Resource records
02DNS stores typed records, not simply a table of names and IP addresses.
Terms in this drawing
Related RFCs and changes
“Updates” changes part of an earlier RFC. “Obsoletes” replaces it. This list shows selected related documents.
DIAGRAM§ 3.6 ↗
RFC 1034 · § 3.6EXAMPLE
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04
Use the discovered service.
Delivering email is a separate application protocol.
Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
Read the updated RFC section ↗
Ask for the record type you need.
- A record has an owner, type, class, TTL, and type-specific data.
- A records map names to IPv4 addresses; MX identifies mail exchangers; NS identifies name servers.
- Question, Answer, Authority, and Additional are distinct message sections.
The Additional section can save a later lookup, but is supporting information rather than a replacement for the answer.
Read the RFC section ↗Diagrams simplify the RFC. Read the linked sections for complete requirements.
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