KAFKA-7251 support of TLS1.3 was introduced.
For now, only TLS1.2 and TLS1.3 are recommended for the usage, other versions of TLS considered as obsolete:
But testing of TLS1.3 incomplete, for now.
We should enable actual versions of the TLS protocol by default to provide to the users only secure implementations.
Users can enable obsolete versions of the TLS with the configuration if they want to.