# TCP/IP Model

This model was developed by ARPA. There are 5 layers in this model:

1. [**Application Layer**](https://saptarshi-sarkar.gitbook.io/notes/computer-networking/how-does-the-internet-work/tcp-ip-model/application-layer)
2. [**Transport Layer**](https://saptarshi-sarkar.gitbook.io/notes/computer-networking/how-does-the-internet-work/tcp-ip-model/transport-layer)
3. [**Network Layer**](https://saptarshi-sarkar.gitbook.io/notes/computer-networking/how-does-the-internet-work/tcp-ip-model/network-layer)
4. [**Data Link Layer**](https://saptarshi-sarkar.gitbook.io/notes/computer-networking/how-does-the-internet-work/tcp-ip-model/data-link-layer)
5. [**Physical Layer**](https://saptarshi-sarkar.gitbook.io/notes/computer-networking/how-does-the-internet-work/tcp-ip-model/physical-layer)