3.3.5.2 Sending a Select Version Response
The structure and fields of the Select Version Response message are specified in section 2.2.2.2.
The server sends this message in response to the Select Version Request (section 2.2.2.1) message. The Version field MUST be set to the maximum version number supported by the server which is not greater than the version number received from the client in the Select Version Request message.