I purchased AT&T Broadband Internet service through Comcast's cable service and configured my network settings with their installation CD, but it seems to have done a few redundant things to my system that I'm trying to cleanup. First, in System Preferences => Location, it added a new entry which uses the Built-in Ethernet port to get DHCP settings from the router. Second, it seems to have added the same function in System Preferences => Location but this time in => Automatic, by adding a new port called Broadband; that is get DHCP settings from my router.
First, can I safely delete one of these entries?
And does it matter which one?
Second, the installation CD seems to have disabled the Built-in Ethernet under System Preferences => Location => Automatic, that is, it no longer gets DHCP settings from the router. Is there a way to get back that functionality? And if so, can I safely delete both of the configurations that the installatIon CD added and still get through to the Cable modem?
Third, what does their installation CD actually do the system?