Historically, other directory services preceding DNS were not scalable to large or global directories as they were originally based on text files, prominently the HOSTS. The Internet maintains two principal namespaces, the domain name hierarchy 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.

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This may be useful for granting users access to the internet by remotely updating their registry to know which DNS servers to use. If adapter is configured to use DHCP server, then exact name is not "Name Server" but "DHCPName Server". If there are several network adapters in computer, then location of "Name Server" as you have written is incorrect.

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For example, the domain name to the addresses 93.184.216.119 (IPv4) and 260:6d:26bf:1497:aa7 (IPv6).

Unlike a phone book, DNS can be quickly updated, allowing a service's location on the network to change without affecting the end users, who continue to use the same host name.

By providing a worldwide, distributed directory service, the Domain Name System is an essential component of the functionality of the Internet, that has been in use since the 1980s.

The Domain Name System delegates the responsibility of assigning domain names and mapping those names to Internet resources by designating authoritative name servers for each domain.

TXT that mapped host names to the numerical addresses of computers on the ARPANET.

Maintenance of numerical addresses, called the Assigned Numbers List, was handled by Jon Postel at the University of Southern California's Information Sciences Institute (ISI), whose team worked closely with SRI. To request a host name and an address and add a computer to the master file, users contacted the SRI's Network Information Center (NIC), directed by Elizabeth Feinler, by telephone during business hours.

The DNS database is traditionally stored in a structured zone file.

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.

A DNS name server is a server that stores the DNS records for a domain; a DNS name server responds with answers to queries against its database.