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What security feature can prevent unauthorized modifications to container file systems?

  1. Read-only permissions

  2. Encryption at rest

  3. Access control lists

  4. Network segmentation

The correct answer is: Read-only permissions

Read-only permissions are a crucial security feature for preventing unauthorized modifications to container file systems. By setting the file system or specific directories within a container to be read-only, you effectively limit any process running within that container from making changes to the files or directories designated as such. This significantly enhances the security posture of a containerized application, as it reduces the attack surface by mitigating the risk associated with potential vulnerabilities that could allow an attacker to modify sensitive files. In implementing read-only permissions, you ensure that even if an unauthorized user or process gains access to the container, they would not be able to alter the content of those files. This is especially important for applications where integrity and consistency of data are critical. Other security features, while useful in their own right, do not directly address the issue of preventing modifications to the file system in the same manner. For example, encryption at rest protects data from being accessed without the appropriate keys but does not prevent changes to the data if access has already been granted. Access control lists manage user permissions and can provide a level of control over who can read or write data, but without the explicit restriction of read-only settings, unauthorized modifications could still occur. Network segmentation helps isolate components and restrict access at the network level, but