Presentation session transport network data link physical the seven layers of the osi model cont. The osi reference model is the highest level of abstraction in the osi scheme. It divides the communications processes into seven layers. Ppt osi model powerpoint presentation free to download. Even though the osi model is conceptual, an appreciation of its purpose.
Here are the basic functionalities of the presentation layer. The osi reference model was also recognized by ccitt rapporteurs group on layered model for public data network services. The osi model consists of seven layers, each corresponding to a specific network function. A free powerpoint ppt presentation displayed as a flash slide show on id.
An example of a presentation service would be the conversion of an ebcdiccoded text computer file to an asciicoded file. The presentation layer is responsible for translation. Presentation layer protocols free download as powerpoint presentation. The presentation layer is an important layer in the osi model because it is responsible for some of the important services like data conversion, data compression, encryption, and decryption. Data is encapsulated with the necessary protocol information as it moves down the layers before network transit. It was designed for data encryption, decryption and compression. The presentation layer is responsible for the delivery and formatting of information to the. The open systems interconnection osi model is a reference tool for understanding data communications between any two networked systems. Osi reference model the open systems interconnection osi model was developed by the international organization for standardization iso, and formalized in 1984. In the sevenlayer osi model of computer networking, the presentation layer is layer 6 and serves as the data translator for the network.
Pdf on oct 27, 2018, abbas miry and others published osi model find. The upper four layers of the osi model application, presentation and sessionlayers 7, 6 and 5 are orientated more toward services to the applications. Each osi layer serves a unique task for network communication. The osi model was designed in 1977 and is part of the iso specifications since 1984. Pdf the early successes of computer networks in the mid1970s made it apparent that to utilize the full potential of computer. Osi model open systems interconnection osi is a set of internationally recognized, nonproprietary standards for networking and for operating system involved in. To briefly discuss the functions of each layer in the osi model. Application layer this layer combines functionalities of the three top layers of the osi model and may also be called the processapplication layer. Osi model is based on the proposal developed by the. The open systems interconnection osi model is a reference tool for understanding data. The presentation layer is the lowest layer at which application programmers consider data structure and presentation, instead of simply sending data in the form of datagrams or packets between hosts. The presentation layer can translate data into different formats. Presentation layer protocols osi model communications.
Presentation layer presentation layer is the sixth layer of osi model. This layer translates applications into data so it. It provided the first framework governing how information should be sent across a network. To address the problem of networks increasing in size and in. The presentation layer is also called as the layer 6 of the osi model. Handles transportation issues between hosts ensures data transport reliability establishes, maintains and terminates virtual circuits provides reliability through fault detection and recovery. The upper four layers of the osi model application, presentation.
Osi model layer 6 presentation this lesson focuses on layer 6 of the osi model, which is the presentation layer. Each layer both performs specific functions to support the layers above it and offers services to the layers below it. The purpose of osi model is for open communication between different. The function of each layer should be chosen according to the. Network layers follow a set of rules, called protocol. Examples of presentation layer functionality include. Also, some of the most popular applications email, file transport, and so on interface with this layer to communicate with other applications on the network.