When a client makes a request, that request may have to travel through firewalls, proxies, gateways, or other applications. Each of these has the opportunity to modify the original HTTP request. The TRACE method allows clients to see how its request looks when it finally makes it to the server. A TRACE request initiates a "loopback" diagnostic at the destination server. The server at the final leg of the trip bounces back a TRACE response, with the virgin request message it received in the body of its response. A client can then see how, or if, its original message was munged or modified along the request/response chain of any intervening HTTP applications “Trace” is used simply as an input data echo mechanism for the http protocol. This request method is commonly used for debug and other connection analysis activities. The http trace request (containing request line, headers, post data), sent to a trace supporting web server, will respond to the client with the information...