DNS Flag Day 2020

What this post added

This post details Cloudflare's compliance with DNS Flag Day 2020, an initiative focused on increasing DNS messaging reliability by addressing IP fragmentation of DNS packets. It explains the problems with UDP transport for DNS, the importance of DNS over TCP, and how Cloudflare's authoritative DNS and 1.1.1.1 resolver already adhere to the standards by enforcing UDP message size limits and supporting TCP, thus requiring no action from existing users.