CISSP Question #1160: Real Exam Question with Answer & Explanation

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

Explanation

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

Common mistakes.

• A. 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.
• C. 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.
• D. 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

Reference. 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

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