Why does Threat Grid file upload fail with active registration?
A security engineer found a suspicious file from an employee email address and is trying to upload it for analysis, however the upload is failing. The last registration status is still active. What is the cause for this issue?
Community Insight
This item tests whether you can distinguish a Threat Grid connectivity failure from a licensing or host-limit condition; the trap is assuming an active registration status rules out all local submission restrictions.
A suspicious file upload to Cisco Threat Grid fails despite the last registration status being active. The page explains why a configured host limit—not connectivity to Threat Grid—is the correct cause (B) in this Firepower malware-analysis scenario.
Many candidates pick D (Cloud connectivity loss) because an upload failure naturally suggests a network problem, but an active registration status already proves the FMC-to-Threat Grid channel is up.
Community Discussion (9 comments)
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Expert Analysis
Why the Answer Is Correct
The question states the "last registration status is still active," which in Cisco Secure Firewall Management Center (FMC) / Secure Malware Analytics (formerly Threat Grid) integration means the device is successfully registered and communicating with the analysis service. That rules out connectivity failures to either on-premises Threat Grid (option A) or Threat Grid Cloud (option D). The remaining likely cause is a host limit configured in the file policy or malware defense settings; when the maximum number of hosts allowed to submit files for analysis is reached, uploads fail even though the registration remains healthy. As tinyJoe noted, the product name change from Threat Grid to Secure Malware Analytics often confuses candidates, but the operational concept of a host limit is the key.Why the Other Options Are Wrong
Options A and D both describe communication failures with Threat Grid on-prem or cloud, but an active registration status contradicts those scenarios; if the FMC could not reach Threat Grid, the status would typically show as disconnected or expired. Option C mentions user agent status set to monitor, which relates to identity policy or user agent settings, not file upload submission limits. The community comment from gwb points out that host limits are normally configured under network discovery, and that "drop host" affects discovery status rather than malware status; while the exact location may vary, the concept of a host limit (B) is the only option that explains a failed upload while registration is active. Cokamaniako's comment about rate limits also supports that submission restrictions, not connectivity, are the culprit.Community Comment Notes
Several learners lean toward option B, including tinyJoe who wrote "The answer is probably B" and also highlighted the confusing product naming. Initial14 initially chose D but later reversed, saying "Sorry, Id go for host limit here" after considering the active registration status. donciga explicitly stated "The correct answer is B" and linked a Cisco support document about upload limit errors. whysohardwhy and THEODORABLE both note the poor wording and suggest either host limit or rate limit, but the active registration status remains the decisive clue. These comments collectively reinforce that connectivity is not the issue, making the host-limit explanation the most consistent.Exam Strategy
Look for status indicators that rule out connectivity before selecting a network-related answer. In Cisco Secure Firewall questions, an active registration or license status usually means the service channel is healthy, so focus on local limits, licenses, or policy restrictions. If two options describe the same connectivity failure with different locations, they are often distractors.
Frequently Asked Questions
Why is a host limit the cause instead of Threat Grid cloud connectivity?
An active registration status confirms the FMC can reach Threat Grid, so the failure is a local submission restriction such as a host limit, not a network outage (option D).
What does an active last registration status mean in Threat Grid?
It means the FMC device is still successfully registered with the analysis service, ruling out on-prem or cloud connectivity failures (options A and D).