Can multiple (NIC's, types, etc.) networks use a single DCHP?
 

I know a fair amount about setting up a simple network but I'm curious about setting up a more complex topology...

For example...

A "box" has two NIC's acting as a bridge, normally this would involve two distinct networks (ie. 192.213... and 192.214...) is it possible that this physical set up can create a single network (192.213... 192.213...) resolving IP's from either a DCHP on the "box" or a DCHP server somewhere else on "one side of the box"

likewise with differing physical network types, a "box" with a NIC and a TCP/IP over usb setup connected to another device with TCP/IP over usb (OTG/Gadget) so that all the IP's are on one logical network.

TIA

I believe it's called 'ethernet bridging' and is theoretically possible if supported at both ends. There is stuff in the kernel config about it which probably makes good reading. Google has much also. Start a howto - We might need it :-D.