220-1102 Question 330
Single answerPalm print scannerA medical clinic is replacing shared passwords on a nurses' station PC with biometric sign-in to improve accountability and reduce unauthorized access. The clinic chooses a palm print scanner because some staff have difficulty using fingerprint readers while wearing thin protective gloves. After the device is installed, users can enroll successfully, but many logon attempts fail during busy shifts. The failures happen most often when staff quickly wave their hand over the reader without stopping. Which action should the technician recommend FIRST to improve authentication success without reducing security?
- A
Train users to place or hold their hand at the correct distance and orientation over the palm print scanner during authentication
- B
Lower the biometric matching threshold so the scanner accepts partial palm images more easily
- C
Disable biometric sign-in and switch to a shared local administrator account for faster access
- D
Replace the palm print scanner with a smart card reader because palm print scanners cannot be used reliably in healthcare environments
Show answer and explanation
Correct answer: A
Explanation
This question tests practical troubleshooting of a biometric authentication device in an A+ Core 2 context. Palm print scanners are biometric devices that require consistent presentation of the hand to capture a reliable image. When users can enroll successfully but fail during normal use, the first troubleshooting step is often to verify user technique, positioning, and environmental factors rather than immediately changing security thresholds or replacing the solution. Best practices for authentication systems emphasize maintaining security settings, following least privilege, and preserving accountability. In operational environments such as healthcare, technicians should first confirm proper use, review vendor guidance for hand placement and capture requirements, and only then consider calibration, policy changes, or hardware replacement if the problem persists.
- A. Correct.
Correct. Palm print scanners depend on capturing a consistent image of the palm, including proper positioning, distance, and orientation relative to the sensor. If users move too quickly or do not align their hand properly, the scanner may not capture a usable sample even though enrollment succeeded. In a real support scenario, user training and verifying proper use are appropriate first steps before changing security settings or replacing hardware.
- B. Incorrect.
Incorrect. Lowering the matching threshold would reduce security by increasing the chance of false acceptance. That is not the best first response when the issue is more consistent with poor hand placement or rushed use. A technician should address usage and capture quality before weakening authentication controls.
- C. Incorrect.
Incorrect. A shared local administrator account would create a major security and accountability problem, especially in a clinic where individual user identification matters. This would violate least-privilege and auditing best practices rather than solve the biometric usage problem.
- D. Incorrect.
Incorrect. Palm print scanners can be used effectively in many environments when deployed and used properly. The scenario points to user behavior during authentication, not proof that the technology is inherently unreliable in healthcare. Replacing the device without first addressing technique would be premature and unnecessarily costly.