Can you learn computer networking on your own?

Is it really feasible to learn computer networking by oneself, without the guidance of a teacher or formal education? Are there online resources and self-study tools available that can provide a comprehensive understanding of the intricacies of computer networks? And how can one ensure that they are mastering the subject matter effectively, without the immediate feedback and support of a classroom setting? I'm curious to know if individuals have successfully navigated this path and if there are any specific strategies or approaches that have proven to be particularly effective.