I should say at the start that I'm absolutely beginner in such things like networks. I tried to search but don't really know what to type to solve the problem.
I've just installed Ubuntu 11.04 on one of my computers (the one connected with the router). The router and the whole Wi-Fi network were 'installed' several months ago by a guy who knows a lot about IT.
I know he set the password and username or network name (?) on the Wi-Fi. But Linux automatically connected with the Internet. How is that possible? Isn't there a need to input this data on the main computer (I mean: connected with router)?
Hope it didn't connect by other way (like phone connection?) - because, you know, if it did, we may pay unimaginable costs.