CompTIA CASP+ Practice Test

Which network security measure is fundamentally necessary in environments with multiple security zones?

1. Periodic software updates

2. Segmentation controls to isolate data between zones

3. Controlled access lists on all connections

4. Multifactor authentication for all users

The correct answer is: Segmentation controls to isolate data between zones

In environments with multiple security zones, segmentation controls are essential because they enable the isolation of data and resources between different areas of the network. Each security zone can be designed to have its own security requirements, policies, and controls, allowing for a tailored approach to protecting sensitive information and systems based on the level of risk associated with that zone. Implementing segmentation helps contain potential security breaches, as a compromise in one zone can be restricted from affecting others. It creates barriers that limit unauthorized access and prevents lateral movement within the network, thereby improving the overall security posture. This approach is particularly beneficial in environments that handle varying levels of sensitive data, as it supports compliance with regulatory standards and fosters a more secure network architecture. While other options like periodic software updates, controlled access lists, and multifactor authentication are important components of a comprehensive security strategy, they do not address the fundamental requirement of establishing boundaries and isolating resources across different security zones, which is crucial in multi-zone environments.