| The
ISO-OSI Model |
| System A |
| System B |
| 7. Application |
| 7. Application |
| 6. Presentation |
| 6. Presentation |
| 5. Session |
| 5. Session |
| 4. Transport |
| 4. Transport |
| …. |
| 3. Network |
| 3. Network |
| …. |
| 2. Data Link |
| 2. Data Link |
| …. |
| 1. Physical |
| 1. Physical |
| LAN Network |
