Updating zone files on primary dns
For example, the domain name to the addresses 220.127.116.11 (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.
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 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.
Although not intended to be a general purpose database, DNS can store records for other types of data for either automatic lookups, such as DNSSEC records, or for human queries such as responsible person (RP) records.
As a general purpose database, the DNS has also been used in combating unsolicited email (spam) by storing a real-time blackhole list.
Network administrators may delegate authority over sub-domains of their allocated name space to other name servers.For zones operated by a registry, administrative information is often complemented by the registry's RDAP and WHOIS services.That data can be used to gain insight on, and track responsibility for, a given host on the Internet.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.