preparation budgets on this page are planning examples, not guaranteed outcomes or current price quotes.

Checked September 8, 2026: Core 1 · Core 2 · Retake policy · Scoring policy · Renewal fees.

Hardware Acronyms (Core 1 — 25% Weight)

Hardware acronyms form the foundation of the A+ Core 1 exam. You'll encounter these in multiple-choice questions and performance-based questions involving hardware troubleshooting and installation.

RAM — Random Access Memory
ROM — Read-Only Memory
CPU — Central Processing Unit
GPU — Graphics Processing Unit
SSD — Solid State Drive
HDD — Hard Disk Drive
BIOS — Basic Input/Output System
UEFI — Unified Extensible Firmware Interface
PSU — Power Supply Unit
DIMM — Dual In-line Memory Module
SO-DIMM — Small Outline DIMM (laptops)
PCIe — Peripheral Component Interconnect Express
SATA — Serial Advanced Technology Attachment
NVMe — Non-Volatile Memory Express
M.2 — Next Generation Form Factor
POST — Power-On Self-Test
TPM — Trusted Platform Module
HSM — Hardware Security Module

Hardware Acronyms

Processing and Memory: CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read-Only Memory), BIOS (Basic Input/Output System), UEFI (Unified Extensible Firmware Interface), POST (Power-On Self-Test). Storage: HDD (Hard Disk Drive), SSD (Solid State Drive), NVMe (Non-Volatile Memory Express), SATA (Serial ATA), RAID (Redundant Array of Independent Disks). Connections: USB (Universal Serial Bus), HDMI (High-Definition Multimedia Interface), PCIe (PCI Express).

Interface Acronyms

VGA, DVI, DisplayPort are display connections. SATA, NVMe, PCIe are storage/expansion interfaces.

Networking Acronyms (Core 1 — 23% Weight)

Networking questions account for a significant portion of Core 1. You must understand both the acronym definition and how each protocol or technology functions in a network environment.

TCP — Transmission Control Protocol
UDP — User Datagram Protocol
IP — Internet Protocol
DNS — Domain Name System
DHCP — Dynamic Host Configuration Protocol
NAT — Network Address Translation
LAN — Local Area Network
WAN — Wide Area Network
VPN — Virtual Private Network
MAC — Media Access Control
VLAN — Virtual Local Area Network
SNMP — Simple Network Management Protocol
FTP/SFTP — File Transfer Protocol (Secure)
SSH — Secure Shell
RDP — Remote Desktop Protocol
SMTP — Simple Mail Transfer Protocol

Networking Acronyms

Protocols: TCP/IP (Transmission Control Protocol/Internet Protocol), UDP (User Datagram Protocol), DHCP (Dynamic Host Configuration Protocol), DNS (Domain Name System), NAT (Network Address Translation). Web/Email: HTTP/HTTPS (Hypertext Transfer Protocol), FTP (File Transfer Protocol), SMTP (Simple Mail Transfer Protocol), POP3/IMAP (email protocols). Infrastructure: LAN, WAN, VLAN, VPN, NIC.

Common Ports

Associate acronyms with their ports: HTTP (80), HTTPS (443), FTP (21), SSH (22), DNS (53), DHCP (67/68).

Storage & RAID Acronyms

RAID configurations are heavily tested on both Core 1 and Core 2. Understanding the differences between RAID levels and when to use each is critical for exam success.

RAID — Redundant Array of Independent Disks
NAS — Network Attached Storage
SAN — Storage Area Network
DAS — Direct Attached Storage
NTFS — New Technology File System
FAT32 — File Allocation Table (32-bit)
ext4 — Fourth Extended Filesystem (Linux)
APFS — Apple File System

Security & Operating System Acronyms (Core 2)

Core 2 emphasizes security concepts and operating system management. These acronyms appear in troubleshooting scenarios and configuration questions.

