Compared to HTTP DNS is crazy cheap to serve, but you'll still end up bottlenecking on the pps rate of your NIC and OS. Everybody optimizes for high throughput

Compared to HTTP DNS is crazy cheap to serve, but you'll still end up bottlenecking on the pps rate of your NIC and OS. Everybody optimizes for high throughput and ignores small packets. Speaking of DNS DDoS, DNS Made Easy saw a 40Gbit DNS DDoS a few weeks back.