The main purpose of an Acceptable Use Policy (AUP) is to serve as a foundational administrative control that clearly communicates an organization's expectations to users. It defines the rules, responsibilities, and acceptable behaviors for individuals accessing and using corporate information technology (IT) resources, such as networks, computers, and data. The AUP explicitly outlines what activities are permitted and prohibited, thereby establishing a clear standard of conduct. This policy is crucial for managing risk, protecting organizational assets, and providing a formal basis for enforcing security rules and taking disciplinary action in case of violations.

B. Monitoring is a technical or procedural control used to enforce policies like the AUP, not the primary purpose of the policy document itself.

C. This describes a Password Policy, a specific document that sets standards for password creation and management, which is often referenced within a broader AUP.

D. While an AUP is a critical component that contributes to security, its specific purpose is to govern user behavior, not to be the sole mechanism that "ensures" security.

1. National Institute of Standards and Technology (NIST) Special Publication 800-53

Revision 5

Security and Privacy Controls for Information Systems and Organizations. Control PL-4

"Rules of Behavior

" directly corresponds to the function of an AUP. The control states that an organization must "establish and make readily available to individuals requiring access to the system the rules that describe their responsibilities and expected behavior with regard to information and system usage." This directly supports that the purpose is to inform users of expectations.

2. National Institute of Standards and Technology (NIST) Special Publication 800-12

Revision 1

An Introduction to Information Security. In Section 4.2.1

"Policies

" it is stated that "Policies are the documents that codify an organization’s security requirements

responsibilities

and expectations." This aligns with the AUP's role in communicating expectations for system use.

3. Stanford University

Administrative Guide Memo 6.2.1

Computer and Network Usage Policy. The "Purpose" section of this policy states its goal is to "ensure that use of these resources is consistent with the university's educational goals and legal obligations." This exemplifies how an AUP's primary function is to define the expected and appropriate use of systems.