EDNS (Extension Mechanism for DNS) will be a great day for the Internet as many participating websites will be compliant with EDNS. EDNS removes the size restrictions currently imposed in the original DNS protocols created in 1987 under RFC1035. Users do not need to do anything as backward compatibility will operate if they dont have an EDNS-compliant version of their respective browsers. Tech giants such as Google, Facebook, Cisco, Cloudflare, and DNS resolver Quad9 are backing-up the initiative.”]
Source: https://hackercombat.com/edns-to-improve-dns-resolution-worldwide/