LDAP and RADIUS are both remote authentication servers that FortiGate can tie into for authentication. What is a key difference between these servers?

LDAP and RADIUS are both remote authentication servers that FortiGate can tie into for authentication. What is a key difference between these servers?

Response:
A . Only LDAP can have a secure connection with FortiGate using a server certificate.
B . Only LDAP can be configured to authenticate groups as defined on the LDAP server.
C . Only LDAP provides authentication, authorization, and accounting (AAA) services.
D . Only RADIUS requires a distinguished name (i h.) to locate user records.

Answer: A