Wireless to wireless (to wireless)... I'm confused

[BCSteve]

Say I have Network A and Network B and they are independent, but within Network B is a server. A and B are within wireless range. How can A connect to B's server (but without full access to B's network) all via wireless?

Its probably simple, but I don't have a great understanding of these things. Are special routers required that can utilize two different wireless signals at once? Or two routers in each network (one to handle A/B and one to bridge A and B)?

Sorry for the stupid question... just kinda baffled. I'm sure once I get pointed in the right direction, I can learn more on my own.

 

[stevech]

To connect WiFi network A to B, i.e., for whatever reason no router/wired means is intended.... here's a common way...

WiFi network A has a WiFi router.
Network B (can) have a WiFi client bridge. This bridge device's antenna/WiFi is a client of network A, just like a laptop or handheld. But the bridge also has an ethernet port. A cat5 cable goes from that port to a PC or an ethernet switch with many PCs/devices on network B. Since Network B is a client of A, network B has no router. The bridge has to be setup with the encryption key and so on for Network A, as any client would. PCs on network B that use DHCP would get an IP address from the DHCP server (in the router) of Network A.

It can get more elaborate than this.

 

[BCSteve]

but then wouldn't A and B be in the same subnet?