Network Defense Essentials (NDE) Practice Exam 2025 – Your All-in-One Resource to Exam Success!

Enabling read-only mode on file systems and volumes is a key practice for securing a Docker environment because it minimizes the risk of unauthorized changes to the data stored within containers. By placing a container in read-only mode, you prevent any modifications to the filesystem, which can help to thwart potential attacks. An attacker who gains access to a container would have limited ability to alter data or introduce malicious files, thus enhancing the overall security of the environment.

This approach also aids in maintaining the integrity of applications running within the container, as it ensures that they can only read data, not write to it. This method is part of a broader security posture, where limiting permissions and access is critical in defending against threats. By implementing read-only filesystems and volumes, organizations can better protect sensitive information and ensure that the container's environment remains reliable and predictable.