350-401 Question 26
Select 2You are designing a WLAN for a large enterprise campus that requires high-accuracy location services to track Wi-Fi-enabled devices, such as employee badges and inventory tags. Which of the following considerations are critical to achieve accurate location tracking in this WLAN design?
- A
Deploy Access Points (APs) in a grid pattern with a minimum of 3 APs covering each location.
- B
Ensure all APs are configured to use 5 GHz only for location tracking.
- C
Place APs at a uniform height and avoid placing them too close to walls or obstructions.
- D
Enable 802.11k and 802.11v protocols to enhance client-side location accuracy.
- E
Use directional antennas to focus the coverage area of each AP.
Show answer and explanation
Correct answers: A, C
Explanation
Accurate location services in WLAN designs rely on triangulation, which requires a minimum of 3 APs to cover any given area. AP placement is also critical, as uniform height and minimal obstructions ensure consistent signal strength and quality. Other factors, such as enabling specific protocols or using directional antennas, may improve other aspects of WLAN performance but do not directly enhance location accuracy.
- A. Correct.
Deploying APs in a grid pattern and ensuring at least 3 APs cover each location allows for triangulation, which is essential for accurate location tracking.
- B. Incorrect.
While 5 GHz offers higher bandwidth, it is not specifically required for location tracking. Both 2.4 GHz and 5 GHz can be used for this purpose.
- C. Correct.
Placing APs at a uniform height and avoiding obstructions helps ensure consistent signal propagation, which is critical for accurate location estimations.
- D. Incorrect.
While 802.11k and 802.11v improve roaming and client-side performance, they do not directly influence the accuracy of server-side location tracking in WLAN designs.
- E. Incorrect.
Directional antennas are typically used to focus signals in specific areas, which can reduce coverage overlap and hinder the ability to achieve accurate triangulation.