What are all the flags in a dig response?

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I am using RFC 1035 as source, keeping to the sequence from there, regardless if you already mentioned it in your question.

  • QR specifies whether this message is a query (0), or a response (1)
  • OPCODE A four bit field, only valid values: 0,1,2
  • AA Authoritative Answer
  • TC TrunCation (truncated due to length greater than that permitted on the
    transmission channel)
  • RD Recursion Desired
  • RA Recursion Available
  • Z Reserved for future use. Must be zero

There were two more DNSSEC-related flags introduced in RFC 4035:

  • CD (Checking Disabled): indicates a security-aware resolver should
    disable signature validation (that is, not check DNSSEC records)
  • AD (Authentic Data): indicates the resolver believes the responses to be authentic – that is, validated by DNSSEC

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