300-425 Question 171
Select 3A network engineer is troubleshooting location accuracy issues in a Cisco Hyperlocation deployment. The engineer observes that clients are not being accurately tracked within the expected 1-3 meter range. Which of the following actions should the engineer take to improve location accuracy?
- A
Ensure that all Access Points (APs) have their antennas properly calibrated and aligned.
- B
Verify that at least four Access Points can hear the same client at a minimum RSSI of -67 dBm.
- C
Increase the transmit power of Access Points to cover a larger area.
- D
Ensure the deployment is using 802.11ac or later wireless standards.
- E
Check for and minimize sources of multipath interference in the environment.
Show answer and explanation
Correct answers: A, B, E
Explanation
Cisco Hyperlocation relies on precise signal measurements and triangulation to determine a client's location. Ensuring proper antenna calibration, sufficient AP coverage with adequate RSSI, and minimizing multipath interference are key factors in maintaining high location accuracy. Increasing transmit power or relying solely on newer wireless standards does not directly address the root causes of location inaccuracy in Hyperlocation.
- A. Correct.
Proper antenna calibration and alignment are critical for accurate Hyperlocation since it relies on precise signal measurements. Misaligned antennas can lead to inaccurate location readings.
- B. Correct.
For Hyperlocation to function optimally, a minimum of four APs must detect the same client with sufficient signal strength (e.g., -67 dBm). Otherwise, the triangulation calculations may not be accurate.
- C. Incorrect.
Increasing the transmit power may extend coverage but can reduce location accuracy by introducing noise and overlapping cells, which can confuse location algorithms.
- D. Incorrect.
While using advanced wireless standards like 802.11ac improves general network performance, it does not directly impact Hyperlocation's accuracy.
- E. Correct.
Multipath interference can cause signal distortion and lead to inaccuracies in location tracking. Minimizing it helps improve the reliability of the Hyperlocation system.