This attribute is a port security configuration object. Setting the value to 'disabled' will allow the switch to learn new MAC addresses as they come in. In enabledLearningLocked mode, the device will stop learning new addresses and the old addresses that the device has learned will be locked. In enabledLimited mode, only a limited number of addresses will be learned. In enabledSecured mode, the administrator is responsible for entering the MAC addresses manually. By doing this, the administrator knows exactly who is connecting to the switch.