2026 Comparison Guide

Best CompTIA Security+ Study Resources

Security+ is the most widely recognized entry-level cybersecurity certification — and one of the most searched. Here's what's actually worth buying and what you can get for free.

CompTIA Security+ (SY0-701) is the cybersecurity certification that hiring managers recognize. It opens doors that A+ and Network+ don't — penetration testing firms, government agencies, and enterprise security teams all list it as a baseline requirement. If you've passed Network+ or have networking experience, Security+ is the natural next step. This page covers the study materials worth your time.

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DoD 8570 / 8140 Approved — IAT Level II & IAM Level I
Security+ is approved for multiple DoD roles under the 8570/8140 framework, making it essentially mandatory for anyone pursuing federal IT or cybersecurity work. It carries significantly more weight than A+ or Network+ for government and defense contractor positions.

Quick Comparison

Resource Best For Format Price Verdict
Chapple & Seidl Sybex Kit Comprehensive Book + practice tests ~$50–60 ⭐ Top Pick
Dion Training Practice Exams Exam Ready Online practice tests ~$30–40 Best for test prep
Professor Messer Budget Free video course Free Best free option
📘 Best Overall Study Guide

CompTIA Security+ Certification Kit: Exam SY0-701

by Mike Chapple & David Seidl  ·  Sybex Study Guide Series, 7th Edition  ·  Covers current SY0-701 exam

⭐ Top Pick

Mike Chapple and David Seidl are two of the most trusted names in Security+ prep — Chapple holds numerous security certifications and has been writing CompTIA study guides for over a decade. This Sybex kit is the 7th edition, fully updated for the current SY0-701 exam objectives. It's a complete package: the study guide itself plus practice test access, making it the closest thing to a one-stop resource for the exam.

  • Covers all SY0-701 exam domains — threats, vulnerabilities, cryptography, identity management, architecture, and operations
  • Written by Mike Chapple & David Seidl — two of the most respected Security+ authors
  • 7th edition fully updated for the current SY0-701 exam objectives
  • Part of the trusted Sybex Certification Kit series — includes study guide and practice tests
  • Covers performance-based questions (PBQs) — the scenario-based questions that trip up many test-takers
  • Clear explanations of complex topics like PKI, cryptographic algorithms, and zero trust architecture
✓ Pros
  • Highly trusted authors with deep Security+ experience
  • Complete kit — study guide plus practice test access
  • Thorough coverage of all SY0-701 domains
  • Strong on performance-based questions
✗ Cons
  • Dense material — Security+ covers a lot of ground
  • Best paired with additional practice exams for full readiness
🧪 Best Practice Exams

Dion Training Security+ Practice Exams

by Jason Dion  ·  The most exam-realistic practice tests available for Security+

Security+ is harder than most people expect — not because the concepts are impossibly complex, but because the exam tests applied judgment rather than raw memorization. A question won't just ask what a firewall is; it'll describe a scenario and ask which control is most appropriate. Dion Training's practice exams are built around exactly this kind of scenario-based question, and they're consistently cited by Security+ passers as the closest to the real exam in both wording and difficulty.

  • Scenario-based questions mirror the real SY0-701 exam format closely
  • Covers all Security+ domains — threats, architecture, implementation, operations, governance
  • Includes performance-based question (PBQ) practice — the most challenging question type on the exam
  • Detailed explanations for every answer, including why distractors are wrong
  • Performance tracking helps identify which domains need more attention
💡 Security+ exam strategy

Flag and skip performance-based questions (PBQs) on your first pass — they appear at the start of the exam and can eat time. Answer all the multiple choice questions first, then return to PBQs with your remaining time. This alone improves scores for many candidates.

🎥 Best Free Option

Professor Messer Free Security+ Course

by Professor Messer  ·  Complete free video course covering all SY0-701 objectives

✓ Free

Professor Messer's Security+ course is one of the most widely used free resources for any CompTIA certification. His SY0-701 videos cover the full exam objectives in a structured, clear format. For Security+, the video format is especially useful — seeing concepts like PKI chains, network diagrams, and attack methodologies explained visually makes them easier to retain than reading alone. If you're on a tight budget or want to preview the material before committing to a paid resource, start here.

  • 100% free — no credit card or subscription required
  • Covers all SY0-701 objectives in structured, clearly explained videos
  • Updated for the current Security+ exam version
  • Visual format is particularly well-suited to security concepts like cryptography and network architecture
  • Study notes available separately if you prefer printable summaries

Which Should You Use?

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Just passed Network+, starting Security+
Chapple & Seidl study kit first, then add Dion practice exams in the final 2–3 weeks before your exam date
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You learn better from video than reading
Professor Messer as your primary resource, Dion practice exams throughout to test your understanding
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Tight budget
Professor Messer free course first — it's genuinely comprehensive. Add Dion practice exams when you're close to ready, as passing first try saves the retake fee (~$404)
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Failed once and need to retake
Heavy Dion practice exam focus on your weakest domains — threats/vulnerabilities and architecture trip up most retakers. Review PBQ strategy specifically
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Short timeline — exam in 4–6 weeks
Dion practice exams immediately to find your gaps, Professor Messer videos for weak areas. Don't try to read the full book cover to cover in this timeframe
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Pursuing government or DoD IT work
Invest in the full kit — Chapple & Seidl book plus Dion practice exams. Security+ is a hard requirement for many DoD roles and passing first try matters

The Winning Combination

For most Security+ candidates, the fastest path to passing looks like this:

📘 Sybex Certification Kit + 🧪 Dion Practice Exams = ✓ Pass

Aim for consistent 80%+ on practice tests before booking. Security+ rewards methodical preparation — the scenario-based questions require understanding, not just memorization.


Free Networking Foundation Guides

Security+ assumes solid networking knowledge. These free guides cover the concepts that underpin much of the security content on the exam: