Question 13

Explanation

The correct answer: Applying end-to-end encryption at the application layer: The application layer, being the topmost layer of the OSI model, provides a set of interfaces for applications to obtain access to networked services. Applying end-to-end encryption at this layer ensures that data remains confidential from the point of origin to its destination, safeguarding against eavesdropping and potential data manipulation. The incorrect answers: Ensuring data integrity at the transport layer: While ensuring data integrity at the transport layer is essential, this layer mainly provides reliable data transfer services between two network hosts. Data integrity can be ensured here, but confidentiality might not be fully addressed. Developing a protocol for addressing at the network layer: The network layer is primarily responsible for routing, addressing, and forwarding data packets. Developing an addressing protocol is more about ensuring efficient and reliable data transfer than about heightening security. Defining interfaces at the presentation layer: The presentation layer deals with data translation, encryption, and compression. While defining clear interfaces here is essential for interoperability, it doesn't directly increase security to the same extent as applying end-to-end encryption at the application layer.