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DNS over something else

DNS over DONUTS

DNS carried over normal, unencrypted TCP streams.

DONUTStransportnovelty

Screenshot used in the talk for DNS over DONUTS
Screenshot used in the original talk.

DONUTS means DNS over normal, unencrypted TCP streams. The example treats a generic TCP connection as the transport below DNS.

It is a useful reminder that a DNS transport can be technically simple and still unusual in practice. The name is also very good.