Out of curiosity, did you have a notion of how those various sorts of networks were related or not-related, or was it just a hazy blank spot you never thought a

Out of curiosity, did you have a notion of how those various sorts of networks were related or not-related, or was it just a hazy blank spot you never thought about? I'm super curious about this, having grown up in the telephone network, and I keep running into people with interesting misconceptions. (The one that comes first to mind, and which I see quite a bit lately, is that modems and "the internet" were the same thing; people don't realize standalone computers could just call each other directly.)