6. IANA Considerations

[RFC4034] contains a review of the IANA considerations introduced by DNSSEC. The following are additional IANA considerations discussed in this document:

[RFC2535] reserved the CD and AD bits in the message header. The meaning of the AD bit was redefined in [RFC3655], and the meaning of both the CD and AD bit are restated in this document. No new bits in the DNS message header are defined in this document.

[RFC2671] introduced EDNS, and [RFC3225] reserved the DNSSEC OK bit and defined its use. The use is restated but not altered in this document.

---