What is Restful Web Service || Rest API with HTTP protocol.
Restful Web Services are like API used in the Web based Application. It uses Rest Architectural style and works on HTTP protocol.
It has following rules :-
1. Client Server Communication
2. Statelessness
3. Resource based
4. Layered System
Soap Web Services are different type of Web Services works on http or smtp protocol. All Web Services are API but not all API are Web Services.