Delegation & glue
03A parent zone points toward the servers responsible for a child. Address glue can make that referral reachable.
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Related RFCs and changes
“Updates” changes part of an earlier RFC. “Obsoletes” replaces it. This list shows selected related documents.
DIAGRAM§ 4.2.1 ↗
RFC 1034 · § 4.2.1EXAMPLE
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04
Continue at the delegated authority.
The resolver uses the referral to get closer to the answer.
Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
Read the updated RFC section ↗
Delegation divides responsibility.
- NS records mark a delegation at the lower boundary of a parent zone.
- The child zone contains its own authoritative data, including its apex SOA and NS records.
- Glue supplies necessary server addresses when finding those addresses would otherwise require first reaching the delegated zone.
A domain and a zone are different: the org domain contains example.org, but the org zone need not contain its delegated authoritative records.
Read the RFC section ↗Diagrams simplify the RFC. Read the linked sections for complete requirements.
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