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A domain name is a string that identifies a realm of administrative autonomy, authority or control on the Internet. Learn how domain names are formed, used, managed and organized in the Domain Name System (DNS) hierarchy.
Learn about the origins, evolution and controversies of Internet governance, the system of laws, rules, policies and practices that shape the Internet. Explore the roles and perspectives of different stakeholders, such as governments, corporations, civil society and technical communities.
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 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.
CIDR (Classless Inter-Domain Routing) is a method for allocating IP addresses for IP routing, introduced in 1993 to replace the previous classful network architecture. CIDR uses variable-length subnet masking and CIDR notation to specify the network prefix and host identifier of an IP address.
A fully qualified domain name (FQDN) is a domain name that specifies its exact location in the tree hierarchy of the Domain Name System (DNS). It specifies all domain levels, including the top-level domain and the root zone, and is written as a list of domain labels separated by dots.
Learn about the process of acquiring a domain name from a domain name registrar, the history of domain registration, and the fees and services involved. Find out how to transfer a domain name between registrars and the policies and procedures involved.
XMPP is a decentralized and extensible protocol for instant messaging, presence information, and contact list maintenance. It uses XML and TCP or HTTP to exchange structured data between network entities, and has many applications beyond traditional IM.