What Distributed Computing Environment (DCE) component provides a mechanism to ensure that
services are made available only to properly designated parties?

A.
Directory Service

B.
Remote Procedure Call Service

C.
Distributed File Service

D.
Authentication and Control Service

Explanation:
A directory service has a hierarchical database of users, computers, printers,
resources, and attributes of each. The directory is mainly used for lookup operations, which
enable users to track down resources and other users…The administrator can then develop
access control, security, and auditing policies that dictate who can access these objects, how the
objects can be accessed, and audit each of these actions. – Shon Harris All-in-one CISSP
Certification Guide pg 436-437