... Media types relate to HTML as follows: . When a Web server sends an HTML document, it should specify the correct media type ( text/html ) in the HTTP headers it sends along with the document. ... You can check what is the media type information sent by a server as follows: Assuming we are interested in the media type of the document at URL http:// host / path , establish a Telnet connection to host using the port number in the URL if present, port 80 otherwise. ... HEAD / path HTTP/1.0 . ...