I have never set up a connection to an access point before, but I know that when I connect to my router my laptop can only connect to that. I have set a unique ssid and set it on channel 11. Now I have enabled encryption (128 bit) and created a passphrase. When the laptop starts up it can only connect to the router that matches the 128 bit algorithm, ssid, and channel, if it doesn't then it cannot connect at all. Hopefully the access points are the same way. I know that on the laptop in the wireless card config menu there's an option to have it "automatically connect to any available wireless network" and I have disabled that option. Of course I am using a netgear card and a belkin router, dell may be different.