Which of the following protocols is MOST likely to be leveraged by users who need additional information about
another user?

A.
LDAP

B.
RADIUS

C.
Kerberos

D.
TACACS+

Explanation:
A ‘directory’ contains information about users.
The Lightweight Directory Access Protocol (LDAP) is a directory service protocol that runs on a layer above the
TCP/IP stack. It provides a mechanism used to connect to, search, and modify Internet directories.
The Lightweight Directory Access Protocol (LDAP) is an open, vendor-neutral, industry standard application
protocol for accessing and maintaining distributed directory information services over an Internet Protocol (IP)
network. Directory services play an important role in developing intranet and Internet applications by allowing
the sharing of information about users, systems, networks, services, and applications throughout the network.
As examples, directory services may provide any organized set of records, often with a hierarchical structure,
such as a corporate email directory. Similarly, a telephone directory is a list of subscribers with an address and
a phone number.