I have had contact with Quad9. This was their response:
I've read reports from the community that each DNS requests causes a net-new HTTP/2 request, which, if true, is not really going to scale and may not even be stable. I have not verified this.
I have had contact with Quad9. This was their response:
I've read reports from the community that each DNS requests causes a net-new HTTP/2 request, which, if true, is not really going to scale and may not even be stable. I have not verified this.