This tool covers every aspect of the Mac's network setup and you can look at all of its options by simply running networksetup by itself in Terminal to see a list of all supported command options. The utility for doing this is the command 'networksetup,' which can be used to quickly apply a change to a specific network property. However, you can also make these changes - adding and removing ports, creating new locations, switching to DHCP from manual configurations, changing MTU sizes, and managing 802.1x profiles, among others - via the command line. If you need to adjust network settings on your Mac, the quickest route is to do so through the OS X system preferences and menu extras.
