What kind of network am I connecting to?

Question

I live in a building with free wireless internet. I get great signal (full signal actually). Normally when I connect to it, I launch my browser and a sign in page comes up to log in with a username and password.

I need to know what kind of setup this is called as I am having trouble keeping connected to the network with my new Mac.

I thought it was a WEP or WPA but apparently those kinds, you sign on in a window, not a webpage.

Answer 1

this is how this works
http://www.howtoforge.com/wifi_hotspot_setup