Looks like one of the better overview, but the embedded links may provide the meat that you want.
If you can handle all of the “he said, she said, no I didn't” bloviating.
I understand a little bit better now and it makes a little bit more sense. But they’re over play in this in my opinion except for maybe routers. I have a hard time believing that packets of data would not be obvious.
Thank you for the link. I should’ve said that first.