you don't need Networking on unless you want to connect two Moodle sites together (or connect your site with a Mahara site). In that case, your Moodle site must be installed at a host with a unique host name. http://localhost is definitely wrong name for a production Moodle installation.
Moodle networking (MNet)
LAN computers not connecting
This discussion has been locked because a year has elapsed since the last post. Please start a new discussion topic.