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Domain Glossary - 101 Domain
Category: Technical and IT > Domain name terms
Date & country: 22/08/2013, US
Words: 33

A record
The representation of an IPv4 address in the DNS system.

AAAA record
The representation of an IPv6 address in the DNS system.

A subcategory of private IP address. See Private IP Addresses.

A subset of IRIS for performing registration lookups on IP addresses.

Authoritative Name Server
a domain name server configured to host the official record of the contents of a DNS zone. Each Barbados ..bbdomain name must have a set of these so computers on the Internet can find out the contents of that domain. The set of authoritative name servers for any given domain must be configured as NS records in the parent domain.

Caching Resolver
the combination of a recursive name server and a caching name server.

A technology that can be added to the Domain Name System to verify the authenticity of its data. The works by adding verifiable chains of trust that can be validated to the domain name system.

Hints File
A file stored in DNS software (i.e. recursive name servers) that tells it where the DNS root servers are located.

The name of a computer. Typically the left-most part of a fully-qualified domain name.

IANA Considerations
A component of RFCs that refer to any work required by IANA to maintain registries for a specific protocol.

IANA Contract
The contract between ICANN and the US Government that governs how various IANA functions are performed.

Internet Coordination Policy (ICP)
A series of documents created by ICANN between 1999 and 2000 describing management procedures.

IP address
A unique identifier for a device on the Internet. The identifier is used to accurately route Internet traffic to that device. IP addresses must be unique on the global Internet.

Internet Protocol version 4. Refers to the version of Internet protocol that supports 32-bit IP addresses.

Internet Protocol version 6. Refers to the version of Internet protocol that supports 128-bit IP addresses.

NS record
a type of record in a DNS zone that signifies part of that zone is delegated to a different set of authoritative name servers.

Private enterprise numbers (PENs)
A unique numbering system used by several different Internet protocols (such as SNMP and LDAP) that use Abstract Notation Syntax One (ASN.1).

PTR record
The representation of a IP address to domain name mapping in the DNS system.

Recursive Name Server
A domain name server configured to perform DNS lookups on behalf of other computers.

The transfer of a delegation from one entity to another. Most commonly used to refer to the redelegation process used for top-level domains.

Redelegation process
A special type of root zone change where there is a significant change involving the transfer of operations of a top-level domain to a new entity.

Regional Internet Registry (RIR)
A registry responsible for allocation of IP address resources within a particular region.

The entity that has acquired the right to use an Internet resource. Usually this is via some form of revocable grant given by a registrar to list their registration in a registry.

Root Servers
the authoritative name servers for the Root Zone.

Root Zone Management RZM
The management of the DNS Root Zone by IANA.

Sponsoring organization
The entity acting as the trustee of a top-level domain on behalf of its designated community.

Trust anchor
A known good cryptographic certificate that can be used to validate a chain of trust. trust anchor repository (TAR) Any repository of public keys that can be used as trust anchors for validating chains of trust. See Interim Trust Anchor Repository (ITAR) for one such repository for top-level domain operators using DNSSEC.

A standard describing a repertoire of characters used to represent most of the worlds languages in written form. Unicode is the basis for internationalized domain names.

A standard used for transmitting Unicode characters.

Variant bundle
A collection of multiple domain names that are grouped together because some of the characters are considered variants of the others.

WHOIS database
Used to refer to parts of a registry

WHOIS server
A system running on port number 43 that accepts queries using the WHOIS protocol.

A machine-readable file format for storing structured data. Used to represent web pages (in a subset called HTML) etc. Used by IANA for storing protocol parameter registries