CompTIA A+ Certification: Complete Study Guide

CompTIA A+ Certification: What It Is and Who Needs It

CompTIA A+ certification is the industry-standard entry-level IT credential that validates foundational skills in hardware, networking, operating systems, and security. Earning it requires passing two exams, Core 1 (220-1101) and Core 2 (220-1102), for a combined cost of $506. More than one million IT professionals worldwide hold an active A+ certification, according to CompTIA, making it the most widely recognized starting point for help desk, desktop support, and junior systems administrator roles.

The certification is vendor-neutral, meaning it covers troubleshooting and configuration across Microsoft, Apple, and Linux systems rather than a single manufacturer's products. That breadth is why employers across healthcare, finance, government, and technology accept it as proof of baseline technical competency, and why it also satisfies U.S. Department of Defense Directive 8140 requirements for Information Assurance Technical (IAT) Level I positions.

Why Employers Prioritize A+ Certification

Employers use A+ certification to confirm a candidate can handle hardware, networking, and security tasks without extensive on-the-job training. According to CompTIA's 2026 Employer Perception Study, 91% of hiring managers said certifications are important or very important when evaluating candidates for technical support roles.

Government agencies and defense contractors go further and require A+ for certain positions because it satisfies DoD Directive 8140 compliance standards for technical support and cyber defense roles, giving certified candidates a direct path into federal employment. According to the U.S. Bureau of Labor Statistics, the field projects 6% employment growth for computer support specialists through 2032. Entry-level A+ certified technicians typically start at $40,000 to $55,000 annually, and experienced professionals in junior systems administrator roles earn $65,000 to $75,000, with major metros such as San Francisco, New York, Seattle, and Washington, D.C. paying 25% to 40% above national averages.

Core 1 Exam (220-1101): Hardware and Networking

Core 1 tests hardware configuration, networking fundamentals, mobile device support, virtualization, and systematic troubleshooting. The exam runs 90 minutes with up to 90 questions in multiple-choice, multiple-response, drag-and-drop, and performance-based simulation formats. The passing score is 675 on a 100-900 scale.

Core 1 domain weighting:

• Hardware and Network Troubleshooting (29%): Diagnosing hardware failures, network connectivity issues, printer problems, and mobile device malfunctions using CompTIA's six-step troubleshooting process.
• Hardware (25%): Cable and connector types (SATA, NVMe, Thunderbolt, USB-C), RAM, storage including NVMe SSDs and RAID, motherboards, CPU sockets, power supplies, and printer technologies.
• Networking (20%): TCP/IP, network types (LAN, WAN, PAN, MAN, WLAN), Wi-Fi 6 and Wi-Fi 6E, DNS and DHCP, and SOHO router configuration with security hardening.
• Mobile Devices (15%): Laptop hardware installation, mobile connectivity protocols, iOS and Android synchronization, and mobile accessories.
• Virtualization and Cloud Computing (11%): Virtual machines, hypervisors, IaaS, PaaS, SaaS, and virtual desktop infrastructure.

Troubleshooting is the largest single domain at 29%. Candidates who build or disassemble an actual computer before test day tend to score higher on hardware simulation questions than those who study diagrams alone.

Core 2 Exam (220-1102): Operating Systems and Security

Core 2 covers operating system administration, security implementation, software troubleshooting, and operational procedures, the skills used daily in IT support work. The passing score is 700 on a 100-900 scale, 25 points higher than Core 1, with the same 90-minute, 90-question format.

Core 2 domain weighting:

• Operating Systems (31%): Windows 10 and 11 installation and administration, macOS and Linux basics, command-line tools (cmd.exe, PowerShell, Terminal), disk management, file systems (NTFS, FAT32, ext4), and Microsoft 365.
• Security (25%): Physical controls (badge readers, locks, cameras), logical controls (access control lists, least privilege), wireless security (WPA3, WPA2), malware types, social engineering recognition, browser security, secure data destruction, and password management.
• Software Troubleshooting (22%): Diagnosing Windows issues via Event Viewer and system logs, malware removal, mobile device troubleshooting, and application compatibility.
• Operational Procedures (22%): Documentation and ticketing, change management, disaster recovery, safety procedures, privacy regulations including GDPR and CCPA, and basic scripting.

The security domain has grown with each A+ revision, reflecting how often IT support staff are the first to spot a security incident. Recognizing a phishing attempt and understanding how encryption protects data are both tested on Core 2 and used constantly in real IT support work.

