What is Application Server and Webserver and differences?
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According to me it is better explained here:
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All starting from
http://www.artima.com/lega
So, If I have to come to a conclusion:
Web Server can have programming logic in it (ASP/PHP/JSP etc.). Thus it is simmilar to an Application Server, that is accessed through Web Server.
The key difference can be seen in a Client/Brocker/Server distributed (sometimes called erroneously multi-tier) application, where the client is users browser (HTML, Javascript), broker1 is the web server (ASP/PHP/JSP), server1/brocker2 is the application server (services, beans, other worker processes), server2 is the database server (final validators, triggers, stored procedures) As you will see from this - you can have program logic on each stage of the Client/Brocker/Server model, but it is not a requirement of the model.
You can have application server without having web-server attached to it - for example you can access the application server using DCOM, SOAP (SOAP can use not only HTTP as a communication protocol) or some other technology (including your own server application with sockets-communication implementation)
Also you can use your application server in your intranet, and to not expose any interface from it, to the web.
Hope it is much clearer now.
Kind Regards,
Zlatin
Web Server software runs HTTP services and is able to host one or more Web Sites. Each sites is a collection of various documents and applications: html, graphics, links, etc that would form the Web. This contents is delivered to Web Clients over networks using http.
Application server software goes one step further. It is possible to develop and deploy applications implementing features of J2EE 1.3 (standard for developing multi-tier applications). Servlets, applets, JSP, EJB, JMX, JNDI, JDBC are among the technologies used to make this work. Finally, Application server is responsible for connecting client with database server and for serving information contained in them (often Application Server are called middleware).
Hope this help
JF
See this
http://www.serverwatch.com
Regards,
Baskaran
Business Accounts
Answer for Membership
by: jeffkearnsPosted on 2003-08-09 at 08:39:18ID: 9113969
A Web server simply serves pages (example: HTML) to your visitors.
Think of an application server as the "brains". It interprets any programming (examples: PHP, ASP, ColdFusion, but not HTML) and then passes this on to the Web server.
Another important piece is the database server. This is where your data is typically stored. Examples here are MS SQL Server, MySQL, and Oracle.
Have fun,
Jeff