Which of the following is the best description of directories and how they relate to identity management?

A.
Most are hierarchical and follow the X.500 standard.

B.
Most have a flat architecture and follow the X.400 standard.

C.
Most have moved away from LDAP.

D.
Many use LDA.

Explanation:
A: Most enterprises have some type of directory that contains information pertaining to the companys network resources and users. Most directories follow a hierarchical database format, based on the X.500 standard, and a type of protocol, as in Lightweight Directory Access Protocol (LDAP), that allows subjects and applications to interact with the directory. Applications can request information about a particular user by making an LDAP request to the directory, and users can request information about a specific resource by using a similar request