Modelo osi pdf files

Open systems interconnection reference model osi model or osi seven layer model is a conceptual model that characterizes and standardizes the internal functions of a communication system by partitioning it into abstraction layers. A layer should be created where different level of abstraction is needed. This article lists protocols, categorized by the nearest layer in the open systems. Os quatro niveis superiores do modelo osi sao responsaveis pelos problemas associados a comunicacao pontoaponto entre os dois extremos comunicantes. See more ideas about osi model, cisco networking and computer network. See more ideas about osi model, computer network and computer technology. Osi model concepts service says what a layer does interface says how to access the service protocol says how is the service implemented a set of rules and formats that govern the. Open systems interconnection reference model osi model or osi seven layer model is a conceptual model that characterizes and standardizes the internal functions of a communication. The open systems interconnection osi model is a reference tool for understanding data communications between any two networked systems. Cada protocolo implementa uma funcionalidade assinalada a uma determinada camada. Each layer both performs specific functions to support the layers above it and offers services to the layers below it. It divides the communications processes into seven layers. Lets go ahead and have a look at the osi model layers.

Questions on routing protocol in computer networks set3. The layers begin at the end user process application, layer 7 and work. The session layer of the open system interconnection osi model defines how the data is formatted between the devices on either side of the link. This is effectively the manner in which they maintain an. This is effectively the manner in which they maintain an open channel between the two devices.

Aspectos fisicos e eletricos da conexao entre computador e rede. The layers begin at the end user process application, layer 7 and work their way down through each layer until bits are put on the wire physical, layer 1. Learn more to embed this file in your language if available use the lang parameter with the appropriate. Learn more to embed this file in your language if available use the lang parameter with the appropriate language code, e. Protocol encapsulation chart a pdf file illustrating the relationship between common protocols and the osi reference model.

The most important concept is a discussion of the osi model and how data flows across a network. Modelo osi capa 1 cableado estructurado clase n 4 version. So it provides services to different user applications. Application presentation session transport network data. Pdf modelo osi y niveles enlace datos y red comunicacion.