[Sussex] WiFi question

[John Crowhurst]

I've just installed my first WiFi setup in my parent's house so that my
sister can share my samba network and use the internet via the firewall.

I was wondering, how many WiFi 802.11 networks can you have in close
proximity? Can I have multiple WAPs on different IP addresses, and have
multiple networks off that, or am I simply limited to the frequencies that
WiFi works on?

I'm just thinking of how it would be possible to network a large company
with many computers.

--
John