Study Resources That Work

First-time pass rates average 68% for Core 1 and 72% for Core 2, according to CompTIA's certification analytics, but candidates who complete structured study with hands-on labs report pass rates above 85%. Performance-based questions make up 15% to 20% of each exam and require completing an actual task, not recalling a fact.

CompTIA's own A+ Exam Objectives document is free and the most underused resource available. Treat it as a checklist, not background reading. CompTIA CertMaster Learn ($329 per exam) and CertMaster Practice ($99 per exam) are the official paid options. Professor Messer's free video courses cover every objective in over 20 hours of instruction per exam and remain the strongest zero-cost option, while paid practice exams from Jason Dion ($20-$30 per exam) and Mike Meyers' course ($20-$200) are widely used for question-format practice.

A home lab is the single biggest factor in passing performance-based questions. Use old hardware or VirtualBox/VMware to practice installing Windows 10/11 and Linux from ISO, configuring a SOHO router with WPA3 encryption, running PowerShell and cmd.exe tasks, and removing malware using safe mode and system restore.

A+ Security Skills: A Foundation for a Cybersecurity Career

Core 2's security domain covers the daily security work of IT support staff: malware remediation, access control, physical security, social engineering defense, and data protection. The FBI's Internet Crime Complaint Center (IC3), the bureau's portal for reporting cybercrime, reported cybercrime losses exceeding $12.5 billion in recent years, with small and medium businesses representing a disproportionate share of targeted attacks.

Skills from A+ preparation that carry directly into daily IT work:

• Malware remediation: identifying viruses, worms, trojans, ransomware, spyware, and rootkits, removing them with safe mode and system restoration, and preventing reinfection through patching and hardening.
• Access control: least-privilege permissions, multi-factor authentication, password policy management, and access log auditing.
• Physical security: badge readers, biometric authentication, server room cameras, cable locks, and secure equipment disposal.
• Social engineering defense: recognizing phishing, vishing, tailgating, and pretexting.
• Data protection: encryption at rest (BitLocker, FileVault), TLS/SSL in transit, and secure data disposal.

This foundation is also what prepares IT professionals for CompTIA Security+, which goes deeper into vulnerability management and cyber risk. Professionals moving toward endpoint detection and response (EDR) and managed detection tools build on this same base.

Career Paths and Salary Ranges After A+ Certification

A+ opens four entry tracks: help desk technician, desktop support specialist, field service technician, and junior systems administrator. Entry-level pay runs $40,000 to $55,000, and experienced junior admins earn $65,000 to $75,000. It also serves as the starting point for longer paths: A+ then Network+ then CCNA toward network security, A+ then Security+ then CySA+ or Certified Ethical Hacker (CEH) toward security analyst or penetration testing roles, A+ then Network+ then Cloud+ or an AWS/Azure credential toward cloud administration, and A+ then Project+ then ITIL Foundation toward IT management.

According to CompTIA's certification holder survey, 73% of A+ holders pursue an additional certification within three years, most commonly Security+ (42%), followed by Network+ (31%) and vendor-specific credentials from Microsoft, Cisco, or AWS (27%). Readers who want to extend these skills into personal security practice can review Bellator's personal cybersecurity guides.

Maintaining Your A+ Certification: CEU Requirements

A+ certification is valid for three years and requires 20 Continuing Education Units (CEUs), the credit system CompTIA uses to track ongoing training, to stay active. Earning Network+ or Security+ (50 CEUs each) automatically renews A+ and every lower-level CompTIA certification, and it's the path 56% of A+ holders use. Other approved routes include CompTIA CertMaster CE courses, conference attendance such as RSA Conference, Black Hat, or DEF CON (up to 10 CEUs per event), and documented IT employment through CompTIA's CE portal (5 CEUs per year of verified work). A single-payment CE renewal option, $49 to $89 per year depending on certification level, covers multiple CompTIA credentials at once.

For most A+ holders, earning Security+ within three years is the simplest path: it clears the 20-CEU requirement several times over, renews A+ automatically, and adds a higher-value credential that opens DoD 8140 IAT Level II roles.

Is CompTIA A+ Worth It in 2026?

For anyone targeting an IT support career, yes. Universal employer recognition, DoD 8140 compliance value, a clear path to higher certifications, and a security curriculum built around real threats make A+ the most practical entry credential available. The $506 total exam cost is modest against the salary gains and the roles it opens.

A+ fits four groups best: people new to IT who need a formal credential for a first job, career changers moving into technical support, military or government personnel who need DoD 8140 compliance, and working IT support staff who want to validate skills they already use daily.