How to Reset Network to Default

To reset Network Configuration to factory setting, here are the steps:

1. Turn off Wifi and unplug network connection;

2. Go to  /Library/Preferences/SystemConfiguration

3. Rename  preferences.plist  to  preferences.plist.bak  (just in case it is needed)

4. Reboot and a new preferences.plist will be created with the network configuration reset to factory default.