Refer to the exhibit. A network security engineer must enable and configure port security on a Cisco Catalyst switch. Up to 20 secure MAC addresses must be support below the threshold and a syslog…

The `switchport port-security violation disable` command is not a valid port security violation mode; the correct options are protect, restrict, and shutdown.

The `switchport port-security violation restrict` command causes the interface to drop packets from unauthorized MAC addresses once the maximum number of secure MAC addresses has been reached, logs a syslog message, and increments the violation counter, fulfilling the requirement to log a message.

The `switchport port-security violation protect` command drops packets from unauthorized sources but does not log a syslog message or increment the violation counter, which fails to meet the requirement.

The `switchport port-security violation shutdown` command puts the interface into an error-disabled state upon violation, which is a more severe action than just logging a message and fails to specify the MAC address limit.