what is web server?

Answer Posted / uday kumar_anem

A web server is a software which just receives HTTP
requests from clients(browsers) and processes the request
and sends back the HTTP response to the client.
Once it receives the request it can send that request to
any of the CGI scripts/JSP/ASP, and once the response is
received from this script, it just again sends the response
to the client.

Whereas in application server provides business logic to
the client. It is like we are calling functions/methods.
Here each of these business logic is provided as a service.
Here also, the application server receives the request from
the script, and sends that request to the specific service
with proper parameters. The output from the service will
again sent back to the client.

WebServer is a subset of Application Server.

For more information, go through the below link:
http://www.javaworld.com/javaqa/2002-08/01-qa-0823-
appvswebserver.html?page=1

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