ISC2 Exam ISSAP Topic 2 Question 38 Discussion

The application layer functions include identifying communication partners, determining resource availability, and synchronizing communication.

When identifying communication partners, the application layer determines the identity and availability of communication partners for an

application with data to transmit.

The non-repudiation service provides proof of the integrity and origin of data. It is also an authentication that with high assurance can be

asserted to be genuine.

Answer option C is incorrect. The presentation layer provides a variety of coding and conversion functions applied to the application layer

data.

Answer option B is incorrect. The data-link layer provides reliable transit of data across a physical network link.

Answer option D is incorrect. The physical layer defines the electrical, mechanical, procedural, and functional specifications for activating,

maintaining, and deactivating the physical link between communicating network systems.