Many network administrators have eased their workload by switching to using a DHCP server to configure client machines. In most cases, these machines do not run any services, so other machines never want to contact them, and so the lack of a corresponding entry in the domain name service is not a problem.

However, there are times when a machine requires a valid entry in the DNS. Traditionally, DNS has been set up by creating entries - called resource records - in text files called zone files. A typical address record for a host would look like this:

alpha        IN    A    10.0.0.52