CompTIA Security+ Question I-13

Which of the following protocols provides for mutual authentication of the client and server?

A. Two-factor authentication
B. Radius
C. Secure LDAP
D. Biometrics

Answer: C

C: The LDAP directory service is based on a client-server model. The function of LDAP is to enable access to an existing directory. Because it is a client-server model it makes provision for mutual authentication between the two parties.