Base station and wi-fi question.

Hi, I've tried to look through the forum to see if this question has been asked before but could not find it. Will the base station automatically attempt to connect to the strongest wi-fi signal available? I ask because I've recently been told that you need to change the settings to stop this happeneing but I can't find anywhere in the settings to allow you to do this. I'm a little dubious that this is the case because it seems like a security flaw if so but I thought it's better to ask and look stupid than not ask and never know. Our home base station is connected to our router with an ethernet cable and the connection is set as ethernet, which again makes me question if this is an issue. Thanks in advance Justin.