7 Entity  
 
 
Request and Response messages MAY transfer an entity if not otherwise restricted by the request method or response status code. An entity consists of entity-header fields and an entity-body, although some responses will only include the entity-headers.  
 
In this section, both sender and recipient refer to either the client or the server, depending on who sends and who receives the entity.  
1.      Entity Header Fields ... 7.1  
2.      Entity Body ... 7.2  
1.   Type ... 7.2.1  
2.   Entity Length ... 7.2.2