The program can come in handy if you are using a WLAN and you donТ‘t have signal or it is not working properly. NetStumbler is a tool for Windows that allows you to detect Wireless Local Area Networks (WLANs) using 802.11b, 802.11a and 802.11g.Features: • Verify that your network is set up the way you intended. • Find locations with poor coverage in your WLAN. • Detect other networksthat might be causing interference with your network. • Detect unauthorized "rogue" access points in your workplace. • Help aim directional antennas for long-haul WLAN links. • Use it recreationally for WarDriving.