CloudFront recently announced HTTP/3 support. I wanted to add it to the CloudFront distributions at work. I looked at the AWS Terraform Provider docs for setting the HTTP version. It said: The maximum HTTP version to support on the distribution. Allowed values are http1.1, http2, http2and3 and http3. The default is http2. I was confused about the difference between http2and3 and http3. I looked at the CloudFront API docs, which said pretty much the same thing as the Terraform docs.