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.

a)	The bugs of the client server testing: -
1)	Functional bugs
2)	User inter face bugs
3)	Input domain bugs
4)	Error handling bugs
5)	Calculation bugs
6)	Load conditions bugs
7)	Hardware related bugs
8)	Version control bugs
9)	Id control bugs
10)	Source bugs
11)	Rise conditions bugs
12)	Cosmetic bugs
13)	Data corruptions
14)	Data loss
15)	And so on
b)	The bugs of the web based testing: -
1)	The above are related the web based testing and 
more have. They are
2)	URL bugs
3)	Browser bugs
4)	Banked bugs
5)	Fronted bugs
6)	Linked bugs
7)	Must transfer the data bugs
8)	Lot of times bugs
9)	Slow performance
10)	Unexpected features
11)	Unfriendly behavior
12)	Not support to the all Internet software?s bug
13)	And so and

If you want diff of the CST and WST send mail
My name is k.chandra sekhar
My phone no is 09246540049
I am in hyderabad
My mail id is ndra_143@yahoo.co.in 
If any body want full explain send that mail

Rajendra and Chandra Shekhar both of your answers are 
really useful for newcomers like me.
Thank u

thank you for your answers .ialso have the same dobt .now i 
got cleared.please post the answewrs for us .

Thanks for the answers, this is the answer i exactly 
seeking for. Thanks guys!