Generic top-level domains (gTLDs)
Generic top-level domains (gTLDs) are one of the categories of top-level domains (TLDs) maintained by the Internet Assigned Numbers Authority (IANA) for use in the Domain Name System of the Internet.
Domain Name System (DNS)
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. The Domain Name System has been an essential component of the functionality of the Internet since 1985.
cyberspace 