# User Models to Understand IP Networking

## Network Models

|| OSI | TCP/IP | Actual |
|7|Application|Application|Application|
|6|Presentation|Application|Application|
|5|Session|Application|Application|
|4|Transport|Transport|Transport|
|3|Network|Network|Network|
|2|Data Link|Network Access|Data Link|
|1|Physical|Network Access|Physical|