MFA — Multi-Factor Authentication
UAC — User Account Control
GPO — Group Policy Object
ACL — Access Control List
AES — Advanced Encryption Standard
BitLocker — Full Disk Encryption (Windows)
EFS — Encrypting File System
PKI — Public Key Infrastructure

Security Acronyms

Authentication: MFA (Multi-Factor Authentication), SSO (Single Sign-On), ACL (Access Control List), UAC (User Account Control). Encryption: AES (Advanced Encryption Standard), SSL/TLS (Secure Sockets Layer/Transport Layer Security), PKI (Public Key Infrastructure), TPM (Trusted Platform Module). Threats: DDoS (Distributed Denial of Service), XSS (Cross-Site Scripting), MITM (Man-in-the-Middle).

Protection Systems

IDS (Intrusion Detection System), IPS (Intrusion Prevention System), EDR (Endpoint Detection and Response).

Cloud & Virtualization Acronyms (Core 1 — 11% Weight)

IaaS — Infrastructure as a Service
PaaS — Platform as a Service
SaaS — Software as a Service
VM — Virtual Machine
VDI — Virtual Desktop Infrastructure
DaaS — Desktop as a Service

How to Study A+ Acronyms Effectively

With 200+ acronyms, a systematic approach is essential. Here are proven strategies used by candidates who passed on their first attempt:

  1. Group by domain: Study hardware acronyms one week, networking the next. Grouping related acronyms creates mental associations that improve recall. When you learn DHCP, also review DNS, NAT, and other networking protocols in the same session.
  2. Use spaced repetition: Apps like Anki use algorithms to show you cards right before you'd forget them. Start with 15-20 new acronyms daily, reviewing all previous cards first. Within 3-4 weeks, you'll have all 200+ committed to long-term memory.
  3. Learn the function, not just the name: Create flashcards with the acronym on one side and both the full name AND a one-sentence functional description on the other. "DHCP — Dynamic Host Configuration Protocol — Automatically assigns IP addresses to devices joining a network."
  4. Practice in context: After memorizing definitions, practice with exam-style questions that use acronyms in scenarios. This bridges the gap between recognition and application, which is what the real exam tests.
  5. Build acronym chains: Connect related acronyms into stories. "A packet travels from the NIC through the LAN, gets a NAT translation at the router, crosses the WAN via VPN, and reaches the DNS server." These narrative chains are far more memorable than isolated definitions.

Acronym Study Strategy

Understanding what a technology does makes its acronym memorable. For example, knowing that DHCP automatically assigns IP addresses (Dynamic Host Configuration Protocol) is more useful than memorizing letters. Focus first on acronyms that appear frequently in practice exams. Learn acronyms in contextual groups—networking together, hardware together, etc.

Priority-Based Learning

High-frequency acronyms like TCP/IP, DNS, DHCP, RAM, CPU, and BIOS should be second nature before moving to less common ones.

Memorization Techniques

Create flashcards with the acronym on one side and meaning plus explanation on the other. Use spaced repetition apps like Anki. When studying a concept, always use its acronym—think "DHCP assigns IPs" rather than "the automatic IP thing." Create memorable phrases for related acronyms like OSI layers: "Please Do Not Throw Sausage Pizza Away."

Daily Practice

Spend 10-15 minutes daily reviewing acronym flashcards. Review during dead time—commutes, waiting rooms, coffee breaks.

Common Acronym Traps on the A+ Exam

CompTIA intentionally tests acronyms that are easily confused. Watch out for these common traps:

Test Your Acronym Knowledge

Our Smart Practice practice tests include questions that test both acronym recognition and functional understanding — just like the real exam.

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Facts and planning estimates

Official Acronyms
200+
High-Priority
~75
Networking
~50
Security
~40

Put the guide into practice

  1. Download the Official List

    CompTIA includes an acronym list with the exam objectives. Download and print this as your master reference.

    Highlight acronyms you already know to see your starting point and track progress.

  2. Categorize by Familiarity

    Sort acronyms into Already Know, Somewhat Familiar, and Unknown. Focus on the Unknown group.

