LAB
Your task is to configure the Fa0/12 interface on the switch to limit the maximum number of MAC addresses that are allowed to access the port to two and to shutdown the interface when there is a violation.

Answer: See the explanation

Explanation:
Switch1>enable
Switch1#config t
Switch1(config)#interface fa0/12
Switch1(config-if)#switchport mode access
Switch1(config-if)#switchport port-security maximum 2

Switch1(config-if)#switchport port-security violation shutdown
Switch1(config-if)#no shut
Switch1(config-if)#end
Switch1#copy run start