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explain the network architecture of osi referance model...please explain that to me

dear friend,

-->>The open systems interconnection (OSI) model is a product of the open systems interconnection effort at the international organization for standardisation.
-->>It is a characterising and standardising the functions og communications system in terms of abstraction layers.
-->>The following figure shows the network architecture of OSI reference model.


All the best.................

explain the network architecture of OSI reference model??