# OSI Model

The **Open Systems Interconnection Model** is a standardized model used to demonstrate the theory behind computer networking. It's based on the encapsulation of the data with every pass by a layer, adding a header to the data, and with a little exception for the Data Link layer, which also adds a trailer. It is composed of 7 layers:

<figure><img src="https://1571945027-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtgxeteB8N7iEoJU7WZh6%2Fuploads%2FF7eEtm459XuKv9pdew4v%2Fimage.png?alt=media&#x26;token=23112c34-ce2a-4468-9778-797f62ffd066" alt=""><figcaption></figcaption></figure>

We can also take a look at how the data could be represented and interpreted in each layer:

<figure><img src="https://1571945027-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtgxeteB8N7iEoJU7WZh6%2Fuploads%2Fh89IlRbVeA4KkMN0ojHC%2Fimage.png?alt=media&#x26;token=5d4a2f30-b8c7-42b1-ba41-7e8651ead76c" alt="" width="563"><figcaption><p><a href="https://rinku.tech/modelo-osi/">https://rinku.tech/modelo-osi/</a></p></figcaption></figure>
