what is webservices ? and what is web server ?

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what is webservices ? and what is web server ?..

Answer / rajesh

Web services (sometimes called application services) are
services (usually including some combination of programming
and data, but possibly including human resources as well)
that are made available from a business's Web server for Web
users or other Web-connected programs.

A web service (also webservice) is traditionally defined by
the W3C as "a software system designed to support
interoperable machine-to-machine interaction over a network.
It has an interface described in a machine-processable
format (specifically Web Services Description Language
WSDL). Other systems interact with the web service in a
manner prescribed by its description using SOAP messages,
typically conveyed using HTTP with an XML serialization in
conjunction with other web-related standards.

A Web server is a program that, using the client/server
model and the World Wide Web's Hypertext Transfer Protocol (
HTTP ), serves the files that form Web pages to Web users
(whose computers contain HTTP clients that forward their
requests). Every computer on the Internet that contains a
Web site must have a Web server program.