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A name server is a computer application that provides responses to queries against a directory service, such as DNS. Learn about the different types of name servers, such as authoritative, recursive, caching, and root, and their functions and examples.
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 IP networks. It uses the DNS protocol, which specifies the data structures and data communication exchanges used in the DNS, and runs over UDP or TCP.
Learn about the root name server, a critical part of the Internet infrastructure that resolves domain names into IP addresses. Find out the history, operation, and addresses of the 13 root name servers and their instances.
Learn about the different types and categories of top-level domains (TLDs) in the Domain Name System of the Internet. See the list of 1502 TLDs, including generic, country code, infrastructure, and test domains, with their names, entities, and notes.
Learn about the different types of resource records (RRs) used in the Domain Name System (DNS) to store information about domains and hosts. See the type, type id, defining RFC, description, function and examples of each RR.
Authoritative server: authoritative name servers publish DNS mappings for domains under their authoritative control. Typically, a company (e.g. "Acme Example Widgets") would provide its own authority services to respond to address queries, or for other DNS information, for www.example.int. These servers are listed as being at the top of the ...
Google Public DNS is a free and public Domain Name System (DNS) service by Google that functions as a recursive name server. It offers DNSSEC validation, DNS over HTTPS, DNS over TLS, and DNS64 support, and uses the IP addresses 8.8.8.8, 8.8.4.4, 2001:4860:4860::8888, and 2001:4860:4860::8844.
A directory service or name service maps the names of network resources to their respective network addresses. It is a shared information infrastructure for locating, managing, administering and organizing everyday items and network resources. Learn about the comparison with relational databases, replication and distribution, and implementations of directory services.