An administrator has connected devices to a switch and, for security reasons, wants the
dynamically learned MAC addresses from the address table added to the running configuration.
What must be done to accomplish this?

A.
Enable port security and use the keyword sticky.

B.
Set the switchport mode to trunk and save the running configuration.

C.
Use the switchport protected command to have the MAC addresses added to the
configuration.

D.
Use the no switchport port-security command to allow MAC addresses to be added to the
configuration.

Explanation:
http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/
port_sec.pdf
One can configure MAC addresses to be sticky. These can be dynamically learned or manually
configured, stored in the address table, and added to the running configuration. If these
addresses are saved in the configuration file, the interface does not need to dynamically
relearn them when the switch restarts, hence enabling security as desired.