WI-FI INSPECTOR.

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1. Use your web browser to go to www.xirrus.com/free-tools (if you are no longer able to access the site through the web address, use a search engine to search for “Xirrus Wi-Fi Inspector”).
2. Click DOWNLOAD WI-FI INSPECTOR. Wi-Fi Inspector will run correctly under Windows 10, 8.1, 8.0, 7, and XP.
3. Enter the requested information and click Download Now.
4. When finished, launch Wi-Fi Inspector. The Wi-Fi Inspector is laid out in four tiled windows, each displaying different real-time information about the Wi-Fi networks that can be detected. The windows are Radar, Connection, Networks, and Signal History. This is shown in Figure 5-12.
5. On the Home tab, in the Layout group, click Show All … to return to the standard screen layout.
6. In the Settings group, click Settings.
7. Under Display Units, change the setting to Percent. Click Ok.
8. On the Home tab, click Networks to maximize the network screen.
9. Scroll through the list of Wi-Fi networks that are detected. Do you recognize all of them as known networks? Click the Signal (%) column to show the networks that are the most distant with the weakest signal first. What is the signal strength of the weak- est network signal?
   11.The Locate Mode can be used to help determine the location of a specific Wi-Fi net- work. This mode operates similar to a Geiger counter, using sound and visual infor- mation to indicate proximity. When in Locate mode, the selected network is highlighted in yellow on the Networks table, it is displayed on the Radar window, and the selected network is graphed in the History window. In addition, an audible beep sounds, the frequency of which reflects signal strength: the quicker the beep, the closer the network.
10. Select a network that has a weak signal and right click on it and select the Locate option. While carrying the laptop walk around in your area. How does the radar change? What about the beep sound? Why? How could an attacker use this?
11. To exit Locate mode, right-click on the selected network and select Exit Locate.
12. Are you surprised by the number of wireless network signals you can detect? Do you
    think the different owners of these networks are aware that their signal is accessible?

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