dnsrfcnomenclaturerfc1035

What does QD stand for in DNS RFC1035


I was just curious about the nomenclature of certain variables part of DNS's RFC: https://www.ietf.org/rfc/rfc1035.txt

While I was able to find most other acronyms :

I was wondering what does "QD" stand for in the "QDCOUNT"?


Solution

  • it wasn't an acronym. QDCOUNT just means what it's defined to mean. FWIW, i always think of it as Query Domain Count, because the query section has no RDATA's in it unlike the other sections, each query has just a Name, Class, and Type.

    note that this field is useless now, because BIND has always rejected QDCOUNT != 1. there is no way to ask more than one question per transaction, and it's not an oversight, rather it's because there is only one AA bit to describe the entire answer section.