how DNS works!
this video explains authoritative and recursive DNS servers and caching! And we pretend to be a recursive DNS server.
A fun exercise is to write a program that makes a recursive DNS query using the authoritative servers! (what we did in this video, but in a program instead of using dig + copy/paste). You can do this in Python using Scapy, which is a pretty easy-to-use library that lets you easily make and send packets.
