Refer to the exhibit.

What happens when one more user is connected to interface FastEthernet 5/1?

A.
All secure addresses age out and are removed from the secure address list. The security
violation counter increments.

B.
The first address learned on the port is removed from the secure address list and is replaced
with the new address.

C.
The interface is placed into the error-disabled state immediately, and an SNMP trap notification
is sent.

D.
The packets with the new source addresses are dropped until a sufficient number of secure
MAC addresses are removed from the secure address list.

Explanation:
Reference:
http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.1/19ew/configuration/guide/port_sec.pdf