HTTP Response Headers
HTTP headers sent in the response from the web server to the web browser or other client software
Cache-Control:Cache-Control: max-age=120
Content-Language:Content-Length:Content-Disposition:Content-Type:Content-Type: application/xhtml+xml;charset=UTF-8
Expires:Last-Modified:Location:Refresh:Transfer-Encoding:X-UA-Compatible:X-UA-Compatible: IE=8