This document formally deprecates Transport Layer
           Security (TLS) versions 1.0 (RFC 2246) and 1.1 (RFC 4346).
           Accordingly, those documents have been moved
           to Historic status. These versions lack support for current
           and recommended cryptographic algorithms and mechanisms, and
           various government and industry profiles of applications using
           TLS now mandate avoiding these old TLS versions. TLS version 1.2
           became the recommended version for IETF protocols in 2008
           (subsequently being obsoleted by TLS version 1.3 in 2018), providing
           sufficient time to transition away from older versions.
           Removing support for older versions from implementations reduces the
           attack surface, reduces opportunity for misconfiguration, and
           streamlines library and product maintenance.
     
      This document also deprecates Datagram TLS (DTLS) version 1.0
     (RFC 4347) but not DTLS version 1.2…