A network admin notices that files submitted to FortiSandbox are not being analyzed. The FortiGate is configured to send files to FortiSandbox. What is the MOST likely cause?
An expired license prevents analysis. The file submission queue will accumulate.
Why this answer
The most likely cause is an expired FortiSandbox license. When the license expires, FortiSandbox stops analyzing submitted files and may reject new submissions, even though the FortiGate is configured to send them. The FortiGate will still attempt to forward files, but FortiSandbox will not process them, resulting in no analysis results being returned.
Exam trap
The trap here is that candidates assume connectivity or configuration issues (like firewall rules or file size limits) are the cause, but FortiSandbox will still accept submissions with an expired license and simply not analyze them, making the license status the most likely root cause.
How to eliminate wrong answers
Option B is wrong because FortiGate uses port 514 (syslog) or a dedicated API port (typically 443 for HTTPS) to communicate with FortiSandbox, but a firewall policy blocking port 443 would prevent the initial connection, not cause files to be submitted but not analyzed. Option C is wrong because quarantine mode on FortiSandbox isolates detected threats but does not prevent file analysis; files are still analyzed before being quarantined. Option D is wrong because if the file size exceeds the maximum submission size limit on FortiGate, the file would not be sent to FortiSandbox at all, whereas the issue is that files are submitted but not analyzed.