When used as portal of WLAN authentication solution, what is rule of LDAP?

A.
An authentication server (AS) that communicates directly with, and provide authentication for supplicant.

B.
A SQL complaint authentication service capable of encryption key generation and distribution.

C.
AnX500 standard compliant database that participates in the 802.1X port-based access control process

D.
A data retrieval protocol used by an authentication server such as RADIUS.

E.
A role-based access control mechanism for filtering data to/from authenticated stations

Explanation:
As mentioned earlier, theauthentication server (AS)validates the credentials of a supplicant that is requesting access and notifi es the authenticator that the supplicant has been authorized. The authentication server will maintain a user database or may proxy with an external user database to authenticate user credentials. The authentication server and the supplicant communicate using a Layer 2 EAP authentication protocol. While it has been mentioned many times that a RADIUS server is a commonly used AS, others may be used. AnyLightweight Directory Access Protocol (LDAP)- compliant database can be used as the authentication server.