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1. Representational state transfer

   • Architectural style for designing network locations
   • Relies on a stateless, client server, protocol, almost always HTTP
     • HTTP methods
       • GET: retrieve data from a specified resource
       • POST: submit data to be processed to a specified resource
       • PUT: update a specified resource
       • DELETE: deletes a specified resource

2. Application Programming Interface

   • APIs are everywhere, contract provided by one piece of software to another, structured request and response
   • Request
     • Order data in certain format
   • Response
     • Deliver data in required format

3. What is a RESTapi?