An often-used analogy to explain the DNS is that it serves as the phone book for the Internet by translating human-friendly computer hostnames into IP addresses. For example, the hostname www.example.com … See more

Domain name space
The domain name space consists of a tree data structure. Each node or leaf in the tree has a label and zero or more resource records (RR), which … See more

The Domain Name System specifies a database of information elements for network resources. The types of information elements are categorized and organized with a See more

Dynamic DNS updates use the UPDATE DNS opcode to add or remove resource records dynamically from a zone database maintained on an authoritative DNS server. This facility is useful to register network clients into the DNS when they boot or become … See more

Using a simpler, more memorable name in place of a host's numerical address dates back to the ARPANET era. The Stanford Research Institute (now SRI International) maintained a text file … See more

Address resolution mechanism
Domain name resolvers determine the domain name servers responsible for the domain name in … See more

The original DNS protocol had limited provisions for extension with new features. In 1999, Paul Vixie published in RFC 2671 (superseded by RFC 6891) an extension mechanism, called See more