What is the difference between Web Server and Application server?

Web Server	Applilcation Server
Webserver serves pages for viewing in web browser.	application server provides exposes businness logic for client applications through various protocols.
Webserver exclusively handles http requests.	application server serves bussiness logic to application programs through any number of protocols.
Web Server Have Only Servlet Container  And  JSP Container	Application Server  Have Servlet Container ,JSP Container  And EJB Container.
Webserver delegation model is fairly simple,when the request comes into the webserver,it simply passes the request to the program best able to handle it(Server side program). It may not support transactions and database connection pooling.	Application server is more capable of dynamic behaviour than webserver. We can also configure application server to work as a webserver.Simply application server is a superset of webserver.