Response
code to be returned by Origin Server for missing fragments. If this
property is not configured, Origin Server returns 404 for missing fragments.
Use custom response code for missing fragments to implement failover
at the caching layer.
TTL Header values:
Specifies TTL values in integral seconds for various file types.
If
TTL values are not set up for a file type, the following headers
are set in the file type's http response: