Windows Service
a. It is an windows based service
b. Starts automatically when the windows starts
c. Cannot be consumpted by other application
d. Not supports any protocal
e. Windows services itself does some task in the background and does not required any use intervention
f. Can be hosted only in windows machine with .NET framework installed
g. It is an long running program
Web Service
a. It is web based service ie, internet based
b. It is located on remote and hosted in web server (IIS)
c. Web Services can be comsumpted by other application
d. Supports http, tcp/ip protocal
e. Some application need to be access the web service webmethod
f. Client could be any platform which supports web service and not necessary that the client should be only .NET
g. It can be used to transfer data thr the network
Hope it helps
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Mark it as answer if it helps
Thanks,
R.Vasanth
MCTS(SQL Server & BI)
http://bigdatatech.blogspot.com
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