5.3 Troubleshoot Location Accuracy 300-430 Practice Questions (Page 6)

Questions 26–30

1. 26expert · hard

   A university's location system tracks laptops in a library. The location error is higher on the second floor than on the first floor. The second floor has many study rooms with glass walls. A spectrum analyzer shows no interference. The APs are correctly placed and calibrated. Which factor is most likely contributing to the higher error on the second floor?

   • AThe laptops on the second floor transmit at a lower power than those on the first floor, weakening the signals.
   • BThe glass walls cause multipath reflections that vary as people move through the study rooms, degrading the RSSI measurements.
   • CThe APs on the second floor are using a different channel than those on the first floor, causing interference.
   • DThe location engine uses a longer dwell time on the second floor, causing lag and error.
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2. 27application · medium

   A hospital's location system tracks infusion pumps. The reported positions are accurate when the pumps are stationary, but they lag behind when the pumps are moved quickly. The RSSI measurements are stable. Which parameter adjustment would best improve the tracking of moving pumps?

   • ALower the RSSI threshold to include more APs in the location calculation.
   • BIncrease the dwell time to collect more samples and improve accuracy.
   • CReduce the dwell time so the location engine updates the position more frequently.
   • DDisable the location engine's smoothing filter to eliminate lag.
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4. 28application · medium

   A museum uses location services to provide an audio guide that triggers based on the visitor's position. The location accuracy is poor in a gallery with high ceilings and marble floors. The APs are mounted on the ceiling, and the antennas are oriented downward. The location heatmap shows that the signal is strong but the distance error is high. Which adjustment is most likely to improve accuracy?

   • AMove the APs closer to the floor to reduce the distance between the AP and the client.
   • BTilt the antennas to a 45-degree angle to reduce multipath from the marble floor.
   • CIncrease the transmit power to overcome the reflection from the marble floor.
   • DChange the location algorithm to use a longer averaging window.
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5. 29application · medium

   A library's location system tracks book carts. The location error is higher during business hours than at night. The APs are correctly placed and calibrated. What is the most likely cause of the increased error during business hours?

   • AThe APs reduce their transmit power during the day to save energy, weakening the signals.
   • BThe location engine uses a longer dwell time during the day to handle more clients, causing lag.
   • CPeople and moving carts cause RF shadowing and multipath, which degrade the RSSI measurements used for location.
   • DThe book carts are moved faster during business hours, causing the location engine to miss updates.
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6. 30foundation · easy

   An engineer wants to visualize where location estimates are clustering incorrectly in a building. Which tool would be most appropriate?

   • ASpectrum analyzer
   • BProtocol analyzer
   • CClient simulator
   • DLocation heatmap
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