CCNA Discovery 1, Chapter 7

7.3.1 and 7.3.2: Unauthorized users attempt to tap into a wireless LAN to obtain free Internet service and possibly steal data from the WLAN. Often an AP signal reaches outside a building or the desired range of the administrator. To avoid malicious war drivers or war walkers, an administrator should implement the following security features on a WLAN during initial setup:

• SSID broadcast: You can disable the SSID broadcast feature and require anyone connecting to the network to know the broadcast SSID. However, the SSID is transmitted in clear text, so it is not difficult to discover the SSID for a network.

• Default settings: You can change the default settings on your AP, including usernames, passwords, IP addresses, and the SSID to make it more difficult for an intruder to discover the unique settings.