THE OSI MODEL EXPLAINED
, WHAT IS THE OSI MODEL?
The Open System Interconnection model (OSI) is a 7 layer model used to
visualize computer networks. The OSI model is an extremely useful tool
for development and problem solving. Layer 1 - the application layer, is
closest to the person while layer 7 - the Physical layer is where the
network receives and transmits raw data. The OSI model belongs to the
International Organization for Standards (ISO) and is maintained by the
identification ISO/IEC 7498–1. I will explain each of the 7 layers of the OSI
model in simple terms. The layers will be explained from layer 7 to layer
1, as this is where the data flow starts.
The Open System Interconnection (OSI Model) also defines a logical
network and effectively describes computer packet transfer by using
various layers of protocols. Each layer relies on the next lower layer to
perform primitive functions. All these seven layers work collaboratively to
transmit the data from one layer to another. Changes made in one layer
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