NERD+ is a focused study companion for the CompTIA Network+ (N10-009) certification exam — built to help you find your weak spots fast and turn them into strengths before exam day. Everything you need to study is completely free. No ads, no subscription, no paywall on the core experience. FEATURES (ALL FREE) - Full practice question bank covering all 5 official exam domains - Diagnostic test to instantly see where you stand, domain by domain - Quick practice, full-time mock exams, and a mistake review queue that adapts as you go - Subnet Trainer — hands-on subnetting drills, not just multiple choice - Daily streak tracking to help you build a real study habit - Clean, distraction-free design built for focused studying Want more? Performance-Based Question (PBQ) drills — hands-on matching exercises covering the hardest, highest-value exam content — are available as an optional one-time unlock. Totally optional: the free experience above is everything you need to study and pass. NERD+ is an independent study tool and is not affiliated with, endorsed by, or sponsored by CompTIA. CompTIA and Network+ are trademarks of CompTIA, Inc.