Which option is the default switch port port-security violation mode?

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Question:
Which option is the default switch port port-security violation mode?

shutdown
protect
shutdown vlan
restrict

Explanation: Shutdown is the default switch port port-security violation mode. When in this mode, the switch will automatically force the switchport into an error disabled (err-disable) state when a violation occurs. While in this state, the switchport forwards no traffic. The switchport can be brought out of this error disabled state by issuing the errdisable recovery cause CLI command or by disabling and re-enabling the switchport.

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