ADSL 4-Port Ethernet USB Wireless-G Router User Guide
WPA is the short term for WiFi Protected Access. WPA is an industry-supported,pre-standard version of 802.11i that utilizes the Temporal Key Integrity Protocol (TKIP), which fixes the problems of WEP, which includes using dynamic keys.
Figure 1-17 : Wireless Security
ADSL 4-Port Ethernet USB Wireless-G Router User Guide