Free Study Tools

Free CompTIA Study Tools

Quick-reference tools to help you study for CompTIA Security+, Network+, and A+ exams. All tools are free, no signup required.

Port Number Lookup

Search 200+ network ports commonly tested on CompTIA exams. Filter by certification, protocol, and service name.

Look up 350+ acronyms from CompTIA exam objectives. Instant search with alphabet filter and cert-specific views.

Calculate subnets, CIDR notation, wildcard masks, and usable hosts. Includes binary visualization for Network+ prep.

Practice with 1,500+ exam-style questions, AI explanations, and RPG gamification. Free to start.