Which OSI layer is commonly associated with data encryption and formatting?

• A. Application Layer
• B. Presentation Layer
• C. Data Link Layer
• D. Network Layer

Answer: (B)

The concept being tested is how data is prepared for the receiving application, including how it is formatted and encrypted before being sent over the network. In the OSI model, that responsibility belongs to the layer that handles data representation, encoding, compression, and encryption/decryption, so the receiving end can interpret the data correctly. This is why the correct layer is the one that sits between the application services and the lower layers, handling how data is presented to the application. The Application layer provides user-facing services, the Data Link layer manages frame transmission and local access, and the Network layer handles routing and addressing. Encryption and formatting are most closely associated with the Presentation layer.