Packet.School is a free, gamified platform to learn networking fundamentals. Master OSI, TCP/IP, DNS, subnetting, and more through interactive simulations where you watch packets travel, build networks with drag-and-drop, and practice real terminal commands. Earn XP, take quizzes, unlock levels, and get a verifiable certificate when you complete all lessons. No signup required, works on mobile. Perfect for students, career changers, or anyone curious about how the internet actually works.
