Most wireless devices including laptops, tablets and smartphones have network software that automatically connects to access points they remember. This convenient feature is what gets you online without effort when you turn on your computer at home, the office, coffee shops or airports you frequent.
Simply put, when your computer turns on, the wireless radio sends out probe requests. These requests say “Is such-and-such wireless network around?” The WiFi Pineapple Mark IV, powered by Jasager — German for “The Yes Man” — replies to these requests to say “Sure, I’m such-and-such wireless access point – let’s get you online!”
And with the newly improved Pineapple Mark IV web interface, gathering interesting packets, spoofing DNS, watching web traffic and more is just a click away.