Fedora and fallback DNS servers

as someone currently teaching a Computer Engineering "Network Engineering" course, you are right on all counts on what we cover. Also the time the Computer Science students took the class (due to a prof on sabbattical in their department) they struggled a bit because their classes tend not to cover low-level real world topics.

As an aside, the networking class is getting hard to teach. With DNS moving to be tunneled over https, with https being encrypted (instead of plaintext), and with HTTP3 being QUIC which is custom-protocol-tunnelled through UDP, the analyzing-tcpdump exercises are becoming more or less useless.