REST or Representational State Transfer

REST - Is it a Architecture design pattern or Communication protocol

REST is an Architecture design pattern that follow a set of rules to create Web Services, mostly in the context of HTTP protocol communication. 

REST METHOD	USE
GET	READ
POST	CREATE
PUT	UPDATE
DELETE	DELETE
HEAD	RESPONSE STATUS (METHOD LEVEL)
OPTIONS	REQUEST INFORMATION (METHOD LEVEL)
TRACE	ECHO ORIGINAL REQUEST GOING TO CLIENT
PATCH	PARTIAL UPDATE
PROPFIND	RETRIEVES PROPERTIES DEFINED FOR RESOURCE
LOCK	LOCK RESOURCE
UNLOCK	UNLOCK RESOURCE

REST Data Types - 

STRING 

NUMBER

BOOLEAN

NULL

OBJECT

ARRAY