
Web Services and AJAX • 409
•However, Web Services can be the end point of other types of interaction, for example, of a human-
to-computer interaction. As an example, if a person sends her credit card details for making an
online payment, a Web Service could perform the card validation. But the Card validation Web
Service would normally be done by another progamm, and not by a human being.
3. A Web Service runs over a network.
•Web Services run over networks. This means that although strictly not necessary, they are usually
distributed in nature.
9.1.2 How are Web Services Different?
Our discussion brings up another critical question, ...