Correct Answer: B
The OSI (Open Systems Interconnection) model consists of seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application. This framework is used in Fortinet documentation to explain protocol operations. Options A, C, and D are incorrect as they do not match the standard OSI model.
Exact extract: "The OSI model defines seven layers for network communication: 1. Physical, 2. Data Link, 3.
Network, 4. Transport, 5. Session, 6. Presentation, 7. Application."
