💡 A. Change management practices to ensure operating system patch documentation is retained. This practice helps ensure that updates and patches are applied properly, reducing vulnerabilities. However, while this is important, it is more focused on system maintenance and patching rather than directly enhancing network security through configuration. B. User role requirements are documented in accordance with appropriate application-level control needs. While documenting user roles is essential for defining access controls, this option is more relevant to access management at the application level rather than network configuration. C. Validation of intrusion prevention controls is performed to ensure intended functionality and data integrity. This is a sound network configuration practice because validating intrusion prevention systems (IPS) ensures that the network is properly protected from unauthorized access or malicious activities. It also ensures the integrity of the data being transmitted across the network. D. Interfaces reinforce segregation of duties between operations administration and database development. Segregation of duties is critical for preventing fraud and ensuring operational integrity, but this is more related to role separation and access controls than directly improving network configuration security.