0 Why HTTP protocol is Stateless protocol

HTTP protocol is Stateless protocol

In HTTP protocol, Web servers and web browsers will transfer hypertext and images (sometimes files like swf etc also).
When a client (Web browser) makes a request for a page or a file, the web server locates it and send back the requested file. Once the web server sends the requested file back to the web browser, there ends the connection.
No session or state is maintained between the client and server, Otherwise it would increase the overheads of keeping a lot of sessions alive between the client and the server that would pose a serious performance issue. While this model scores from a performance viewpoint, it becomes a severe constraint when designing applications for the Web which needs session tracking.