A retail store is planning a Wi-Fi deployment. The store has concrete walls, glass storefronts, and wooden shelving. The design team wants to maximize coverage in the back office, which is separated from the sales floor by a concrete wall. Which material will cause the most significant signal degradation for the back office coverage?

Air between the AP and the back office

A network engineer is troubleshooting a Wi-Fi issue in a large atrium with glass walls and a metal roof. Clients report that data rates are consistently low even though the signal strength is excellent. The engineer suspects multipath. Which additional observation would best confirm multipath as the cause?

The AP reports a high number of retries on all channels

The data rate is consistently low regardless of client position

The data rate improves when the client moves a few centimeters

The noise floor is significantly higher than normal

Juniper NetworksCertified Specialist, Mist AI Wireless (JNCIS-MistAI)

Domain 1Objective 3

RF Basics JN0-452 Practice Questions (Page 5)

Part of the Wi-Fi Fundamentals domain, which makes up ~20% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~7–12 in this domain), expect 1–2 from this objective — we provide 33 practice questions to prepare you well beyond it. (estimate)

33questions here

7free pages

10concepts

Questions 21–25

21foundation · easy
Which RF signal property is inversely proportional to frequency?
Select an answer first
22expert · hard
A client device is moving away from an AP. The AP's receiver sensitivity is -85 dBm, and the noise floor is -95 dBm. At what received signal strength will the client likely experience a significant drop in data rate?
Select an answer first
23application · easy
A retail store is planning a Wi-Fi deployment. The store has concrete walls, glass storefronts, and wooden shelving. The design team wants to maximize coverage in the back office, which is separated from the sales floor by a concrete wall. Which material will cause the most significant signal degradation for the back office coverage?
Select an answer first
24expert · hard
A hospital is deploying Wi-Fi in an area with lead-lined walls for radiology. The design team must ensure coverage in the adjacent waiting room. The lead-lined wall causes 30 dB of attenuation. The AP has 20 dBm output and a 3 dBi antenna. The client's receiver sensitivity is -85 dBm. What is the maximum acceptable path loss (excluding the wall) for the link to work?
Select an answer first
25expert · hard
A network engineer is troubleshooting a Wi-Fi issue in a large atrium with glass walls and a metal roof. Clients report that data rates are consistently low even though the signal strength is excellent. The engineer suspects multipath. Which additional observation would best confirm multipath as the cause?
Select an answer first

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RF Basics JN0-452 Practice Questions (Page 5)

Questions 21–25

Which RF signal property is inversely proportional to frequency?

A client device is moving away from an AP. The AP's receiver sensitivity is -85 dBm, and the noise floor is -95 dBm. At what received signal strength will the client likely experience a significant drop in data rate?

Keep studying — Wi-Fi Fundamentals