What is the primary focus of computer network defense (CND)?

• A. Developing new software applications
• B. Monitoring and responding to unauthorized network activity
• C. Implementing physical security protocols
• D. Auditing user compliance with policies

Answer: (B)

The primary focus of computer network defense (CND) is monitoring and responding to unauthorized network activity. This involves actively observing network traffic to detect suspicious behavior, as well as identifying potential attacks or breaches in real-time. CND aims to protect the integrity, confidentiality, and availability of information within a network by implementing measures to quickly address and mitigate threats. This includes the use of intrusion detection systems, firewalls, and other security tools that help in analyzing and responding to security incidents as they occur.

This focus on monitoring and immediate response is crucial because it helps organizations safeguard their systems from intrusions and minimize the impact of any security incidents. In contrast, other options, like developing new software applications, implementing physical security protocols, or auditing user compliance, while related to overall cybersecurity, do not directly address the ongoing, dynamic nature of threats to a network that CND is designed to combat effectively.