I have a single machine with an onboard NIC and a wireless adapter. I set this machine up on it's own domain so I can make this machine a head node.
When I first started the setup, I chose Topology 5 and it installed an Enterprise Adapter, but actually what I wanted to do was choose Topology 1. Now when I choose topology 1 it tells me it can't find a second adapter. I'm pretty sure when I first
selected topology 5, it created the enterprise adapter for me.
I also have seen a co workers machine who has a single NIC and he has a private and enterprise adapter but since he didn't do the setup, he isn't sure how it was created. Both the enterprise and private adapters have static ip addresses like (Ent)
192.168.0.1, (priv) 10.0.0.1 etc.