Which layer of the OSI model handles data encryption?

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The layer of the OSI model that handles data encryption is the Presentation layer. This layer is responsible for the syntax and semantics of the information exchanged between systems. It acts as a translator between the application layer and the data format used by the network. One of its key functions includes data formatting and transformation, which encompasses encryption and decryption processes.

In the context of encryption, the Presentation layer ensures that data is securely formatted and can be transmitted in a secure manner. This means that when information is being sent over the network, it can be encoded (encrypted) to protect its integrity and confidentiality from unauthorized access. When the data reaches the destination, the Presentation layer is also responsible for decoding (decrypting) it so that it can be understood by the receiving application.

By focusing on data encryption at this layer, the Presentation layer abstracts the complexities of the encryption process away from the upper application layers, allowing those applications to function without needing to understand the specifics of data encryption mechanisms.