(Netstumbler is one of the most famous tools for finding wireless access points. Netstumble supports PCMCIA wireless network card and global GPS satellite positioning system. This tool is now free. It only supports the windows system. The source code is not public. Moreover, the developer of the software also reserves the right to modify the license agreement under appropriate circumstances. Netstumbler supports service set identifier (SSID), wiredequivalentprivacy WEP, open authentication, shared password authentication, MAC address authentication, etc. SSID (servicesetidentifier) technology can divide a wireless LAN into several sub networks requiring different authentication. Each sub network requires independent authentication. Only authenticated users can enter the corresponding sub network to prevent unauthorized users from entering the network. For different working groups in WLAN, through SSID identification, members can join the corresponding working groups without causing organizational chaos. Users on UNIX systems can download Kismet at this site to replace
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The best wireless scanning tool netstumbler)