D-Link DAP-3310 User Manual page 22

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-3310 User Manual
802.1x Authentication
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