CompTIA A+ 220-1101 Study Guide 2026: Pass Core 1 First Try

What is A+ 220-1101?

CompTIA A+ Core 1 (exam code 220-1101) is the first of two exams that together earn the A+ certification. It is the de facto entry-level IT credential and is required or strongly preferred for help desk, desktop support, and field service technician roles across the industry.

Core 1 covers the hardware and networking foundation: mobile devices, networking, hardware components, virtualization & cloud computing, and hardware/network troubleshooting. Core 2 (220-1102) builds on top with operating systems, security, software troubleshooting, and operational procedures. You must pass both within 12 months to earn the certification.

Exam Details

Five Domains Breakdown

Domain 1: Mobile Devices (15%)

• Laptop hardware: keyboards, batteries, RAM, SSDs, displays
• Display types: OLED, IPS, TN, in-plane vs OLED tradeoffs
• Mobile OS features: iOS, Android, sync, backup
• Accessories: docks, USB-C, Thunderbolt

Domain 2: Networking (20%)

• Common ports: 20/21 FTP, 22 SSH, 23 Telnet, 25 SMTP, 53 DNS, 80 HTTP, 110 POP3, 143 IMAP, 443 HTTPS, 3389 RDP
• Cabling: Cat5e/6/6a/7/8, fiber (single-mode vs multi-mode), connectors (RJ45, LC, SC)
• TCP/IP fundamentals, IPv4 classes, private ranges, IPv6 basics
• Wireless: 802.11a/b/g/n/ac/ax (Wi-Fi 4-6E), frequencies, security (WPA2, WPA3)
• Internet appliances: firewall, IDS/IPS, UTM, load balancer, proxy

Domain 3: Hardware (25%)

• RAM types: DDR3, DDR4, DDR5, ECC, channels, timing
• Storage: HDD vs SSD, NVMe, SATA, M.2, RAID 0/1/5/6/10
• Motherboards: ATX, mATX, ITX, chipsets, BIOS/UEFI
• CPUs: cores, threads, sockets, cooling
• Power: PSU wattage, connectors, ATX 24-pin, EPS
• Printers: laser imaging process (the famous 7 steps), inkjet, thermal, 3D printers

Domain 4: Virtualization & Cloud (11%)

• Hypervisor types: Type 1 (bare-metal) vs Type 2 (hosted)
• Cloud models: IaaS (raw VMs), PaaS (managed runtime), SaaS (full apps)
• Deployment: public, private, hybrid, community
• Cloud characteristics: elasticity, on-demand, measured service, shared resources

Domain 5: Troubleshooting (29% — biggest!)

• CompTIA's 6-step troubleshooting methodology (memorize this)
• Hardware: BSOD, no POST, smoke, capacitor swelling, overheating
• Network: ping, ipconfig, tracert, nslookup, no link, intermittent
• Printer: paper jams, ghost images, vertical lines, toner issues
• Storage: clicking HDD, RAID degraded, S.M.A.R.T. failures

8-Week Study Plan

Week 1: Mobile Devices (Domain 1)

• Watch Professor Messer's Domain 1 videos
• Read corresponding chapters in Mike Meyers' All-in-One A+ Guide
• Practice: identify connector types from photos

Week 2-3: Networking (Domain 2)

• Memorize the common port table - flash cards work well here
• Lab: identify cable types, terminate an Ethernet cable
• Practice subnetting basics (you will deepen this on Network+)

Week 4-5: Hardware (Domain 3)

• Build or open a desktop PC if you have one - even old hardware
• Learn the laser printer imaging process cold
• RAM and storage compatibility - watch motherboard documentation videos

Week 6: Virtualization & Cloud (Domain 4)

• Install VirtualBox or VMware, run a Linux VM
• Sign up for AWS Free Tier or Azure Free Account - explore IaaS hands-on
• Compare IaaS/PaaS/SaaS with concrete examples

Week 7: Troubleshooting (Domain 5)

• Read every troubleshooting scenario you can find
• Practice CompTIA's 6-step methodology - it shows up on PBQs
• Walk through real Windows and printer issues from forums

Week 8: Practice Exams

• Take full-length practice exams under timed conditions
• Aim for 80%+ consistently before booking
• Review every wrong answer and trace it back to the objective

Performance-Based Question Tips

PBQs are the part most candidates fail. They are typically simulations or drag-and-drop scenarios that test applied knowledge, not memorization.

• Skip and return. PBQs eat time. Skip them at the start, finish multiple choice first, then come back with all remaining time.
• Read the scenario fully. Many PBQs hide the answer in scenario context. Don't react to the screenshot before reading the prompt.
• Use process of elimination on simulations. Even partial credit is awarded - get what you can rather than skipping completely.
• Common PBQ topics: printer troubleshooting, network troubleshooting, RAID configuration, cable identification, port blocking on a firewall.

Top Resources for 220-1101

Free Resources

• Professor Messer's free 220-1101 video series - the gold standard. Watch the entire series before booking.
• CompTIA exam objectives PDF - source-of-truth blueprint, free download from comptia.org
• ExamCert free practice questions - 350+ questions with detailed explanations
• VirtualBox + Windows ISO - free hands-on lab

Paid (Worth It)

• Mike Meyers' All-in-One CompTIA A+ Guide - the classic comprehensive book
• Professor Messer's CourseNotes & Practice Exams - condensed study guide
• CertMaster Practice - CompTIA's official practice tool

Exam Day Strategy

• Sleep 7-8 hours - this matters more than another hour of cramming
• Arrive 30 minutes early (or test your room thoroughly if online proctored)
• Bring two valid IDs - the second one matters more often than people expect
• Skip PBQs on first pass, do all multiple-choice, then circle back
• Mark uncertain questions for review and don't burn time on a single question
• Use the on-screen calculator and notepad - they are there for a reason

After A+ - What's Next?

A+ alone gets you in the door at $50,000-$65,000 USD as a help desk or desktop support tech. The next two certifications dramatically expand your earning power and role options:

• CompTIA Network+ (N10-009) - vendor-neutral networking, DoD 8570 IAT Level II. $60,000-$85,000 USD.
• CompTIA Security+ - the most-required entry-level security cert. DoD 8570 IAT Level II. $70,000-$95,000 USD.
• AWS Cloud Practitioner or Azure AZ-900 - cloud literacy, useful for any modern IT role.
• Cisco CCNA 200-301 - if you go deep on networking, this is the most-respected vendor cert.

Frequently Asked Questions

How long does it take to study for A+ 220-1101?

Most candidates need 6-8 weeks of focused study at 10 hours per week. With prior PC building or help desk experience, 3-4 weeks is realistic. The performance-based questions on networking and hardware troubleshooting are what trip up most people.

What is the passing score for A+ 220-1101?

675 on a scaled 100-900 score, which is roughly 70-75% correct. Performance-based questions are weighted heavily so don't skip them.

Should I take A+ Core 1 or Core 2 first?

Take Core 1 (220-1101) first. The hardware and networking foundation makes Core 2 (operating systems, security, troubleshooting) much easier to absorb. Either order is allowed, but the recommended path is 220-1101 then 220-1102 within 12 months.

Is A+ worth it in 2026?

Yes - A+ is still the most-required entry-level IT cert in job postings, DoD 8570 approved for IAT Level I, and the launch pad to Network+ and Security+. First-job salaries are $50,000-$65,000 USD with rapid growth as you stack more credentials.