Comprehensive and Detailed Explanation From Exact Extract of FortiNAC-F 7.6 Administrator Guide or Knowledge:
Exact Extract:
The FortiNAC-F study guide states that MAC notification traps are preferred because FortiNAC-F does not need to connect back to the infrastructure device every time a link-up or link-down trap is received. The required MAC and port information is already included in the MAC notification trap, which makes database updates faster and uses fewer resources. It also states that hosts and devices connected through hubs or IP phones are seen immediately, even when the downstream device cannot generate link-up or link-down traps.
Technical Deep Dive:
The correct answers are B and C . With link-up/link-down traps, the trap only tells FortiNAC-F that an interface changed state. FortiNAC-F then has to perform an L2 poll against the switch forwarding table to discover which MAC address appeared or disappeared. That means extra SNMP/CLI activity, more delay, and more processing on both FortiNAC-F and the switch. The guide confirms that link traps trigger FortiNAC-F to perform a Layer 2 poll, while MAC notification traps directly contain the learned or removed MAC address and associated port.
Option A is wrong because MAC notification traps are Layer 2 visibility events. They identify MAC address and port , not IP address. IP-to-MAC correlation comes from Layer 3 polling or DHCP fingerprinting, not MAC notification traps. Option D is badly worded and should not be selected: MAC notification traps do provide faster updates, but the processing overhead is reduced, not slightly increased.
Operationally, on supported switches you enable SNMP traps for MAC address-table changes and point the trap destination to FortiNAC-F. On Cisco-style infrastructure, this is usually done with commands such as snmp-server host < FortiNAC-IP > version 2c < community > plus MAC notification trap configuration. Do not enable MAC notification traps on uplinks, because uplinks learn many downstream MAC addresses and would create misleading endpoint-location data.
