A security administrator has installed a new KDC for the corporate environment. Which of the following
authentication protocols is the security administrator planning to implement across the organization?

A.
LDAP

B.
RADIUS

C.
Kerberos

D.
XTACACS

Explanation:
The fundamental component of a Kerberos solution is the key distribution centre (KDC), which is
responsible for verifying the identity of principles and granting and controlling access within a network
environment through the use of secure cryptographic keys and tickets.
Incorrect Answers:
A: 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.
B, D: RADIUS and XTACACS do not require a KDC to function.

Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp. 270-274