Free Fortinet FCSS_LED_AR-7.6 Exam Dumps April 2026

WithAD machine authenticationvia FortiAuthenticator:

When a machine successfully authenticates, FortiAuthenticator records:

Machine account / identity

MAC addressof the device

Associated IP and session info

To handle sleep/hibernation:

FortiAuthenticator keeps acache of authenticated MAC addressesfor a configured timeout.

When the device wakes up and sends traffic again, FortiAuthenticator/FSSO can still treat it as authenticated as long as its MAC is in cache, so access is maintained without forcing a full machine re-auth immediately.

This matches optionD.

A(guest VLAN) is not the standard behavior here.

B(WoL) is unrelated.

C(IP-based) would break as IPs can change; MAC-based caching is what's used.

The SSL-VPN configuration hasRequire Client Certificateenabled. When this is enabled, FortiOS performs two checks:

Normal user authentication(username/password or PKI user)

Additional client certificate check-- the client certificatemust be signed by a CA that FortiGate trusts

FortiOS documentation for ''SSL VPN with certificate authentication'' states:

''The client certificate only needs to be signed by a known CA in order to pass authentication.''

''The CA certificate is the certificate that signed both the server certificate and the user certificate... The CA certificate is available to be imported on the FortiGate.''

The debug output shows key lines:

__quick_check_peer-CA does not match.

Issuer of cert depth 0 is not detected in CMDB.

This tells us:

FortiGatedoes see the user's certificate,

Butcannot find the issuing CAin its local CA certificate store (''CMDB'' = configuration database).

This means theCA that signed the user certificate has not been importedinto FortiGate.

Now evaluate the options:

A . Enable Redirect HTTP to SSL-VPN-- affects only redirection from HTTP to HTTPS; it has nothing to do with certificate validation.

B . Import the CA that signed the SSL VPN Server Certificate-- the server certificate is already working (the portal comes up) and its CA is not what the debug complains about; the error is about thepeer (user) certificate. Often the same CA signs both, but the failing check specifically says the issuer of the client cert is not in CMDB.

C . Set the user certificate as the Server Certificate-- incorrect; server and client certificates serve different roles.

D . Import the CA that signed the user certificate to FortiGate-- this directly addresses the debug error and aligns with the documented requirement that the CA which issued the user certificate must be known to FortiGate.

FortiLink device detection relies on FortiGate'sDevice IdentificationandIoT Detectioncapabilities to classify devices connected to FortiSwitch ports.

To enabledevice identificationandvulnerability detectionfor IoT/endpoint devices in LAN Edge deployments, FortiGate must subscribe to the correct FortiGuard services.

1. Required FortiGuard License for Device Identification (IoT Detection)

The FortiOS documentation clearly states:

''IoT detection service... requires anAttack Surface Security Rating service licenseto download the IoT signature package.''

Additionally:

''The following settings are required for IoT device detection:

A validAttack Surface Security Rating service licenseto download the IoT signature package.''

This service provides:

IoT signature package

IoT device classification

Device behavior profiling

This makesAttack Surface Securitymandatory for FortiLink device detection.

2. Required FortiGuard License for Device Vulnerability Detection

FortiOS further clarifies that IoT vulnerabilities require theIoT Detection license, which is included under the same Attack Surface service entitlement:

''To detect IoT vulnerabilities the FortiGate must have a validIoT Definitions license...''

The IoT Definitions license comeswith the Attack Surface Security Rating serviceand is used for:

Scanning connected devices

Identifying IoT/endpoint vulnerabilities

Reporting vulnerability severity

Enabling NAC-based remediation (VLAN steering, port isolation)

In LAN Edge Architect, this license combination is emphasized as a foundational requirement for:

FortiSwitch NAC

FortiLink device profiling

Automated quarantine actions

IoT device classification

Vulnerability-based segmentation

3. Why the Correct Answer Is Option D

OptionDlists:

FortiGuard Attack Surface Security

FortiGuard IoT Detection

These are exactly the services required per FortiOS 7.4.1:

Attack Surface Security Rating provides IoT signature package + vulnerability data

IoT Detection (Definitions) enables actual device-type and vulnerability identification

Together they powerFortiLink Device DetectionandIoT Vulnerability Detection, which are essential LAN Edge security functions.

4. Why Other Options Are Incorrect

A . Vulnerability Management + Endpoint Protection

Not used for FortiLink device detection; Endpoint detection relies on IoT service, not FortiClient.

B . Threat Intelligence + IoT Detection

Threat Intelligence (ThreatIntel DB) is used for FAZ IOC, not LAN Edge device detection.

C . Threat Intelligence + Endpoint Protection

Same issue---does not provide IoT device classification or vulnerability scanning.

LAN Edge 7.6 Architect Context Summary

In LAN Edge designs:

FortiGate acts as the controller for FortiSwitch via FortiLink.

Device detection is done at the FortiGate level using NAC/IoT signature capabilities.

Vulnerability detection enables dynamic segmentation decisions (e.g., move device to quarantine VLAN).

To support this, two licenses aremandatory:

Attack Surface Security(includes Security Rating + IoT Detection DB)

IoT Detection(part of the same entitlement, but explicitly required for vulnerability detection)

Thus the verified answer aligns perfectly with LAN Edge operational requirements and Fortinet documentation.