3.1.4.3 Version Record
If the record type the participant read from the protocol stream is not Version Record, it MUST be handled as described in section 3.1.4.2.
The participant MUST read the next two octets, which contain the major and minor versions of the protocol being used.
If the participant does not recognize the version, a Fault Record MAY<9> be sent to indicate that an incorrect version was specified, and the session MUST be closed.