Which protocol is not supported by CloudFront?

CloudFront, Amazon's content delivery network, primarily supports the transfer of web content over HTTP and HTTPS. This allows for secure data transmission and adheres to modern web standards that prioritize security.

When it comes to protocol handling, CloudFront does not support redirecting HTTPS traffic to HTTP. This is because doing so would undermine the security benefits provided by HTTPS, which encrypts data in transit to protect it from eavesdropping and tampering. Instead, the service allows for HTTP traffic to be redirected to HTTPS to ensure that users benefit from the security of encrypted connections.

Supporting the redirection from HTTPS back to HTTP would pose significant security risks and is contrary to best practices in web security, thereby confirming why this is not a supported feature within CloudFront’s functionality.