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School/Analyse/OSI Model.md
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@ -27,6 +27,18 @@ These services are usually protocols that interact with the data that the user u
For example a web browser like Google Chrome uses the HTTP protocol to browse files on the internet. And the mail client Outlook uses the SMTP protocol to send mail via the internet.
## 6. Presentation Layer
The presentation layer is responsible for preparing the data so that it can be used by the Application Layer.
**Presentation layer is responsible for:**
- Translation of data
- Encryption of data
- Compression of data
For example, two devices can use different types of encoding on their data, the presentation layer will translate the data in a way that the Application Layer can understand.
When sending sensitive data, we would like to encrypt the data so that its secure. The Presentation layer is responsible for encrypting and decrypting ingoing or ou
## 5. Session Layer
## 4. Transport Layer
## 3. Network Layer