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