Answer Posted / rajendra prasad reddy

hai friends,
here the difference lies only in the
architechture.

Normally The client server system will be 2-tier and web
based system will be 3-tier or n-tier.

In 2-tier Client - Server architechture,A application
program will be installed in the client system.
This application program we can also call it as Client tool.
and the second important part in client server
architechture is Server or Back end database.
The client tool or application program used to send queries
to server/backend database,to retrieve info and present on
client side.
For eg: client front end client tool or application program
may be developed in Visual Basic.
the front end(client tool)will be connected to database
through DSN(data source name).
In client-server the client and the server will be located
in the same office and it's users are limited in number,
Typical range is 50 -500 clients.

Inreal two tier architechture cannot handle more than 50
clients at a time.

so A modified client server architechture is developed.
this Modified client-server architechture exactly resembles
web 3-tier architechture.
There are three important layers in three tier architechture
They are
1.FrontEnd (Browser)
2.Webserver(like apache)
3.Database sever(like oracle,SQLServer,MySQL..etc)
The modified Client Server architechture uses the same 3-
tier web based architechture.
One more important point is Client Server users are limited
and number is predictable.
But in the case of web based architechture the users are
unlimited and number is unpredictable.
In client-server environment we know the client enviroment
needs like broswer type and system Hardware configuration
and required pluins.
But In the case of WebBased environment no one can predict
that the user attempts access information from which system
in the world wide internet and its configuration both S/w
and H/w.
the web application must be browser independent,i mean that
it should work on different types of browsers like
Mozilla fire Fox,
Internet Explorer,
NetscapeNavigator..etc.
and also on different versions of each browser.
And also Security also one of important in web application
testing.

So friends the bugs are different types we cannot expain
in this small notepad window.

ok
byeeeeeeeeeeee

rajendra_penumalli@yahoo.com
Hyderebad.

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