5.3 Troubleshoot Location Accuracy 300-430 Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   A warehouse deployment uses a dense AP grid for location tracking of forklifts. The location engine reports that tracked assets frequently jump between aisles, and the distance error metric shows a median error of 12 meters. A spectrum analysis reveals strong non-Wi-Fi interference in the 2.4 GHz band from a newly installed conveyor motor control system. The APs are dual-band and the forklift tags are dual-band capable. Which action is most likely to improve location accuracy?

   • AIncrease the RSSI threshold for location reporting so that only very strong signals from the tags are used.
   • BDisable the 2.4 GHz radios on the APs and configure the location engine to use only 5 GHz RSSI data.
   • CAdd more APs in the affected aisle to increase the density of the location grid.
   • DLower the dwell time for the location engine so that it averages RSSI samples over a shorter period.
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2. 17application · medium

   A university campus uses location services to track mobile devices for a wayfinding app. Users report that their location on the map is often inaccurate in a large open plaza. The location heatmap shows a 'hole' in the middle of the plaza where few APs are detected. The distance error metric is high in that area. Which tool or technique is most appropriate to isolate the cause?

   • AAdjust the dwell time to increase the number of samples per location update.
   • BUse a spectrum analyzer to check for interference in the plaza.
   • CReview the location heatmap to identify areas with insufficient AP coverage.
   • DRun a client simulator to test the location engine's response to synthetic clients.
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4. 18application · medium

   A factory uses location tracking for tools. The location engine reports that the tools' positions are sometimes reported in a different area of the factory, far from their actual location. The distance error metric shows occasional extreme outliers. The RF environment is clean, and AP placement is correct. Which client behavior is the most likely cause of these outliers?

   • AThe tools are associating to a distant AP due to a sticky client behavior, and the location engine uses that AP's RSSI as a primary data point.
   • BThe tools are roaming between APs, and the location engine is using stale RSSI data from the previous AP.
   • CThe tools are in power-save mode and only transmit occasionally, so the location engine has very few samples.
   • DThe tools are transmitting at a very low data rate, which causes the APs to receive them with low RSSI.
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5. 19application · medium

   A corporate office uses location services to find available meeting rooms. The location accuracy is poor in a conference room with floor-to-ceiling glass walls. The APs are mounted on the ceiling, and the antennas are omnidirectional. The location heatmap shows that the signal is strong but the distance error is high. Which factor is the most likely cause of the inaccuracy?

   • AIncorrect antenna orientation, which causes the signal to be directed away from the room.
   • BSignal absorption by the glass walls, which reduces the RSSI from the APs.
   • CInsufficient AP density in the conference room.
   • DMultipath caused by reflections from the glass walls, which distort the RSSI measurements.
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6. 20application · medium

   A factory's location system tracks workers' badges. The location error is highest near a large metal conveyor belt that moves continuously. A spectrum analyzer shows no external interference. What is the most likely cause of the inaccuracy?

   • AThe badges are transmitting at too low a power, so the APs cannot hear them reliably.
   • BThe location engine is using an outdated floor plan that does not include the conveyor belt.
   • CMultipath reflections from the metal conveyor belt cause the location engine to receive distorted RSSI measurements.
   • DThe APs are overloaded with too many associated clients, causing them to drop location packets.
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