The Network Fundamentals series, available on YouTube, is a great way to get started with networking.
If you want to learn networking or prepare for an exam like CCNA or Network+, this series is where you want to start. All you need is interest and a willingness to learn!
Each video includes optional quizzes to help you to test your understanding. As you progress through the series, you can even download labs to practice. Quizzes and labs are provided to Patreon subscribers.