A domain name is an identification string that defines a realm of administrative autonomy.
A domain name is the address where Internet users can access your website. A domain name is used for finding and identifying computers on the Internet. ... Because of this, domain names were developed and used to identify entities on the Internet rather than using IP addresses.
A domain, in the context of networking, refers to any group of users, workstations, devices, printers, computers and database servers that share different types of data via network resources. There are also many types of subdomains.
A domain has a domain controller that governs all basic domain functions and manages network security. Thus, a domain is used to manage all user functions, including username/password and shared system resource authentication and access. A domain is also used to assign specific resource privileges, such as user accounts.