The Create New Network Interface wizard allows you to create a new interface according to your needs through a number of dialogs.
The dialog is a wizard where you add information in several steps.
The number of steps and their contents varies depending on the type of interface you create.
Note: As a last step you finalize the setup, but you can further edit the settings from the connections page.
In the first step, you can choose the type of interface: Uplink, Downlink, or Unmanaged.
Depending on your choice in the first step, different options become available.