5.3 Troubleshoot Location Accuracy 300-430 Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A university's location system shows a 'dead zone' where no location is reported for a large open area. The APs are mounted on the ceiling with antennas pointing straight down. A spectrum analyzer shows no interference. Which tool or action would best help identify the cause of the dead zone?

   • ACheck the location heatmap to see if the dead zone is due to a calibration gap.
   • BUse a client simulator to walk through the area and collect RSSI samples from the APs to verify coverage.
   • CIncrease the transmit power of the APs to extend coverage into the dead zone.
   • DDisable the location algorithm for that area and re-enable it after a few minutes.
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   A wireless engineer is investigating why location estimates for a client device are inaccurate. Which factor is a common source of location inaccuracy in an indoor Wi-Fi environment?

   • AThe access point having a 5 GHz radio disabled
   • BMultipath propagation causing signal reflections
   • CThe client device being in power save mode
   • DThe client device using a wired Ethernet connection
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   A manufacturing plant uses location tracking for safety equipment. The location engine reports that a worker's badge is sometimes located in a different building, hundreds of meters away. 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 badge is in power-save mode and only transmits occasionally, so the location engine has very few samples to work with.
   • BThe badge is 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.
   • CThe badge is roaming between APs, and the location engine is using stale RSSI data from the previous AP.
   • DThe badge is transmitting at a very low data rate, which causes the APs to receive it with low RSSI.
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   An office location system tracks employees' badges. The reported positions frequently jump between two adjacent rooms, even when the badge is stationary. The RSSI from the badge is stable. Which parameter adjustment is most likely to reduce the jumping?

   • ALower the RSSI threshold to allow the location engine to use more APs, improving the position calculation.
   • BDisable the location engine's smoothing filter to allow faster response to actual movement.
   • CIncrease the transmit power of the APs to improve signal strength in both rooms.
   • DIncrease the dwell time so the location engine uses a longer observation window before deciding the position.
   Reveal Solution Discussion Select an answer first
6. 15expert · hard

   A hospital is deploying a location system for tracking infusion pumps. The system must achieve 3-meter accuracy in a 24/7 operational environment. The APs are already installed on the ceiling in a grid pattern, but the calibration was performed during off-hours when the corridors were empty. During the day, the location error increases to 6 meters. A spectrum analyzer shows no interference. The hospital cannot add or move APs due to cost and construction constraints. Which approach is most likely to improve daytime accuracy?

   • AUse a client simulator to verify coverage and then adjust the antenna orientation of the existing APs.
   • BRecalibrate the location system during peak activity hours to capture the RF environment with people and equipment present.
   • CIncrease the dwell time to average more samples, reducing the impact of transient RF changes.
   • DLower the RSSI threshold to include more APs in the location calculation, improving the chances of getting a good fix.
   Reveal Solution Discussion Select an answer first