[jlelonm]

FWIW I thought they were both pretty spot on. In fact, you mentioned this about DNS:

"As I read articles and tried stuff out (and broke my server config more than once) I started to grasp the system, to get glimpses into how it all worked, until eventually it “clicked” and I felt comfortable working with it."

Have you written about your mental models for DNS? Color me interested!

[obedm]

That's something I hadn't considered before. That's probably something that a lot of people would find valuable.

Out of all the questions my students ask me, there's always confusion about the way servers talk to each other, or what they even are.

I'll definitely write about this now haha. Thank you for the idea :)