Category glossary

Resource record glossary — page 2

34 definitions associated with Resource record.

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PTR record

A Pointer record maps a reverse-domain name to another domain name, most commonly mapping an IPv4 or IPv6 address to a host name. Multiple PTRs are technically possible but can confuse applications.

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RESINFO record

The Resolver Information record lets a resolver publish information about its capabilities or configuration through key-value data. Clients can discover it using the resolver.arpa framework.

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RRSIG record

A DNSSEC signature record covering an RRset. It identifies the covered type, algorithm, signer, key tag, inception and expiration times, and cryptographic signature.

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SOA record

The Start of Authority record identifies key zone parameters including MNAME, RNAME, serial, refresh, retry, expire, and minimum fields. Every authoritative zone has an SOA at its apex.

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SRV record

A Service record identifies the target host and port for a named service, with priority and weight values for selection. The owner name normally begins with _service._protocol.

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SVCB record

A Service Binding record that describes alternative service endpoints and connection parameters. It supports alias mode and service mode and is the base format specialized by the HTTPS record.

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TLSA record

A record that associates a TLS service with an expected certificate or public key using usage, selector, and matching fields. Secure use depends on DNSSEC validation.

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TXT record

A Text record contains one or more character strings, each limited to 255 octets in wire format. TXT is used by many applications for verification, email policy, security, and metadata, with application-specific syntax.

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Zone digest

A cryptographic digest over canonical zone data used to verify that a transferred or published zone is complete and unmodified. The ZONEMD record carries the digest at the zone apex.

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ZONEMD record

A Message Digest Over Zone Data record that provides a digest of the zone contents. It can detect corruption or incomplete distribution but does not replace DNSSEC authentication of individual answers.

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