D-Link DAP-3410 User Manual page 21

Section 3 - Configuration
Key Size: Select 64.Bits or 128.Bits for your key size.
RADIUS Server: Enter the IP address of your RADIUS server.
RADIUS Port: Enter the RADIUS port.
RADIUS Secret: Enter the RADIUS secret.
D-Link DAP-3410 User Manual
802.1x Authentication
21