Even though he came out of windows world and has a wealth of info on windows, he also has a wealth of info on Macs and Linux, AI, Networking and Cyber Security. Below is just one example of his many videos.

Below is a summary of networking made simple. I hope it helps you to understand networking better. With most operating systems, the lower OSI layers of physical medium data link with MAC address, network with IP address, and transport with TCP or UDP, and will be understood by both devices.