The Domain Name System ( DNS ) is a hierarchical distributed naming system for computers, services, or any resource connected to the Internet or a private network.

By providing a worldwide, distributed keyword-based redirection service, the Domain Name System is an essential component of the functionality of the Internet.

An often-used analogy to explain the Domain Name System is that it serves as the phone book for the Internet by translating human-friendly computer hostnames into IP addresses.

The Domain Name System distributes the responsibility of assigning domain names and mapping those names to IP addresses by designating authoritative name servers for each domain.

The Domain Name System also specifies the technical functionality of this database service.

The Domain Name System maintains the domain name hierarchy and provides translation services between it and the address spaces.

Internet name servers and a communication protocol implement the Domain Name System.

At the request of Jon Postel, Paul Mockapetris invented the Domain Name System in 1983 and wrote the first implementation.

In 1984, four Berkeley students — Douglas Terry, Mark Painter, David Riggle, and Songnian Zhou — wrote the first Unix implementation, called The Berkeley Internet Name Domain ( BIND ) Server.

The hierarchical Domain Name System, organized into zones, each served by a name server

The Domain Name System is maintained by a distributed database system, which uses the client-server model.

However, with only authoritative name servers operating, every DNS query must start with recursive queries at the root zone of the Domain Name System and each user system must implement resolver software capable of recursive operation.

To improve efficiency, reduce DNS traffic across the Internet, and increase performance in end-user applications, the Domain Name System supports DNS cache servers which store DNS query results for a period of time determined in the configuration ( time-to-live ) of the domain name record in question.

The Domain Name System includes several other functions:

Domain Name ( 15 ),

Domain Name Server ( 6 )</ td ></ tr >

Originally written by four graduate students at the Computer Systems Research Group at the University of California, Berkeley ( UCB ), the name originates as an acronym from Berkeley Internet Name Domain, reflecting the application's use within UCB.

The acronym BIND is for Berkeley Internet Name Domain, from a technical paper published in 1984.

This includes, but is not limited to, Domain Name System ( DNS ) Servers, Network Authentication, Network Shares, Network Resources, Email accounts, and all aspects of server software.

It helped spearhead development of the Internet, including the Domain Name System and refinement of TCP / IP communications protocols that remain fundamental to Internet operations.

In addition to helping develop TCP / IP and the Domain Name System ( DNS ), ISI contributed to the Net by editing the " Request for Comments " ( RFC ) series, the written record of the emerging network's technical structure and operation, from 1977 through 2009.

Per its original Bylaws, primary responsibility for policy formation in ICANN was to be delegated to three supporting organizations ( Address Supporting Organization, Domain Name Supporting Organization, and Protocol Supporting Organization ), each of which was to develop and recommend substantive policies and procedures for the management of the identifiers within their respective scope.

As expected, the Regional Internet Registries and the IETF agreed to serve as the Address Supporting Organization and Protocol Supporting Organization respectively, and ICANN issued a call for interested parties to propose the structure and composition of the Domain Name Supporting Organization.

In the Domain Name System, hostnames are mapped to IPv6 addresses by AAAA resource records, so-called quad-A records.

Included Windows XP Service Pack 2, the Royale Windows Theme and joining a Windows Active Directory Domain is disabled.

A DNS-based Blackhole List ( DNSBL ) or Real-time Blackhole List ( RBL ) is a list of IP addresses published through the Internet Domain Name Service ( DNS ) either as a zone file that can be used by DNS server software, or as a live DNS zone that can be queried in real-time.

If the system had no display, it was a DSP ( for Domain Service Processor ).

Nominet also deals with disputes about registrations of. uk domain names, via its Dispute Resolution Service ( DRS ), which is similar to the UDRP system used for generic Top Level Domain Names, but with certain innovations such as a free mediation service.

In 2000, Bill Manning and Bill Woodcock described the Multicast Domain Name Service which spawned the implementations by Apple and Microsoft.

DNS based Service Discovery ( DNS-SD ) is the other half of Apple's solution, built on top of the Domain Name System.

The implementation of name resolution infrastructure in the form of Windows Internet Naming Service ( WINS ) or Domain Name System ( DNS ) resolves this problem.

Two notable consequences of these advances are the Institute's collaboration with the Department of Army to launch the Study To Assess Risk and Resilience in Service Members ( STARRS ), a Framingham-like effort scheduled to last until 2014 and the Research Domain Criteria ( RDoC ) effort, which seeks to define basic dimensions of functioning ( such as fear circuitry or working memory ) to be studied across multiple levels of analysis, from genes to neural circuits to behaviors, cutting across disorders as traditionally defined.

A Service record ( SRV record ) is a specification of data in the Domain Name System defining the location, i. e. the hostname and port number, of servers for specified services.

* In March 2006, Consumer Fraud Reporting reports about about a company called “ Domain Listing Service ” sending out emails to domain name holders that look like a bill to register / renew their domain name listing a “ final notice ”.

* In August 2007, the Internet Centre reports of a wave of emails originating from China from “ Asian Domain Registration Service ”, implying that a domain name will be lost, or all Asian TLDs of the domain name will be taken away shortly by a foreign company.

They are used by various naming systems, e. g., Network Information Service ( NIS ), Domain Name System ( DNS ), Server Message Block ( SMB ), and the meaning of hostname will vary according to the naming system used.

Various administrative tools, notably User Manager for Domains, Server Manager and Domain Name Service Manager have improved graphical user interfaces.

* TEC. mn-TEC. mn Service of DomainNRG:. MN Domain Registrar from Minneapolis, MN

Persons wishing to apply for the Domain Name Service of dotPH Inc. (" dotPH ") need only register online at www. dot. ph and submit their contact information.

In computer networking, reverse DNS lookup or reverse DNS resolution ( rDNS ) is the determination of a domain name that is associated with a given IP address using the Domain Name Service ( DNS ) of the Internet.

According to the UK Technical Advisory Service for Images, this work is in the Public Domain.

* Domain Name Registration Service ( DNRS ) Committee

These sources include local operating system files ( such as / etc / passwd, / etc / group, and / etc / hosts ), the Domain Name System ( DNS ), the Network Information Service ( NIS ), and LDAP.

In domain-driven design, the Domain Model ( domain entities and actors ) covers all layers involved in modelling a business domain, including ( but not limited to ) Service Layer, Business Layer, and Data Access Layer thus ensuring effective communication at all levels of engineering.

Each Service Domain is decomposed into Service Types.

For example, the three Service Types associated with the Customer Services Domain are: Customer Preferences ; Customer Relationship Management ; and Customer Initiated Assistance.