I am relatively new to VPN's and networking in general. I know the basic structure and osi structure, but not really how they interact, the command calls, and what happens in what order on a practical level. Does anyone know a good video, podcast, book, etc., on how things start to break down, perhaps even, in their order of operations? In a procedural oriented programming kind of way (which is what I imagine networking to be--correct me if I am wrong). English, German, ok. If anything helped you to learn more about how networks, network topography, and and network security, please let me know.