Answer Posted / dilshad
Web services are a standardized way for one application to
invoke a method of another application. These applications
may reside on different computers that are some way
connected, such as by a local area network or, more
commonly, by the Internet. With Web services you have two
actors, a client and a server. The server makes some set of
methods available. These methods, when called, will perform
some action and/or return some data. The client invokes one
of the available methods of the server. Like methods in a
class library, the methods of a Web service can accept an
arbitrary number of input parameters, and can optionally
return a result. The Web services standard spells out in
great detail how a client can invoke a Web service method
from a server. The standard dictates how input parameters
and return values are passed from one computer to the
other, how faults are handled, and a myriad of other
complications.
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