web service is a software component that exposes itself through the open communication channels of the Internet. Applications running on remote machines, on potentially different platforms, can access these components in a language and platform-independent manner.A Web Service is a group of functions, packaged together for use in a common framework throughout a network.
WebSevice is a reusable software component (ClassLibraries) which exposes the businesslogic in them, platform independent, technology independent, language on which it is created, can be transported on HTTP (which is stateless) and provides the xml (Universal Accepted language which can be passed through firewalls) by exposing thruough SOAP (Simple Object Access Protocol) messages between the Caller and the component..
Webservice: Appropriate, when exposing the functionalitiss across differnt platforms(windows/Linux/Solaris..etc.,) or.NET to J2EE.
.NET Componet: Appropriate, when exposing the functionalitis within propritory O/S(.Net-.Net, or Java-Java platform)
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