Image Source: sdns2021.dnscrypt.info
Prevent snooping by third parties of requests sent to DNS root serversRFC8806
Aside from that, faster negative responses to non-existent domains eliminates junk to the root
Speaking of junk to the root, I did mention in my presentation that Chromium 87 has stopped sending junk queries to the root based on the Chromium bug report and Verisign’s blog post Chromium’s reduction of root DNS traffic
I did a quick check with Google Chrome 92.0.4515.131 and oddly enough I am still seeing this behaviour,
Aug 16 09:03:24 unbound[1:0] info: 192.168.100.4 ckgydztukkdsta. A IN Aug 16 09:03:24 unbound[1:0] info: 192.168.100.4 lubdcupibujjne. A IN Aug 16 09:03:24 unbound[1:0] info: 192.168.100.4 ltvlataieb. A IN
This will need further researching and debugging which I will save for another post.
For some reason as can be seen in the video, presentation is stuck at a specific slide, the PDF can be found here
All the presentations are available on Youtube.