Which layer translates data from the application layer into the format required to transmit the data and handles encryption if used?

Which layer translates data from the application layer into the format required to transmit the data and handles encryption if used?

• A. Layer 6 Presentation
• B. Layer 3 Network
• C. Layer 4 Transport
• D. Layer 2 Data Link

Answer: (A)

Translation of data from the application into a network-ready format and handling encryption when used are duties of the Presentation layer. It sits between the Application layer, which produces the data, and the Transport layer, which moves it across the network. The Presentation layer takes the raw data from the application and converts it into a standard representation—handling things like character encoding, data formatting, and endianness—and can apply compression or encryption so the receiving system can understand and securely process it. Other layers focus on different tasks: routing and addressing, reliable end-to-end delivery, framing, and channel access, but they don’t perform this data formatting and encryption step.

Translation of data from the application into a network-ready format and handling encryption when used are duties of the Presentation layer. It sits between the Application layer, which produces the data, and the Transport layer, which moves it across the network. The Presentation layer takes the raw data from the application and converts it into a standard representation—handling things like character encoding, data formatting, and endianness—and can apply compression or encryption so the receiving system can understand and securely process it. Other layers focus on different tasks: routing and addressing, reliable end-to-end delivery, framing, and channel access, but they don’t perform this data formatting and encryption step.