The configuration set that meets the requirements for configuring port security on a Cisco MDS 9000 Series Switch is Option C. This option includes the command port-security activate vsan 4 force, which initiates the VSAN 4 port security database despite any conflicts. It omits the auto-learn command, indicating that new devices must be added manually. Additionally, the port-security distribute command ensures that configuration changes are applied throughout the fabric and any locks on the fabric are released, as required1. References: = For more detailed information on port security configuration for Cisco MDS 9000 Series Switches, you can refer to the Cisco MDS 9000 Series Security Configuration Guide