When should a Layer I site survey be performed?

Question

Options

• Abriefly during the predictive site survey
• Bbriefly during the passive site survey
• Cfor an extended period of time during the predeployment site survey and during the post-deployment site
• Dfor an extended period of time during the predeployment site survey only

• B
  4% (1)
• C
  92% (23)
• D
  4% (1)

Explanation

A Layer 1 site survey uses a spectrum analyzer to detect non-802.11 RF interference sources such as microwave ovens, Bluetooth devices, cordless phones, and radar. It must be performed for an extended period of time-not briefly-because many interference sources are intermittent and may only appear during specific hours (e.g., lunch breaks, shift changes, or scheduled equipment use). It should be conducted both during the pre-deployment phase (to identify existing interference before designing the network) and during the post-deployment phase (to confirm the deployed network is not affected by new or previously undetected interference). Performing it only briefly or only during passive/predictive surveys would miss transient interference sources and provide an incomplete picture of the RF environment.

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