D-Link DSL-2880AL User Manual page 38

Section 3 - Configuration
WPA / WPA2 (Enterprise)
Some network-security experts now recommend that wireless networks
use 802.1X security measures to overcome some weaknesses in standard
WEP applications. A RADIUS server is used to authenticate all potential
users. .
Enter your RADIUS server data: IP Address, Port, and Key.
Click on the Apply Settings button to apply settings.
D-Link DSL-2880AL User Manual 38