> > Consider the following optimization to save an otherwise wasted UDP > query, TC=1 response exchange: > > A resolver receives the DS RRset for a zone as part of the delegation > response, that contains algorithm numbers of the DNSKEYs in the child > zone. From that it has a hint that large sized signatures and keys are > possible in the child zone with truncation likely, and it could avoid > UDP first and directly use TCP saving an extra roundtrip. >
Yes, this makes sense. Bas
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