what is the difference between application server, web server and portal server?

i want to know the difference between windows 2000 and windows 2003 server

Hi
web server is used to serve web based applications.(i.e servlets and jsps)
application server is used to serve web based applications and enterprise based applications(i.e sevlets, jsps and ejbs...). because application server contains web server internally.

what is the difference between applicatyion serrver and web server

hi vandahana

A Web server handles the HTTP protocol. When the Web server receives an HTTP request,
it responds with an HTTP response, such as sending back an HTML page. To process a request, a Web server may respond with a static HTML page or image, send a redirect, or delegate the dynamic response generation

Application server

An application server exposes business logic to client applications through various protocols, possibly including HTTP. While a Web server mainly deals with sending HTML for display in a Web browser, an application server provides access to business logic for use by client application programs. The application program can use this logic just as it would call a method on an object

Thanks
Deepasree

hi to all,

Apllication Server means we can store applications (DATA) in that Server & it manage the entire clints systems. web server means we can access internet ( what company given permissions to clints according to that we can use web applications ).

Difference still not very much clear.Can anyone tell me examples to claify these differences?

Hai,
portal server
A "portal server" is just an application server running a portal sofware or a portal application (Microsoft Sharepoint Portal Server is an example).
application server
An application server is a system that provides the execution environment that is at the core of network computing or web-based architectures, providing a full set of services.
Web server
A computer that delivers Web pages to browsers and other files to applications via the HTTP protocol. It includes the hardware, operating system, Web server software, TCP/IP protocols and site content (Web pages and other files). If the Web server is used internally and not by the public, it may be called an "intranet server."

Regards,
Nithya.R

can you let me know the real time example to clear the same as still i m not getting.

Microsoft Sharepoint Portal Server

Google Suggest and Google Maps are two examples of web server

hai,
i dont knw the examples clearly,if you know pls tel to me

the reply given by you i've found on one of site but this will not serve my purpose i need real life example for clear understanding.

ok.it u come to know,then tell to me also

its same as answered by you.

"App server, Web server: What's the difference?" Java Q&A author Tony Sintes summarized the distinction as follows:

"A Web server exclusively handles HTTP requests, whereas an application server serves business logic to application programs through any number of protocols, including HTTP [...] While a Web server mainly deals with sending HTML for display in a Web browser, an application server provides access to business logic for use by client application programs. The application program can use this logic just as it would call a method on an object (or a function in the procedural world).

Such application server clients can include GUIs (graphical user interface) running on a PC, a Web server, or even other application servers. The information traveling back and forth between an application server and its client is not restricted to simple display markup. Instead, the information is program logic. Since the logic takes the form of data and method calls and not static HTML, the client can employ the exposed business logic however it wants.

In most cases, the server exposes this business logic through a component API, such as the EJB component model found on J2EE application servers. Moreover, the application server manages its own resources. Such gate-keeping duties include security, transaction processing, resource pooling, and messaging. Like a Web server, an application server may also employ various scalability and fault-tolerance techniques."

Plz let me clarify it with any example

hi,u want the examples of webserver and application server. right?
webserver - any company's website, it responds with a static or dynamic html pages for each click providing the information you requested
application server - any business application such as icicibank,hdfc or any bank website as in these sort of applications, you not only click the login button, after that u logon giving credentials,check your balance, transfer money online, some business operations you are doing. these things you can not do in web applications.indirectly, these applications are called as enterprise applications.many more to tell u.but hope u understood.