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OSI-Model

Open Systems Interconnection model

The OSI Model was designed in 1977 and is part of the ISO specifications since 1984.
Each OSI layer serves a unique task for network communication.


Layer 7   Application Layer

Layer 6   Presentation Layer

Layer 5   Session Layer

Layer 4   Transport Layer

Layer 3   Network Layer

Layer 2   Data Link Layer

Layer 1   Physical Layer