To enable the service advertising, select either or both check
boxes.
Note -
If you set a preferred host name for IPv4 and/or IPv6, you can use
that host name as the zero configuration .local host name, that is,
<preferred_host_name>.local, where <preferred_host_name> is the
preferred host name you specified for the HPDU. The IPv4 host name is
the first priority. If an IPv4 host name is not available, use the IPv6
host name.