nameserver address
This specifies the Internet address (in dot notation) of a name server that the resolver should query. Up to 3 name servers may be listed. The resolver queries them in the order listed. When a query to a name server on the list times out, the resolver will move to the next one until it gets to the bottom of the list. It will then restart from the top retrying all the name servers until a maximum number of retries are made.