Domain name field: The name that is put at the end of all DNS searches if they fail. It is also stripped from output. This name should be your local domain name.

Primary server field: The IP address of the first server to use when resolving hostnames. This address should be a host running a DNS server.

Secondary server field: (Optional) The IP address of the server to use when resolving hostnames if the Primary server does not respond. This address should be a host running a DNS server.

Tertiary server field: (Optional) The IP address of the server to use when resolving hostnames if the Primary and Secondary servers do not respond. This address should be a host running a DNS server.

Apply button: Applies the parameters on the current page to the running system.