On the first floor the connection begins out of the wall and connects to a modem. That modem then connects to, for our purposes, Router A, a DGND3700 Netgear. That router then has an outgoing ethernet cable that goes back up through the roof to the second floor and across the house towards my bedroom. It ends at the entrance to my room and goes into Router B, a WRT54G. That router then has another outgoing ethernet cable that plugs directly into my (this) desktop.
The network map as per Windows looks like this:
When I type in 192.168.0.1 into my browser it prompts me to log in to the router downstairs.
However, and here comes the tricky part, I'd like to connect my brother's desktop who is in the bedroom right next to me to the internet as well. I can't connect him directly the way I do with this computer for reasons I won't get into. His wireless connectivity to the router downstairs is very poor. Router B serves two purposes: a) essentially act as an extension to the ethernet cable to my room and b) provide a much closer router for my brother to connect to.
My question is the this: is it possible for Router B to broadcast a different network than Router A such that I will be shown as being directly connected to Router B while my brother will be wireless connected to the network it's broadcasting, all the while my dad downstairs will be connecting wireless to Router A's network? Or is something like this completely out of the question?
Up until tonight there was a much different network map than the one shown above and I believe I did have my brother connected wireless to Router B. I was never sure which network I was technically on because I had internet either way. Everything changed tonight because my brother suddenly lost connection to Router B and when I went to view the network map I saw what you see above. I couldn't connect my brother to the router I thought I had him connected to.
Any help is greatly appreciated. I know it seems a little complicated but I'm hoping that someone can explain how this is working exactly. I'm greatly interested in knowing how exactly Router B is currently acting the way it is as simply an 'extension' of sorts and how to get it to act like a second router for the second floor, if that's even possible.