CompTIA Security+ Key Vocabulary
Essential terms and definitions you must know before exam day.
Key Vocabulary
PBQ
Performance-Based Question — a simulated lab task within the exam.
UEFI
Unified Extensible Firmware Interface — modern replacement for BIOS.
MFA
Multi-Factor Authentication — requires two or more verification methods.
RAID
Redundant Array of Independent Disks — storage configuration for redundancy or performance.
Vocabulary Study Tips
- 1.Use Professor Messer's free study guide and practice exams — they closely match real exam content.
- 2.Set up a home lab: practice installing OSes, configuring networks, and troubleshooting hardware.
- 3.Memorize port numbers: HTTP 80, HTTPS 443, SSH 22, DNS 53, SMTP 25, RDP 3389.
- 4.CompTIA's 6-step troubleshooting methodology is tested directly — know it cold.