Network from NUC BIOS - should it work?

Hi,

I noticed that there is a network options in NUC Live BIOS that looks like should be able to access network from within BIOS.

However in my case it does not.

I connected NUC (5i5RYH) using 1GB wire connected to router with DHCP server enabled. It works fine when I boot into a Windows 10 but from Live BIOS it's always no connection and looks like no IP as well.

(of course NIC enabled etc.)

Any idea should it work at all? ::) And if "yes" how to make it work.

Also, I interested to know  what it can be used for besides BIOS updates?

Thank you.