Fortinet NSE5_FNC_AD_7.6 Exam Dumps - Actual Questions Answers

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.

The correct answer is D . In a Layer 3 registration or isolation network design, DHCP requests from the isolated registration VLAN are not served locally on that VLAN by a normal production DHCP server. Instead, the registration VLAN’s DHCP relay must forward DHCP traffic to FortiNAC-F port2 , because port2 is the captive network service interface. The study guide states that in Layer 3 captive networks, DHCP traffic is relayed to port2 from the captive networks, and that the FortiNAC-F port2 interface provides DHCP, DNS, and captive portal services for hosts assigned to those captive networks.

In the exhibit, the registration VLAN is 192.168.10.x/24 , with gateway 192.168.10.254 . That gateway is where the DHCP relay would be configured, but it is not the relay destination. The relay destination must be the FortiNAC-F port2 address, shown as 192.168.200.10 . The corporate DHCP server 192.168.100.75 is for production network addressing, not registration isolation. The FortiNAC-F port1 address 192.168.100.20 is the administrative or production-facing interface, not the captive network service interface. Therefore, the DHCP relay should point to 192.168.200.10 .

The process of moving a host from aRegistration VLANto aProduction VLAN(Access VLAN) is a fundamental part of the FortiNAC-F " VLAN steering " workflow. When a host successfully registers via the captive portal, FortiNAC-F evaluates its Network Access Policies to determine the correct VLAN. If the host remains stuck in the Registration VLAN despite a successful registration, it is typically due to port-level restrictions or the presence of other unregistered devices.

The two most common reasons for this behavior as per the documentation are:

The port default VLAN is the same as the Registration VLAN:If the " Default VLAN " field in the switch port ' s model configuration is set to the same ID as the Registration VLAN, the port will not change state because FortiNAC-F believes it is already in its " normal " or " forced " state.

There is another unregistered host on the same port:FortiNAC-F maintains the security posture of the physical port. If multiple hosts are connected to a single port (e.g., via a hub or unmanaged switch) and at least one host remains " Rogue " (unregistered), FortiNAC-F will generally keep the entire port in the isolation/registration VLAN to prevent the unregistered host from gaining unauthorized access to the production network.

Issues with agents (A, B) typically prevent a host from completing compliance or registration but do not usually result in a " stuck " statusafterregistration has already been marked as successful in the system.

" If a port is identified as havingMultiple Hosts, and those hosts require different levels of access, FortiNAC remains in the most restrictive state (Registration or Isolation) until all hosts on that port are authorized... Additionally, verify theDefault VLANsetting for the port; if the Default VLAN and Registration VLAN match, the system will not trigger a VLAN change upon registration. " —FortiNAC-F Administration Guide: Troubleshooting Host Management.