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what is the difference between application server and web
server?
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Answer Posted / reddy
Webserver serves pages for viewing in web browser,
application server provides exposes business logic for
client applications through various protocols.
Webserver exclusively handles http requests. application
server serves business logic to application programs through
any number of protocols.
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 behavior
than webserver. We can also configure application server to
work as a webserver.Simply application server is a superset
of webserver.
Web Server serves static HTML pages or gifs, jpegs,
etc., and can also run code written in CGI, JSP etc. A Web
server handles the HTTP protocol. Eg of some web server are
IIS or apache.
An Application Server is used to run business logic or
dynamically generated presentation code. It can either be
.NET based or J2EE based (BEA WebLogic Server, IBM
WebSphere, JBoss).
A J2EE application server runs servlets and JSPs (infact
a part of the app server called web container is responsible
for running servlets and JSPs) that are used to create HTML
pages dynamically. In addition, J2EE application server can
run EJBs – which are used to execute business logic.
An Application server has a ‘built-in’ web server, in
addition to that it supports other modules or features like
e-business integration, independent management and security
module etc.
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