Discussion
Encryption and Decryption is the responsibility of _______ Layer.
Answer: C
Among the layers listed, encryption and decryption are assigned to the Application layer. In the OSI model this job strictly belongs to the Presentation layer, which is not offered here, so the listed layer that sits at the top and handles data representation and security for the user's data is the Application layer.
The Physical layer only moves raw bits over the medium. The Network layer routes packets between networks and the Datalink layer frames bits and detects errors between adjacent nodes. None of these three is responsible for encrypting user data.
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