Comprehensive and Detailed Explanation From Exact Extract of Network Security Support Engineer Study Guide (FortiOS 7.6) topics:
The correct answers are A and B . Security Fabric communication uses Fortinet-proprietary protocols, mainly FortiTelemetry and Neighbor Discovery . The study guide states that FortiTelemetry uses TCP port 8013
, and that the connection is always established by the downstream FortiGate toward the upstream FortiGate
. This validates option A . The same section also states that FortiTelemetry must be manually enabled .
More precisely, the upstream FortiGate interface must have Security Fabric Connection enabled under administrative access so it can accept incoming Security Fabric connection requests. This validates option B .
Option C is wrong because only the FortiTelemetry TCP port 8013 can be changed; Neighbor Discovery uses UDP port 8014 and cannot be changed. Option D is also wrong because Security Fabric communication is not enabled automatically among all Fortinet devices. It requires the correct Security Fabric settings, interface administrative access, and downstream authorization. The study guide's troubleshooting section confirms that when FortiTelemetry is disabled, the upstream FortiGate receives TCP 8013 SYN packets but does not complete the Security Fabric connection.

According to the official Fortinet documentation (Technical Tip: Useful FSSO Commands), heartbeat messages play a crucial role in communication between the FSSO Collector Agent and FortiGate. These messages are regularly sent from the Collector Agent to verify its status, maintain session awareness, and confirm connectivity between the authentication infrastructure and FortiGate appliances.
Option B is confirmed by Fortinet, as the collector agent logs on Windows or its management console will specifically note heartbeat events, connection status, and any issues maintaining contact with FortiGate units.
Option C is validated by both official CLI documentation and the technical tip linked. On FortiGate, heartbeat messages from the collector agent are visible using real-time debug tools such as diagnose debug application authd or FSSO-specific commands. These enable administrators to monitor live logon states, session status, and connection health directly from the FortiGate CLI. The debug stream shows heartbeats received and their effect on active logons, associating health monitoring with active sessions.
Heartbeat operation is fully automated once FSSO is set up-there is no requirement for manual enablement or configuration, aligning with Fortinet's philosophy of seamless integration and centralized management across the Security Fabric. This ensures that both FortiGate and the collector agent can quickly and reliably detect any miscommunication or outage, addressing authentication issues proactively.
References:
Technical Tip: Useful FSSO Commands (Fortinet Community)
FortiOS Administration Guide: FSSO, Collector Agent, Heartbeat, CLI Debug