RFC: 2136 – Dynamic Updates in the Domain Name System (DNS UPDATE). April 1997, S. 3 (englisch). “The Header Section specifies that this message is an UPDATE, … An update transaction may be carried in a UDP datagram, if the request fits, or in a TCP connection …. UPDATE uses the same fields, and the same section formats, but the naming and use of these sections differs …”
RFC: 3007 – Secure Domain Name System (DNS) Dynamic Update. November 2000 (englisch).
RFC: 2137 – Secure Domain Name System Dynamic Update. April 1997 (aktualisiert durch RFC 1035, englisch).
RFC: 2931 – DNS Request and Transaction Signatures ( SIG(0)s ). September 2000 (englisch).