Cada protocolo implementa uma funcionalidade assinalada a uma determinada camada. A layer should be created where different level of abstraction is needed. Introducao ha uns bons anos atras, cada fabricante tinha as suas tecnologias, topologias, protocolos e entao havia problemas na interoperabilidade entre equipamentos. The open systems interconnection osi model is a reference tool for understanding data communications between any two networked systems. It was published in 1984 by both the iso, as standard iso 7498, and the renamed ccitt now called the telecommunications standardization sector of the international telecommunication union or itut as standard x. It is now considered the primary architectural model for intercomputer communications. The osi model consists of seven layers, each corresponding to a specific network function.
Osi model 7 layers explained pdf layers functionsthe open systems interconnection model osi model is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system without regard to their underlying internal structure and technology. Osi reference model the open systems interconnection osi model was developed by the international organization for standardization iso, and formalized in 1984. So as i look at transitioning to the communication platforms of the future, i see that the. Modelo osi recomendadas como presentar y enganchar a tu publico espanhol. Each layer both performs specific functions to support the layers above it and offers services to the layers below it. The standard is usually referred to as open systems interconnection reference model, osi reference model, or simply osi model. Modelos osi y tcpip caracteristicas, funciones, diferencias. It divides the communications processes into seven layers. It provided the first framework governing how information should be sent across a network. The osi reference model the model was developed by the international organisation for standardisation iso in 1984. The open systems interconnection osi reference model is a descriptive network scheme. Rfc 1195 use of osi isis for routing in tcpip and dual. Redes empresarialesenterprise una corporacion, una agencia, una. The number of layers should be large enough that distinct functions should not be put in the same layer and small.