JSP (Java Server Pages)

They are a direct extension of Java servlets and provide a way to separate content generation from content presentation. JSP gives us a way to glue together HTML, Java code and components by simply creating a special webpage that will be dynamically compiled in to a servlet the first time it is called.

When a request is made for the JSP document , the server recognizes the *.jsp extension and realizes that special handling is required and processed in the following format.

Client requests a JSP page
JSPEngine compiles the JSP into a servlet
The generated servlet is compiled and loaded.
The compiled servlet services the request and sends back the response to the client.

Web Browser
A web browser can be thought of as a Universal user Interface responsible for
Presenting web content
Issuing requests to the web server and
Handling any results generated by the request.

Web server
Webserver is a program running on the server that listens for incoming requests and services those requests as they come in depending up on the type of request. It might search for the requested page or at times execute a program on the server architecture.

Servlet Engine(Servlet Container)
Servlet interface to a particular server architecture through a set of standard interface called Servlet Engine (to run servlets we just can use any web server ,since servlets can be run using a standalone servlet engine the web server doesn’t need to support servlets).