You must enter the domain name. A domain name is a bunch of name glued together with colons. For example
solucorp.qc.ca
can be read as the sub-domain solucorp
, part of the sub-domain
qc
, itself part of the top-level domain ca
.
Unless you have an isolated network, you must request an official
domain name. Say you want to register the domain foo.com
, you
will have to request permission to the authority managing the
domain com
. If later you want to setup the domain
sub.foo.com
, you will have to ask ... yourself, since you
will be the authority of the domain foo.com
.
Your Internet provider will help you selecting a proper domain name.
If you are not connected to the Internet, you are free to setup any domain you want.