what is the OSI model and describe about the each and every layer of that layer function and functionality?

Question

Accepted Answer

The OSI model is a conceptual framework that standardizes the functions of a communication system into seven layers.

Layer 1 (Physical): Deals with the physical transmission of data over the network.
Layer 2 (Data Link): Provides error-free transmission of data frames between nodes on the same network.
Layer 3 (Network): Handles routing and logical addressing to enable data transfer between different networks.
Layer 4 (Transport): Ensures reliable delivery of data by segmenting and reassembling packets.
Layer 5 (Session): Establishes, manages, and terminates connections between applications.
Layer 6 (Presentation): Translates, encrypts, and compresses data for proper interpretation by the application layer.
Layer 7 (Application): Interacts directly with the end-user and supports network services like email, file transfer, etc.

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