Network, Networking Technology, Data Communication Terms, Glossary and Dictionary

OSI 7-Layer Reference Model

Open Systems Interconnection (OSI) 7-Layer Reference Model, also known as OSI model or 7 layers model or OSI reference model, is a reference model developed by ISO (International Organization for Standardization) in 1984, as a conceptual framework of standards for communication in the network across different equipment and applications by different vendors. It is now considered the primary architectural model for inter-computing and inter-networking communications. Most of the network communication protocols used today have a structure based on the OSI model. The OSI model defines the communications process into 7 layers, dividing the tasks involved with moving information between networked computers into seven smaller, more manageable task groups. A task or group of tasks is then assigned to each of the 7 OSI layers. Each layer is reasonably self-contained, so that the tasks assigned to each layer can be implemented independently. This enables the solutions offered by one layer to be updated without adversely affecting the other layers.

Related Terms:

OSI 7-Layer Reference Model