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300-360 · Question #236

You are designing a wireless network for a small square office. The office can be covered wirelessly by using a couple access points, but the customer requests that the Wi-Fi network be…

The correct answer is A. in the four corners of the office. A location-ready Wi-Fi network requires multiple access points with overlapping coverage to support client triangulation, and Cisco best practice is to place APs in the four corners of the coverage area.

WLAN Design

Question

You are designing a wireless network for a small square office. The office can be covered wirelessly by using a couple access points, but the customer requests that the Wi-Fi network be "location-ready". Where do you place the access points based on best practices?

Options

  • Ain the four corners of the office
  • Btwo far end corners of the office
  • Cone in the center of the office
  • Dtwo placed 80 feet apart

How the community answered

(38 responses)
  • A
    89% (34)
  • B
    3% (1)
  • C
    5% (2)
  • D
    3% (1)

Why each option

A location-ready Wi-Fi network requires multiple access points with overlapping coverage to support client triangulation, and Cisco best practice is to place APs in the four corners of the coverage area.

Ain the four corners of the officeCorrect

Placing APs in the four corners of the office ensures that at least three APs can hear any given client device simultaneously at the signal strength required for location accuracy. Cisco Connected Mobile Experiences (CMX) and similar location engines depend on this multi-AP overlap to triangulate a client's position across the entire floor, and corner placement maximizes the geometric spread needed for that calculation.

Btwo far end corners of the office

Using only two far-end corners provides coverage from just two APs, which is insufficient for the three-AP triangulation required by location services.

Cone in the center of the office

A single center AP provides RF coverage but cannot support location services because position calculation requires multiple APs hearing the same client simultaneously.

Dtwo placed 80 feet apart

Specifying a fixed distance of 80 feet between two APs ignores office geometry and does not guarantee the multi-AP overlap needed for location accuracy in all areas of the space.

Concept tested: Access point placement for Wi-Fi location services

Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-8/b_optimizing_wifi_network_with_cmx.html

Topics

#location services#AP placement#location-ready design#best practices

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