This object reflects the status of the last requested test: * If a loopback had never been effected on an endpoint, this object reads noStatus (1). * If a destructive mode of loopback is configured on an endpoint, this object always reads lpbkInEffect(6). * If a non-destructive mode of loopback is in progress, this reads lpbkInProgress(2). * If a non-destructive mode of loopback has completed successfully, this reads lpbkSuccess(3). * If a non-destructive mode of loopback has aborted, either due to user request or switch's limitation, this reads lpbkAbort (4). * If a non-destructive mode of loopback has failed, this reads lpbkTimeOut(5).