Predictive Wireless Design Power Level for Location Readiness
An engineer must perform a predictive design for a wireless network for location readiness and to mitigate interference. Which power level does the engineer use?
Community Votes
50% of anonymous learners picked answer C. Votes are pick records left by other test-takers — they are not the verified answer.
Community Insight
Tests knowledge of AP-to-client power asymmetry in predictive models, where using maximum AP power leads to inaccurate coverage predictions.
Determines the optimal transmit power level for predictive wireless design to ensure location readiness and interference mitigation. Establishes that 10 mW is the correct setting for accurate client representation.
Candidates often select higher power levels like 50 mW (D) or 20 mW (C), assuming they represent standard operating conditions rather than the specific constraints required for location accuracy.
Community Discussion (6 comments)
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Expert Analysis
Why the Answer Is Correct
The correct answer is A (10 mW). In predictive design for location readiness, it is critical to model the network based on the capabilities of the client devices rather than the maximum output of the Access Point (AP). Client devices typically have lower transmit power than APs. By setting the AP transmit power to a level closer to what clients can support (often recommended as half the max client power or specifically low like 10 mW for simulation), the engineer ensures that the predicted cell sizes are realistic and not overly optimistic. This reduces the risk of co-channel interference and improves the accuracy of location-based services.Why the Other Options Are Wrong
Options B (18 mW), C (20 mW), and D (50 mW) represent significantly higher power levels. While these might be typical maximum outputs for enterprise APs, using them in a predictive model designed for location readiness creates a 'phantom' coverage area that clients cannot actually reach. This discrepancy leads to poor signal strength at the edges of cells and inaccurate triangulation data for location services. The goal is to mitigate interference by ensuring overlap is minimized according to actual client reception capabilities.Community Comment Notes
User rlss92 correctly identifies 10 mW, noting it provides a consistent representation of client device power levels which are usually lower than AP maximum output. User Jonycici argues for 50 mW but references a Cisco doc regarding phone default powers; however, this refers to operational defaults, not the specific constraint for location-ready predictive modeling. Farhad123 suggests keeping AP power reduced to half the maximum expected client power, which aligns with the rationale for choosing the lowest option to prevent excessive cell overlap.Exam Strategy
When designing for location services, always prioritize client-side constraints over AP-side capabilities in your predictive models. If an exam question asks about optimizing for location readiness or minimizing interference in a predictive context, look for the lowest reasonable transmit power settings that still provide coverage.
Frequently Asked Questions
Why not use 50 mW for better coverage in predictive design?
Using 50 mW assumes all clients can transmit at that power, leading to oversized cell predictions and inaccurate location data since most clients have lower TX power.
Is 10 mW too low for real-world coverage?
In predictive design for location readiness, the goal is accuracy of the model relative to client limits, not necessarily maximizing range. It simulates the worst-case client scenario.