What is the hidden node problem in a wireless network?

A station that transmits at a higher power than allowed, interfering with other cells

A station that cannot hear the access point's beacon and therefore cannot associate

A station that uses a different channel than the access point, causing interference

Two stations that are out of range of each other but both in range of the access point, causing potential collisions at the AP

What does a station do while its Network Allocation Vector (NAV) is non-zero?

It may transmit if the physical medium is idle

It immediately transmits a CTS frame to clear the reservation

It sends an RTS frame to request access

It defers access to the medium until the NAV reaches zero

In a Wi-Fi network, what is the primary purpose of the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) mechanism?

To allow multiple devices to share the wireless medium by listening before transmitting and avoiding simultaneous transmissions

To detect collisions after they occur and retransmit the corrupted frames

To prioritize traffic by allowing high-priority frames to transmit without any waiting period

To assign each station a unique time slot for transmission, eliminating the need for carrier sensing

In the Distributed Coordination Function (DCF), what happens when a station finds the wireless medium busy before attempting to transmit?

It drops the frame and waits for the next beacon interval

It waits for the medium to be idle for a DIFS period and then selects a random backoff timer

It immediately transmits after the current frame ends

It sends a jamming signal to force other stations to back off

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

Domain 1Objective 5

Network Arbitration and Contention 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 26 practice questions to prepare you well beyond it. (estimate)

26questions here

6free pages

12concepts

Questions 21–25

21foundation · easy
What is the hidden node problem in a wireless network?
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22foundation · easy
What does a station do while its Network Allocation Vector (NAV) is non-zero?
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23foundation · easy
In EDCA, which access category typically has the smallest AIFS and contention window, giving it the highest priority?
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24foundation · easy
In a Wi-Fi network, what is the primary purpose of the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) mechanism?
Select an answer first
25foundation · easy
In the Distributed Coordination Function (DCF), what happens when a station finds the wireless medium busy before attempting to transmit?
Select an answer first

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