Which layer is described as encrypting a command as it is sent and decrypting when received by the server?

Which layer is described as encrypting a command as it is sent and decrypting when received by the server?

• A. Layer 5 Session
• B. Layer 6 Presentation
• C. Layer 4 Transport
• D. Layer 3 Network

Answer: (A)

Encryption and decryption of data as it moves between endpoints is a function of the Presentation layer. This layer handles how data is represented and transformed for the applications, including encoding, compression, and, importantly, encryption and decryption. When you send a command, the Presentation layer can encrypt it so only the intended server can decrypt and interpret it; the server then decrypts to recover the original command for processing. The Session layer manages dialog control and session maintenance, not data encryption. The Transport layer ensures reliable delivery and segmentation, while the Network layer handles routing. So the described behavior best fits the Presentation layer.

Encryption and decryption of data as it moves between endpoints is a function of the Presentation layer. This layer handles how data is represented and transformed for the applications, including encoding, compression, and, importantly, encryption and decryption. When you send a command, the Presentation layer can encrypt it so only the intended server can decrypt and interpret it; the server then decrypts to recover the original command for processing. The Session layer manages dialog control and session maintenance, not data encryption. The Transport layer ensures reliable delivery and segmentation, while the Network layer handles routing. So the described behavior best fits the Presentation layer.