單項(xiàng)選擇題

Refer to the exhibit. 
What will happen when one more user is connected to interface FastEthernet  5/1？（）

A. The first address learned on the port will be removed from the secure address list and be  replaced with the new address.
B. All secure addresses will age out and be removed from the secure address list. This will cause  the security violation counter to increment.
C. The packets with the new source addresses will be dropped until a sufficient number of secure  MAC addresses are removed from the secure address list.
D. The interface will be placed into the error-disabled state immediately， and an SNMP trap  notification will be sent.

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