Research & Evidence-Based Practice Flashcards

A CWNA professional is asked to prove that a recent firmware update improved network performance. Which research practice ensures a valid conclusion?

Answer: Collect baseline performance metrics before the update and compare identical metrics after deployment

Collecting identical quantitative metrics before and after the change creates a controlled comparison that isolates the firmware's effect on performance.

A wireless engineer is evaluating OFDMA efficiency gains in a dense environment. Which evidence directly demonstrates OFDMA's impact on airtime utilization?

Answer: Airtime utilization percentage measured before (OFDM) and after (OFDMA) enabling the feature under equivalent load

Measuring airtime utilization under equivalent load before and after enabling OFDMA directly quantifies its efficiency improvement on the wireless medium.

Which wireless troubleshooting framework most closely follows the evidence-based practice model?

Answer: Define the problem, collect data, form a hypothesis, test it, and validate the outcome

The define-collect-hypothesize-test-validate cycle mirrors the scientific method and ensures decisions are guided by data rather than assumptions.

A wireless architect references the Wi-Fi Alliance's Wi-Fi 7 certification program requirements. What is the primary research value of this document?

Answer: It defines the minimum interoperability and capability requirements that certified devices must meet

Wi-Fi Alliance certification requirements define the minimum interoperability criteria, helping architects predict consistent cross-vendor behavior in multi-vendor deployments.

A site survey reveals that measured SNR values are consistently 8 dB lower than predicted. What is the most evidence-based next step?

Answer: Investigate RF absorption and reflection factors (materials, obstacles) not modeled in the predictive tool and update the model

A systematic gap between predicted and measured SNR indicates the predictive model is missing environmental factors that must be identified and corrected before deployment.

Which combination of data sources provides the strongest evidence base for a comprehensive wireless capacity planning report?

Answer: Client density counts, per-client application bandwidth requirements, airtime utilization measurements, and RSSI coverage data

Combining client density, application bandwidth needs, airtime utilization, and RSSI data addresses all capacity planning dimensions with objective, measured inputs.

After deploying WPA3-Enterprise, a security team wants evidence that PMF (Protected Management Frames) is active for all clients. Which method provides direct verification?

Answer: Capture 802.11 frames and verify management frames include MIC fields, confirming PMF negotiation

Capturing frames and verifying the presence of MIC fields in management frames provides direct protocol-level evidence that PMF is actively protecting the management channel.