What is the purpose of the RTS/CTS handshake in an 802.11 network?

To reserve the medium and mitigate the hidden node problem

To authenticate stations and establish encryption keys

To negotiate the data rate and modulation scheme

To synchronize the timing of all stations in the BSS

What is the purpose of Enhanced Distributed Channel Access (EDCA) in 802.11e/Wi-Fi QoS?

To eliminate collisions by using a centralized scheduler

To provide prioritized access to the medium for different traffic categories

To increase the physical data rate by aggregating frames

To provide a contention-free period for voice traffic

What is the primary role of the DIFS (DCF Interframe Space) in a standard 802.11 network?

It is the gap between data frames and their acknowledgments

It is used by the access point to poll stations in a contention-free period

It is the waiting period before a station can transmit regular data frames in DCF

It is the minimum backoff interval for high-priority voice traffic

What is the difference between physical carrier sensing and virtual carrier sensing in 802.11?

Physical sensing is optional; virtual sensing is mandatory

Physical sensing detects RF energy on the medium; virtual sensing uses the NAV to predict when the medium will be busy

Physical sensing is used only by the access point; virtual sensing is used by stations

Physical sensing uses the NAV; virtual sensing uses the radio frequency energy

Which interframe space is the shortest and is used for high-priority transmissions such as acknowledgments and clear-to-send frames?

AIFS (Arbitration Interframe Space)

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

Domain 1Objective 5

Network Arbitration and Contention JN0-452 Practice Questions (Page 3)

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 11–15

11foundation · easy
What is the purpose of the RTS/CTS handshake in an 802.11 network?
Select an answer first
12foundation · easy
What is the purpose of Enhanced Distributed Channel Access (EDCA) in 802.11e/Wi-Fi QoS?
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13foundation · easy
What is the primary role of the DIFS (DCF Interframe Space) in a standard 802.11 network?
Select an answer first
14foundation · easy
What is the difference between physical carrier sensing and virtual carrier sensing in 802.11?
Select an answer first
15foundation · easy
Which interframe space is the shortest and is used for high-priority transmissions such as acknowledgments and clear-to-send frames?
Select an answer first

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