We all know the DNS, right? But when we need to troubleshoot it, it’s getting much more complicated than initially thought. DNS ≠ DNS ≠ DNS. And unfortunately: It’s Always DNS.
To get a better understanding of those different kinds of DNS servers (authoritative vs. recursive), DNS messages (recursive, iterative, zone transfer, …) as well as other techniques (conditional forwarding, DoH, …), I draw a poster to have it all at a glance! Here it is:
This is my approach to a picture that is worth a thousand words. I’m using it during training sessions and at customers’ sites when explaining things related to DNS. Of course, this drawing is not perfect and does not show every detail. But it’s a good starting point. ;) If you have any thoughts or corrections, please use the comment section down below.
Poster as PDF
–> Download it in high quality as a PDF <–
That’s it. ;)
Soli Deo Gloria!
Photo by Kyle Glenn on Unsplash.