A company wants to test the impact of a security policy before enforcing it and...

Comprehensive and Detailed Explanation From Exact Extract of Nutanix End User Computing documents:

According to Nutanix Flow Network Security Guide:

Policy States: Security policies in Nutanix Flow have two primary operating modes: Monitor and Enforce.

Monitor Mode: In Monitor Mode (Option A), the policy rules are evaluated, and traffic that would have been blocked is logged, but the traffic is allowed to pass.

Use Case: This is explicitly designed for the scenario described: "testing the impact... before enforcing." It allows the administrator to visualize the flow logs (via the Visualizer) to ensure no legitimate traffic would be dropped, before switching the toggle to Enforce Mode (Option B) which actually blocks the traffic.