    The Somewhat Familiar group often needs just one or two reviews to become solid.

  3. Learn in Context

    As you study each topic, actively note its associated acronyms.

    Write acronyms by hand—physical writing improves memory more than typing.

  4. Daily Flashcard Practice

    Spend 10-15 minutes daily reviewing acronym flashcards with spaced repetition.

    If you can explain what something does, you'll remember its acronym naturally.

Study tips

Common mistakes to avoid

Study perspective

Students who understand what technologies do never struggle with acronyms. Focus on learning the concept first—the acronym becomes obvious. If you know DNS translates website names to IP addresses, "Domain Name System" makes perfect sense.

Practice with Real Exam Questions

Test your acronym knowledge with practice questions that use them in context.

Start Free Practice

Frequently Asked Questions

How many acronyms do I need to know for the CompTIA A+ exam?

CompTIA's official acronym list contains approximately 200+ acronyms across both Core 1 and Core 2. You don't need to memorize every single one, but you should be comfortable with the 80-100 most commonly tested acronyms covering hardware, networking, security, and operating systems.

What are the most commonly tested A+ acronyms?

The most frequently tested acronyms include RAM, CPU, BIOS/UEFI, RAID (0, 1, 5, 10), TCP/IP, DNS, DHCP, VPN, SSD, NVMe, SATA, and DIMM for Core 1. For Core 2, focus on GPO, UAC, BitLocker, NTFS, ext4, SSH, RDP, and MFA. These appear in multiple question types including PBQs.

What's the best way to memorize A+ acronyms?

Use spaced repetition flashcard apps like Anki or Quizlet. Study 15-20 acronyms per day, reviewing previous days' cards before adding new ones. Group acronyms by category (hardware, networking, security) for better retention. Creating your own flashcards is more effective than using pre-made decks because the act of writing reinforces memory.

Do I need to know what every acronym stands for on the exam?

You need to know both what the acronym stands for AND what it does. For example, knowing DHCP means Dynamic Host Configuration Protocol isn't enough — you must understand that it automatically assigns IP addresses to devices on a network. Exam questions test functional understanding, not just definitions.

Are the same acronyms tested on both Core 1 and Core 2?

Some acronyms appear on both exams (TCP/IP, DNS, VPN), but each exam emphasizes different categories. Core 1 focuses heavily on hardware acronyms (DIMM, NVMe, SATA, PCIe) and networking (DHCP, DNS, NAT). Core 2 emphasizes security (MFA, UAC, BitLocker) and operating system acronyms (GPO, NTFS, ext4).

Will acronyms appear in performance-based questions?

Yes, PBQs frequently use acronyms without defining them. You might be asked to configure a RAID array, set up DHCP scope options, or troubleshoot DNS resolution — all assuming you know what these acronyms mean and how the technologies work. This is why functional understanding matters more than rote memorization.

How many acronyms are on the CompTIA A+ exam?

The official exam objectives list over 200 acronyms across both exams. Focus on understanding function rather than memorizing definitions.

Will I be tested on acronym definitions directly?

Rarely. The exam tests your understanding of technologies. You'll see "Which protocol assigns IP addresses?" rather than "What does DHCP stand for?"

Which acronyms are most important to know?

High-priority: CPU, RAM, ROM, BIOS, UEFI, POST, TCP/IP, UDP, DHCP, DNS, HTTP/HTTPS, VPN, VLAN, SSD, HDD, NVMe, AES, SSL/TLS, MFA, RAID.

How should I study acronyms efficiently?

Learn acronyms in context as you study topics rather than as a separate memorization exercise. Use flashcards with spaced repetition.

Can I bring an acronym cheat sheet to the exam?

No, but you receive scratch paper where many candidates write down critical acronyms and port numbers at the start.

What's the best flashcard app for acronyms?

Anki is highly recommended for its spaced repetition algorithm. Quizlet is another popular option with pre-made A+ decks.

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