Zend certified PHP/Magento developer

webmin: Handles the name-based server www.my-domain.org on address *

I need to configure our Apache web server to handle the domain name.

The phrase is like so:

webmin: Handles the name-based server www.my-domain.org on address *.

Why do we have:

Handles the name-based server www.my-domain.org on address *.

Why is it: *. and not *.*?