300-425 Sample Questions & Answers
Physical and logical AP and WLC infrastructure design takes the biggest share, alongside Layer 1 site-survey fundamentals, designing mobility groups for client roaming, and building high availability into both controllers and access points.
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- Question 1IntermediateSelect 2
As part of a wireless site survey in a hospital, an engineer needs to identify potential Layer 1 interferers. In which two areas is the engineer most likely to find sources of 2.4 GHz and 5 GHz RF noise? (Choose two.)
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Correct answers: C, E
- Question 2IntermediateSelect 3
Which three pieces of equipment are needed to conduct a fully measured wireless survey? (Choose three.)
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Correct answers: A, C, E
- Question 3IntermediateSelect 2
When conducting a site survey for real-time traffic over wireless, which two design capabilities of smartphones and tablets must be considered? (Choose two.)
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Correct answers: B, E
- Question 4IntermediateSelect 2
Which two criteria must be considered when conducting an outdoor bridge site survey? (Choose two.)
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Correct answers: A, E
- Question 5Intermediate
An engineer is performing a predictive wireless design for a medical treatment environment, which requires data and voice services. What is the minimum requirement for the design?
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Correct answer: C
- Question 6Intermediate
Which non-Wi-Fi interferer can be identified by Metageek Chanalyzer?
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Correct answer: B
- Question 7Advanced
Wired and Wireless Infrastructure · Determine physical infrastructure requirements such as AP antennas
A senior wireless architect is designing a high-density wireless network for a new sports stadium with a capacity of 60,000 seats. The design requires careful consideration of channel utilization and co-channel interference. Which specific antenna type and placement strategy would effectively minimize cell overlap between seating sections while maintaining high capacity?
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Correct answer: C
In stadium environments, under-seat deployment using omnidirectional or low-gain patch antennas is often preferred because the human bodies in the seats act as natural RF attenuators, isolating the cells from one another. This allows for higher frequency reuse and density compared to overhead directional antennas which may cover too large an area.
- Question 8Intermediate
Wireless Site Survey · Identify sources of RF interference
During a Layer 1 site survey of a manufacturing floor, a spectrum analyzer identifies a consistent source of interference sweeping across the entire 2.4 GHz band every 5 seconds. The duty cycle is approximately 50%. Based on the visual signature described, what is the most likely source of this interference?
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Correct answer: B
Microwave ovens typically emit interference that sweeps across a wide portion of the 2.4 GHz spectrum (often centered around 2450 MHz) and operate with a duty cycle that corresponds to the AC power cycle (50% for half-wave rectification). The sweeping nature and high duty cycle are characteristic signatures.
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