300-425 · Question #233
An engineer must perform a predictive wireless survey to indicate the number of access points required. The engineer has created a new project and imported the floor plan. Which step must be taken…
The correct answer is C. Set the scale. In a predictive wireless survey, setting the scale of the imported floor plan is the mandatory next step so that the tool can calculate real-world distances and produce accurate coverage models.
Question
An engineer must perform a predictive wireless survey to indicate the number of access points required. The engineer has created a new project and imported the floor plan. Which step must be taken next for accurate AP placement?
Options
- AAnalyze the network.
- BIdentify the coverage area.
- CSet the scale.
- DPlace the access points.
How the community answered
(50 responses)- A2% (1)
- C94% (47)
- D4% (2)
Why each option
In a predictive wireless survey, setting the scale of the imported floor plan is the mandatory next step so that the tool can calculate real-world distances and produce accurate coverage models.
Analyzing the network is a post-placement step performed after APs have been positioned and the predictive model has been generated, not before the floor plan is calibrated.
Identifying the coverage area logically depends on an accurate scale - without it, the tool cannot compute what physical area an AP will cover.
Setting the scale maps the floor plan image to real-world dimensions, giving the survey software accurate distance and area measurements. Without a correct scale, the tool cannot model signal propagation, AP coverage radius, or overlap accurately, making every subsequent step - AP placement, coverage analysis - unreliable.
Placing access points before setting the scale produces predictions based on incorrect distances, invalidating the entire predictive model.
Concept tested: Predictive wireless survey floor plan scale calibration
Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/wireless_survey/wireless_survey.html
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