Which action will bring an error-disabled switch port back to an operational state?

Question:
Which action will bring an error-disabled switch port back to an operational state?

• Remove and reconfigure port security on the interface.
• Issue the switchport mode access command on the interface.
• Clear the MAC address table on the switch.
• Issue the shutdown and then no shutdown interface commands.

Explanation: When a violation occurs on a switch port that is configured for port security with the shutdown violation action, it is put into the err-disabled state. It can be brought back up by shutting down the interface and then issuing the no shutdown command.

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