> DNS over HTTPS uses TCP-based http/2 DoH (ietf rfc 8484) recommends http/2 as a minimum, http/3 is a valid DoH transport. > which is less efficient What ki

> DNS over HTTPS uses TCP-based http/2 DoH (ietf rfc 8484) recommends http/2 as a minimum, http/3 is a valid DoH transport. > which is less efficient What kind of efficiency are you referencing? This is not a clear cut issue. > UDP-based QUIC (aka http/3) The linked rfc uses only the quic transport, not http/3.