The confirmation option supports the use case of 8.2.1.9: A Clientmay set a ConfirmationTimeoutbefore the installation. After every reboot of the Server caused by the update, it shall wait this time for a call to the Confirm Method.If the call is not received the Servershall perform a rollback to enable a working Client – Serverconnection again. This state machine is defined in 8.4.11.