RDATA
The type-specific data portion of a resource record, such as an IPv4 address in an A record or the fields of an SOA record.
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Browse the glossaryDNS glossary — page 10
311 definitions associated with DNS.
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311 matching terms
Page 10 of 13RDLENGTH
The resource-record field giving the length in octets of RDATA in the wire-format message.
Read definitionRDNSS
Recursive DNS Server option in IPv6 Router Advertisements. It allows routers to advertise recursive resolver addresses without DHCPv6.
Read definitionRecursive answer
An answer produced after a server performs or forwards resolution on behalf of a client. It is normally non-authoritative from the responding resolver's perspective.
Read definitionRecursive query
A query requesting that the server obtain a final answer or error on the client's behalf rather than returning only a referral. Recursion is requested with the RD bit and controlled by server policy.
Read definitionRecursive resolver
A server that accepts recursive queries, follows referrals or uses forwarders, caches results, and returns final answers to clients. It may also validate DNSSEC and apply policy.
Read definitionReferral
A response that directs a resolver to authoritative name servers closer to the requested name, normally through NS records in the authority section and optional glue in the additional section.
Read definitionRefresh interval
In an SOA, the interval after which a secondary checks the primary source for a new serial. In Microsoft DNS aging, the refresh interval is the period during which eligible refreshes update a record timestamp.
Read definitionRegistered domain
A domain registered through a registrar beneath a registry-controlled suffix. Application security often uses the concept of an organizational or registrable domain, which may require public-suffix policy data.
Read definitionRegistry lock
A registry-level protection that prevents selected domain changes until an out-of-band unlock process is completed. It reduces the risk of unauthorized transfer or delegation change.
Read definitionRelative domain name
A domain name interpreted relative to an origin or search suffix rather than the root. In a zone file, names without a trailing dot are usually relative to the current $ORIGIN.
Read definitionRESINFO 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.
Read definitionResolver
Software or a service that receives DNS questions and obtains answers from local data, cache, forwarding, or iterative queries. A resolver may be a stub, caching recursive resolver, forwarding resolver, or validating resolver.
Read definitionResolver operator
The organization or team responsible for a recursive resolver service, including policy, privacy, logging, security, capacity, and upstream connectivity.
Read definitionResource record (RR)
The basic typed data element in DNS, containing an owner name, type, class, TTL, and RDATA. Records with the same owner, type, and class form an RRset.
Read definitionResource record set (RRset)
All resource records with the same owner name, class, and type. DNSSEC signs an RRset as a unit, and authoritative servers should return the complete set subject to protocol rules.
Read definitionResponse
A DNS message sent in reply to a query, containing a status code and possibly answer, authority, or additional data. A response can be authoritative, recursive, referred, truncated, or policy-generated.
Read definitionResponse policy zone (RPZ)
A DNS zone format and resolver policy mechanism used to distribute rules for blocking, redirecting, or otherwise modifying answers based on queried names, answer addresses, name servers, or client context.
Read definitionResponse rate limiting
A server technique that limits repeated similar responses to reduce reflection and amplification abuse. It is commonly abbreviated RRL.
Read definitionReverse delegation
Delegation of authority for part of in-addr.arpa or ip6.arpa to the organization responsible for an address block. IPv4 prefixes not aligned on octet boundaries may require RFC 2317 techniques.
Read definitionReverse DNS
The use of PTR records in in-addr.arpa or ip6.arpa to map an IP address to a domain name. Reverse data is independently managed from forward A and AAAA records.
Read definitionReverse lookup
A query that converts an IP address into its reverse-domain name and requests a PTR record. The result is descriptive and does not by itself prove ownership or trust.
Read definitionReverse zone
An authoritative zone beneath in-addr.arpa or ip6.arpa containing PTR records and delegations for address space.
Read definitionrndc
The remote name daemon control utility used to manage BIND named, including reload, retransfer, freeze, thaw, flush, and status operations. It uses an authenticated control channel.
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