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The Domain Name System (DNS) is a hierarchical and distributed name service that provides a naming system for computers, services, and other resources on the Internet or other Internet Protocol (IP) networks. It associates various information with domain names (identification strings) assigned to each of the associated entities.
The DNS is a hierarchical naming system for computers, services, or any resource participating in the Internet. The top of that hierarchy is the root domain . The root domain does not have a formal name and its label in the DNS hierarchy is an empty string .
The DNS root zone is the top-level DNS zone in the hierarchical namespace of the Domain Name System (DNS) of the Internet.. Before October 1, 2016, the root zone had been overseen by the Internet Corporation for Assigned Names and Numbers (ICANN) which delegates the management to a subsidiary acting as the Internet Assigned Numbers Authority (IANA). [1]
A fully qualified domain name (FQDN) is a domain name that is completely specified with all labels in the hierarchy of the DNS, having no parts omitted. Traditionally a FQDN ends in a dot (.) to denote the top of the DNS tree. [1]
A DNS zone is a specific ... The domain namespace of the Internet is organized into a hierarchical layout of ... As an example of the DNS resolving process, ...
.org[.] is a node in the DNS tree, just like wikipedia.[org.] and en.[wikipedia.org.]. As such, it has its own DNS records. Due to the structure of DNS, each node in the tree has its own collection of records, and since top-level domains are nodes in DNS, they have records of
IANA administers the data in the root nameservers, which form the top of the hierarchical Domain Name System (DNS) tree. [11] This task involves liaising with top-level domain "Registrar-of-Record"s, the root nameserver operators, and ICANN's policy making apparatus. [12]
Domain names are managed under a hierarchy headed by the Internet Assigned Numbers Authority (IANA), which manages the top of the DNS tree by administrating the data in the root nameservers. IANA also operates the int registry for intergovernmental organizations, the arpa zone for protocol administration purposes, and other critical zones such ...