DNS (Domain Name System) – a key Internet service which permits the translation of textual address identifiers into numerical ones and vice versa. DNS simplifies the use of the Internet, since Internet communication is based on hard-to-remember numerical IP addresses.
An Internet domain name becomes active once the registration data are entered, including data on the DNS servers, into the DNS table of the central registry database and that table is made active on public DNS servers.
Central registry database – a centralised collection of data on the Internet domain names registered within a particular top-level domain, with information on their registrants and other registration data. Registration data include the addresses of the DNS servers which make the domain registered in the central registry visible on the Internet.
DNS server – a device which supplies the necessary IP address for a service requested on a particular domain, allowing communication and the exchange of data on the network. The DNS server finds these data on domains and IP addresses from a collection of data called the DNS zone file or DNS table.
DNSSEC (DNS Security Extensions) – a system of security standards which facilitates the verification of the integrity of data in the DNS system.