The Open Systems Interconnection Specification (OSI)- refers to the use of the specifications laid out in the OSI reference model. The specifications include how the seven different protocol layers (often referred to as a protocol stack) communication both intra- layer and inter- layer. The OSI evolved as an international standard as there existed a need to standardise how hardware and software communicate depaite possible differences in architecture used. It is a joint effort between two international standard bodies: the International Organization for Standardization (ISO) and the International Telecommunication Union-Telecommunications Standards Sector (ITU-T).
Each OSI--Protocol Specification operates at a single layer. Each defines the primitive operations and permissible responses required to exchange information between peer processes in communicating systems to carry out all or a subset of the services defined within the OSI--Service Definitions for that layer. There are seven layers in the OSI protocol stack.
Famous quotes containing the words open and/or systems:
“And now that the end is near
The segments of the trip swing open like an orange.”
—John Ashbery (b. 1927)
“We have done scant justice to the reasonableness of cannibalism. There are in fact so many and such excellent motives possible to it that mankind has never been able to fit all of them into one universal scheme, and has accordingly contrived various diverse and contradictory systems the better to display its virtues.”
—Ruth Benedict (1887–1948)