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School/Analyse/OSI Model.md
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@ -38,10 +38,13 @@ For example, two devices can use different types of encoding on their data, the
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 outgoing data.
Also when sending of receiving data we sometimes want to compress the data so that
Also when sending of receiving data we sometimes want to compress the data so that sending and receiving data is more efficient. (smaller size)
## 5. Session Layer
The session layer is responsible for opening and closing connections between two devices. The duration of a connection is called the session.
The session layer ensures that the connections remains active and open so that the data being received and/or send is complete. For example whe
## 4. Transport Layer
## 3. Network Layer
## 2. Data Link Layer