A domain is a coherent of a hierarchical Domain Name System (DNS). Every computer in a domain has an individual designation in the DNS (e.g. www). This individual designation is expanded – divided by a dot – with the name of the domain (e.g. webland.ch). The qualified domain name (e.g. www.webland.ch.) constituted in this fashion can be resolved into an IP address by the DNS. The address can then be used to construct network connections to this computer.