LOM (NIC) is what it's named on my server. It's where my Ethernet cable is connected to our Gigabit switch.
From my previous experience too with 2008 R2, it's automatic and takes the IP address and configure it to itself while hiding the original Ethernet port.
Now, it's not the case as shown on the figure above.
I have (4) LOM ports actually. NIC1=LOM, NIC2=LOM1, etc..