3. Protocol Layers
The OSI (Open Systems Interconnection) Data Model
-ISO standard for computer networks design and functioning.
-Involves at least 7 layers, each playing a specific role when applications are communicating over the net.
-During the sending process, each layer (from top to down) will add a specific header to the raw data.
-At the reception, headers are eliminated conversely until the data arrived to the receiving application.
