Subnet Driller vs NetPilot

An offline subnetting quiz for CCNA, Network+, and other certification candidates. Questions are randomly generated, answers are deterministic, and every calculation is hand-verified. It drills the "magic number" / block-size method I memorized before my own exams: built for speed and repetition. Features: - Built-in block-size ("magic number") reference, one tap away - Five question types: network address, broadcast, first and last usable host, usable host count - Multiple choice or written answers - or a mix of both - SESSION and TOTAL counters, plus a per-type accuracy breakdown - Optional daily practice reminder - Fully offline - no accounts, ads, tracking, or subscriptions - Shamelessly vibe coded using Fable 5; the subnet math lives in its own package and is hand-verified for accuracy About me: I'm a working network engineer and active CCNA, living in Arizona, USA. Questions, feedback, or bug reports? I read and reply to every email personally. Subnet Driller is an independent study tool, not affiliated with, endorsed by, or sponsored by Cisco Systems, Inc. or CompTIA, Inc. CCNA and Network+ are trademarks of their respective owners.

Build your networking knowledge. Practice the commands. Understand the why. NetPilot brings networking lessons, hands-on CLI practice, quizzes, and reference tools together on your iPhone and iPad. Whether you're studying for the CCNA, preparing for an interview, or refreshing your skills, make your next study session count. LEARN THE FUNDAMENTALS Explore 49 academy topics covering networking fundamentals, IP addressing, routing, switching, wireless, security, and more. Follow guided learning paths to connect your reading with practical exercises. PRACTICE AT THE COMMAND LINE Work through 366 guided CLI labs or experiment in the CLI sandbox. Practice supported Cisco IOS-style commands with contextual ? help, command completion, and configuration modes in a simulated environment. No physical router required. TEST YOUR UNDERSTANDING Practice with 500 questions across 24 categories. Use Study mode to learn with explanations, or challenge yourself with timed exams. Review incorrect answers and identify the areas that need more attention. BUILD YOUR DAILY HABIT Track quiz results, completed labs, study streaks, and learning-path progress. Earn achievements, save useful content, and set optional study reminders. KEEP USEFUL REFERENCES CLOSE Review networking interview questions, browse configuration examples, look up acronyms, and sharpen your subnetting skills with built-in tools. DESIGNED FOR YOUR STUDY STYLE Choose your color theme and appearance. Study on iPhone or take advantage of adaptive iPad layouts. Bundled lessons and practice content are available offline. START FREE Explore academy content, selected quiz categories, and 10 free CLI labs. Additional quiz categories, labs, and premium resources require NetPilot Pro. NetPilot is an independent educational app and is not affiliated with or endorsed by Cisco. The CLI is a training simulation, not a complete implementation of Cisco IOS. Practice results do not guarantee certification exam results. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://netpilotapp.com/privacy-policy/