An OSI(Open Systems Interconnection) is a reference model developed by ISO(International Organization for Standardization).
It defines how the system transfers the data via a physical medium to communicate with another system.
OSI Model divided into seven segments or seven-layer where each Layer is responsible for performing particular tasks and transferring the completed tasks to the next Layer for further processing.
Seven layers of the OSI Model are :
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
