Which of the following BEST describes the role of a directory server in a public key infrastructure (PKI)?

A.
Encrypts the information transmitted over the network

B.
Makes other users’ certificates available to applications

C.
Facilitates the implementation of a password policy

D.
Stores certificate revocation lists (CRLs)

Explanation:
A directory server makes other users’ certificates available to applications. Encrypting the information transmitted over the network and storing certificate revocation lists (CRLs) are roles performed by a security server. Facilitating the implementation of a password policy is not relevant to public key infrastructure ( PKl ).