TCP model

• Layer 4: Application (highest)
• Layer 3: Transport
• Layer 2: Internet
• Layer 1: Network interface (lowest)

OSI vs. TCP models

Comparison of the TCP and OSI models

Roughly, the TCP Model encapsulates the OSI Model.

+--------------+-------------------+
| OSI LAYER    | TCP/IP LAYER      |
+--------------+-------------------+
| Application  |                   |
+--------------+                   |
| Presentation | Application       |
+--------------+                   |
| Session      |                   |
+--------------+-------------------+
| Transport    | Transport         |
+--------------+-------------------+
| Network      | Internet          |
+--------------+-------------------+
| Data Link    |                   |
+--------------+ Network Interface |
| Physical     |                   |
+--------------+-------------------+

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