The OSI model is a reference model that is used to structure and standardize network communication. OSI stands for “Open System Interconnection”.
It consists of 7 layers: physical layer (1st layer), data link layer (2nd layer), network layer (3rd layer), transport layer (4th layer), session layer (5th layer), presentation layer (6th layer) and application layer (7th layer). Each layer establishes specific tasks for communication between two systems. This facilitates communication between different computers and devices in a network. In addition, each layer has protocols and procedures that are designed to provide services for the upper layer.
The OSI model serves as a common language for developers to ensure the compatibility of products and protocols. It also eliminates errors and creates an understanding of network problems. It therefore serves as a theoretical basis for technologies and network protocols.
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