AIRE is an 802.11 network discovery utility for Microsoft Windows XP. Upon finding a wireless access point, it displays pertinent information (timestamp, ESSID, channel, mode, etc) and has various useful features like a power meter display and other APs within range.
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K9 is a Windows tool for passive OS detection. It uses WinPCAP to capture network traffic and a user friendly interface to handle results, fingerprint database, etc.
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