There may be many other wireless networks in your area. It is important that the wireless devices connect to the correct WLAN. This is done using a Service Set Identifier (SSID). At number 2 in Figure A11-2, the SSID is currently set to "linksys". This should be changed to an appropriate name for the WLAN.
The SSID is a case-sensitive, alpha-numeric name for your home wireless network. The name can be up to 32-characters in length. The SSID is used to tell wireless devices which WLAN they belong to and with which other devices they can communicate. Regardless of the type of WLAN installation, all wireless devices in a WLAN must be configured with the same SSID in order to communicate. If SSID broadcast is disabled, then devices must be manually configured with the SSID.