Appropriate documentation is critical if an employee is dismissed due to violation of an organization's Acceptable Use Policy (AUP). An AUP is a policy that defines the acceptable and unacceptable use of the organization's information systems and resources by the employees. A violation of the AUP can result in disciplinary actions, such as warnings, suspension, or termination. Appropriate documentation can provide evidence of the violation, the investigation process, the communication with the employee, and the decision of the dismissal. Appropriate documentation can also protect the organization from legal challenges or disputes from the dismissed employee. References: CISSP All-in-One Exam Guide, Eighth Edition, Chapter 1: Security and Risk Management, page 38; [Official (ISC)2 CISSP CBK Reference, Fifth Edition, Chapter 1: Security and Risk Management, page 100]

Explanation/Reference:
Explanation:
Each node on an IP network must have a unique IP address.
Incorrect Answers:
B: IP hosts use IP addresses, not MAC addresses.
C: There is no such thing as a TCP address in the TCP/IP model.
D: There is no such thing as a datagram address in the TCP/IP model.
References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 541

"Security Modes
In a secure environment, information systems are configured to process information in one of four security modes. These modes are set out by the Department of Defense as follows:
Systems running compartmental security mode may process two or more types of compartmented information. All system users must have an appropriate clearance to access all information processed by the system but do not necessarily have a need to know all of the information in the system. Compartments are subcategories or compartments within the different classification levels and extreme care is taken to preserve the information within the different compartments. The system may be classified at the Secret level but contain five different compartments, all classified Secret. If a user has only the need to know about two of the five different compartments to do their job, that user can access the system but can only access the two compartments. Compartmented systems are usually dedicated systems for each specific compartment to prevent the chance of any errors, because compartmentalization is the most secret of all the secrets.
Systems running in the dedicated security mode are authorized to process only a specific classification level at a time, and all system users must have clearance and a need to know that information.
Systems running in multilevel security mode are authorized to process information at more than one level of security even when all system users do not have appropriate clearances or a need to know for all information processed by the system.
Systems running in system-high security mode are authorized to process only information that all system users are cleared to read and to have a valid need to know. These systems are not trusted to maintain separation between security levels, and all information processed by these systems must be handled as if it were classified at the same level as the most highly classified information processed by the system."
Pg. 234 Tittel: CISSP Study Guide

All hosts on a network have a logical ID that is called an IP address. An IP address is a numeric identifier that is assigned to each machine on an IP network. It designates the location of a device on a network. A MAC address is typically called a hardware address because it is "burned" into the NIC card. TCP address and Datagram address are imposter answers.
Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the
Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 87.