what is the difference between application server and web
server?

Answer Posted / ashutosh d

Webserver mainly handles the Http requests but app server
can be used to handle the http, rmi, TCP/IP and many more
protocols.
Webserver just handles the requests of the webpage - means
suppose, a html page(presentation layer) requests a data -
here script is written containing the business logic , then
it just give the response with the required data from the
database. Then the html page with script is used to show the
retrieved information.

In case of application server, it does the same thing, of
getting and gives the response but it can process the
requests. i.e. in this case, instead of script know how to
fetch the data, the script is simply used to call the
applications server's lookup service to retrieve and process
the data. i.e here, application server is used for
processing/applying logic.

The web server can be considered as the subset of app server

Now a days the threshold between the two servers is becoming
blurred because of xml, xhtml.

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