Application layer
| OSI Model |
| Application layer |
| Presentation layer |
| Session layer |
| Transport layer |
| Network layer |
| Data link layer |
| Physical layer |
The application layer is the seventh level of the seven layer OSI model. It interfaces directly to and performs common application services for the application processes; it also issues requests to the presentation layer.
The common application layer services provide semantic conversion between associated application processes. Note: Examples of common application services of general interest include the virtual file, virtual terminal, and job transfer and manipulation protocols.