Abstract
DNS stands for Domain Name System. DNS is what allows you to specify a machine by its name instead of its IP address. This wizard, however, will not let you configure a DNS server (if you wish to do so, you will have to do it by hand), instead it will let you specify which external name servers you want to use.
The wizard asks you for two addresses (not names!) to two DNS servers (Figure 8.4), if you do not have any secondary name server just leave that field blank.
The DNS domain for the local network is automatically extracted from the domain name specified during the local server configuration.
This step will also automatically configure a caching DNS server, speeding up Internet DNS requests made from the local network.