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CISSP · Question #1160

A security professional was tasked with rebuilding a company's wireless infrastructure. Which of the following are the MOST important factors to consider while making a decision on which wireless spec

The correct answer is B. Performance, geographic location, and radio signal interference. When selecting a wireless spectrum for deployment, the most critical factors are performance characteristics, geographic location constraints, and potential radio frequency interference sources.

Submitted by rachelw· Mar 5, 2026Communication and Network Security

Question

A security professional was tasked with rebuilding a company's wireless infrastructure. Which of the following are the MOST important factors to consider while making a decision on which wireless spectrum to deploy?

Options

  • AHybrid frequency band, service set identifier (SSID), and interpolation
  • BPerformance, geographic location, and radio signal interference
  • CFacility size, intermodulation, and direct satellite service
  • DExisting client devices, manufacturer reputation, and electrical interference

How the community answered

(26 responses)
  • A
    4% (1)
  • B
    77% (20)
  • C
    12% (3)
  • D
    8% (2)

Why each option

When selecting a wireless spectrum for deployment, the most critical factors are performance characteristics, geographic location constraints, and potential radio frequency interference sources.

AHybrid frequency band, service set identifier (SSID), and interpolation

SSID is a logical network identifier configured after spectrum selection and has no bearing on which wireless spectrum to deploy, and 'interpolation' is a mathematical/data estimation concept unrelated to wireless spectrum planning.

BPerformance, geographic location, and radio signal interferenceCorrect

Performance determines throughput and range capabilities of the chosen band (2.4 GHz offers longer range while 5/6 GHz offers higher throughput), geographic location affects regulatory channel availability and environmental propagation, and radio signal interference from neighboring networks or competing devices directly impacts spectrum usability and reliability. These three factors collectively drive the technical decision-making process for spectrum selection in an enterprise wireless deployment.

CFacility size, intermodulation, and direct satellite service

Intermodulation distortion and direct satellite service (DSS) are niche concerns unrelated to the core decision of choosing between available Wi-Fi spectrums, and while facility size matters, it is secondary to performance, location, and interference.

DExisting client devices, manufacturer reputation, and electrical interference

While existing client devices can be a consideration, manufacturer reputation is a procurement/vendor evaluation factor rather than a spectrum selection factor, and 'electrical interference' is too vague compared to the technically precise concept of radio signal interference covered in choice B.

Concept tested: Wireless spectrum selection criteria for infrastructure deployment

Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-3/b_Cisco_802_11ac_Wave2_Deployment_Guide/b_Cisco_802_11ac_Wave2_Deployment_Guide_chapter_010.html

Topics

#wireless security#network design#radio signal interference

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