REST is equal to REpresentational State Transfer.
REST as a web standard is created in year 2000.
REST web services uses HTTP protocol for data communication between source and destination.
In a REST web service. Every database table on the server is a resource. A client can access the resource on the server using standard HTTP Methods.
HTTP GET used to READ
HTTP PUT used to UPDATE
HTTP POST used to CREATE
HTTP DELETE used to DELETE
HTTP OPTIONS to get supported methods
In REST architecture each resource is represented by a unique URI.
REST uses various representations like XML,TEXT and JSON. JSON is the most widely used format for representing a resource.
Web Services built with above architecture are called RESTful Web Services.