Describe the formats and protocols used by AJAX
- The client web page is creates the XmlHttpRequest, and thus the connection from the web page to an application on the server.
- Part of that connection determines how the response can be produced to the client code – via the use of a “callback” routine.
- The callback routine is called multiple times which come with a status code which indicates the reason for the invocation.
- When a request can be successfully completed by the server application, a response should also be produced.
