httpVersion

(Optional) Specify the maximum HTTP version(s) that you want viewers to use to communicate with CF. The default value for new distributions is `http1.1`. For viewers and CF to use HTTP/2, viewers must support TLSv1.2 or later, and must support Server Name Indication (SNI). For viewers and CF to use HTTP/3, viewers must support TLSv1.3 and Server Name Indication (SNI). CF supports HTTP/3 connection migration to allow the viewer to switch networks without losing connection. For more information about connection migration, see Connection Migration at RFC 9000. For more information about supported TLSv1.3 ciphers, see Supported protocols and ciphers between viewers and CloudFront.