Definition of HTTP

Definition of HTTP, HTTP is an application layer network protocol used for distributed information systems, collaborative, and using hypermedia. many users in the retrieval of resources interconnected by links, called a hypertext document.

HTTP is not limited to use with TCP / IP, although it is one of the HTTP application protocol TCP / IP the most popular over the Internet. It can be implemented on top of HTTP, other protocols over the Internet or over other networks. as mentioned in

"Implemented on top of any other protocol on the Internet, or on other networks.", but the HTTP protocol requires a reliable transport layer.