Seven layers categorize what happens in network communications. The layers are: 7. Application layer 6. Presentation layer 5. Session layer 4. Transport layer 3. Network layer 2. Data link layer 1.

The layers, and what they represent, are as follows: Layer 7: Application. The Application Layer in the OSI model is the layer that is the “closest to the end user”.

The Open Systems Interconnection model (OSI model) is a conceptual model developed by the International Organization for Standardization (ISO) as ISO/IEC 7498-1:1994. It “provides a common basis for ...