Be suspicious of anything that includes DNSSEC in the "tech fundamentals", since it's rarely implemented (low single digit percentage uptake in the major TLDs). What other complexity are they failing to screen out?
Agreed and yeah he mentions that. I think he mostly just makes you familiar with DNSSEC because he sells AWS certification courses and it will come up on the Networking Specialty. The entire segment is only like 90 minutes so it’s not crazy in depth.
I found Cantrill’s course pretty solid. It is free and you can just skip to DNS & DNSSEC.