Which Device Can Identify Users After an Action Occurs?
Which of the following can be used to identify users after an action has occurred?
Community Votes
100% of anonymous learners picked answer B. Votes are pick records left by other test-takers — they are not the verified answer.
Community Insight
The test checks understanding of physical security controls in a forensic context, and the common trap is choosing motion detectors because they react after movement, not because they identify anyone.
Cameras are the correct answer because they provide visual records that allow for post-event identification of individuals. This CompTIA Network+ question focuses on physical security controls and is supported by strong community consensus.
A common wrong answer is motion detectors, since they activate after motion occurs, but they only sense movement and cannot identify who performed the action.
Community Discussion (4 comments)
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Expert Analysis
Why the Answer Is Correct
Cameras are the correct choice because they capture a visual record of events, allowing security personnel to review footage after an action and identify the individual involved. This aligns with post-incident forensics and accountability requirements. Community comments reinforce this: one user states cameras "provide visual records of activities, allowing for post-event analysis and identification of individuals." Another commenter succinctly notes, "Cameras will provide a visual identification of the individual who performed the action."Why the Other Options Are Wrong
Access control vestibules are physical entry controls designed to prevent tailgating and manage access, not to identify users after an action. Asset tags are used for tracking physical assets, and while they may be associated with users, they do not identify users directly after an action. Motion detectors only sense the presence of motion; they cannot determine the identity of the person who triggered them. The overwhelmingly preferred answer in voting is cameras, with 86 votes and no competing option receiving significant support.Community Comment Notes
The most useful comments directly and correctly support cameras, emphasizing visual identification and post-event analysis. One commenter wonders about motion detectors, but this is a misconception because detecting motion is not the same as identifying an individual. Another commenter argues for asset tags, but asset tags identify assets, not users, and this interpretation stretches the scenario beyond the intent of the question. The community consensus is clear and aligns with standard physical security practices.Official Reference
Exam Strategy
When answering physical security questions on the Network+ exam, focus on the specific capability described in the scenario. If the question requires identifying a person after an event, look for the control that provides a documented record—usually cameras—rather than controls that only detect, prevent, or track objects.