weird wifi connection

[judeimran]

im on public wifi... normally only the wireless network connection lights up but on rare occasions the broadband connection connects and both seems to connected.... i noticed that this happens when keep switching between 2 public wifi connections (less ppl). If i disconnect the broadband connection the current connection would have no data transmitted although wireless network is still connected.. thus i switch back to the other wifi network (which works albeit slower.....)

is there a reason why my broadband connection was activated ?? also can't reactivate the broadband connection if i disconnect it.... this doesn't happen often but it bugs the hell out of me.....

if any1 could answer me ... thanks...

[kronos_fir18]

sometimes window will connected automatically to public connection coz,window will automatically detect the conncection when the same/usual wireless network is available...

[Rush]

When you say broadband, do you mean your wired connection?
Either way I would look to control the connections at the firewall level. Most of the free ones support network based rules, meaning you can set up different rules for each connected network. I know Zone Alarm does, and I believe Comodo does as well.
I would create a set of rules to either block the unwanted or unknown connection, or to make it so that it must ask for permission each time.
Also I would use some kind of packet capture software to find out what is being sent over the connection and to whom. For this I would recommend Wireshark.