Describe OSI layer

Question

Describe OSI layer

Accepted Answer

The OSI (Open Systems Interconnection) model is a conceptual framework that standardizes the functions of a communication system into seven layers.

The OSI model is used to understand and describe how different network protocols and technologies interact with each other.
Each layer in the OSI model has a specific function and communicates with the layers above and below it.
The seven layers of the OSI model are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.
The Physical layer deals with the physical transmission of data, such as cables and network interfaces.
The Data Link layer provides error-free transmission of data frames between nodes on a network.
The Network layer handles routing and logical addressing, allowing data to be sent across different networks.
The Transport layer ensures reliable delivery of data between hosts, including error detection and correction.
The Session layer establishes, manages, and terminates connections between applications.
The Presentation layer handles data formatting, encryption, and compression.
The Application layer provides services directly to the end-user applications, such as email or web browsing.
Each layer encapsulates the data received from the layer above it and adds its own header or trailer information.
The OSI model helps in troubleshooting network issues by isolating problems to specific layers.

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