What are the differences in testing a client-Server and a
web Application
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Answer Posted / darshana
Client server is a 2-tier application. In this, front end
or client is connected to
'Data base server' through 'Data Source Name',front end is
the monitoring level.
Web based architecture is a 3-tier application. In this,
browser is connected to webserver through
TCP/IP and webserver is connected to Data base
server,browser is the monitoring level.
In general, Black box testers are concentrating on
monitoring level of any type of application.
All the client server applications are 2 tier
architecutures.
Here in these architecutre, all the "Business Logic" is
stored in clients and "Data" is stored in Servers. So if
user request anything, business logic will b performed at
client, and the data is retrived from Server(DB Server).
Here the problem is, if any business logic changes, then we
need to change the logic at each any every client.
The best ex: is take a super market, i have braches in the
city. At each branch i have clients, so business logic is
stored in clients, but the actual data is store in servers.
If assume i want to give som discount on som items, so i
need to change the business logic. For this i need to goto
each branch and need to change the business logic at each
client. This the disadvantage of Client/Server
architecture.
So 3-tier architecture came into picture:
Here Business Logic is stored in one Server, and all the
clients are dumb terminals. If user requests anything the
request first sent to server, the server will bring the
data from DB Sever and send it to clients. This is the flow
for 3-tier architecture.
Assume for the above. Ex. if i want to give som discout,
all my business logic is there in Server. So i need to
change at one place, not at each client. This is the main
advantage of 3-tier architecture.
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