Wireless LANS are often not secure. It is simple to bring WLAN (the ssid). The second column shows the last signal your laptop computer into a public area and listen for strength it detected, whereas the third column shows the wireless networks. This is called wardriving (if you are average signal strength. I used Net View from my parked in a car) or warwalking (if you're walking). As long as car on the street, so the signal strengths are not strong, and you do not attempt to use any networks without autho- because I wasn't moving, the average signal strength and rization, wardriving and warwalking are quite legal. There the last signal strength are the same. are many good software tools available for wardriving.You can examine the "PHY Types" column and My favorites are Net Surveyor (available from http:// that most APs are 802.11n, although there are three older nutsaboutnets.cometsurveyor-wifi-scanner/) or Wire- 802.11g APs. Values in the "Maximum Speed" column are less NetView (available from http://download.cnet.com/ quite variable. There are some newer 8011.n APs that are WirelessNetView/3000-2162_4-191039.html). Both are running at the top speed of 450 Mbps. Some 802.11n APs simple to use, yet powerful provide 144 Mbps, which suggests that these WLANs are The first step is to download and install the software likely to be older APs that are not capable of the higher on a laptop computer that has wireless capability. Just be speeds of newer 802.11n APs. You can also see that there careful what you download as these sites sometimes have are three 802.11g APs that provide only 54 Mbps. The other software on the same page. Once you have installed "Channel" column shows a fairly even distribution of chan the software, simply walk or drive to a public area and start nels 1, 6, and 11, indicating that most users have config it up. Figure 7-17 shows an example of the 13 networks ured them to use the three standard channels. However, I discovered in my home town of Bloomington, Indiana, the owner of the Fatjesse WLAN has configured it to run when I parked my car in a neighborhood near the univer on channel 2. sity that has a lot of rental houses and turned on WirelessAll the APs in this neighborhood were secure. T Netview. I rearranged the order of the columns in Netview, had implemented encryption. However, the very first AP so your screen might look a little different than mine when (2WIRE935) was using WEP which is a very old stan you first start up Netview dard. It's better than nothing, but its owner should switch to WPA or WPA2 NetView displays information about each wireless LAN discovers. The first column shows the name of the Read and complete the Hands-On Activity 7C on pages 218 to 220. (The beginning of the activity is listed above.) You will need to download and install WirelessNet View and then follow the directions in the Hands-On Activity. If you have problems finding WirelessNetView, then I have attached a zip file with it included You can also use your mobile device. Go to a strip mall or old fashioned mall and list the SSID and encryption methods of at least 5 Wi-Fi hotspots. Are these public or priva