Juniper JN0-452 Practice Exams
Last updated on Oct 22,2026- Exam Code: JN0-452
- Exam Name: Juniper Mist AI Wireless, Specialist (JNCIS-MistAI-Wireless)
- Certification Provider: Juniper
- Latest update: Oct 22,2026
Which modulation technique can transmit 8 bits per symbol and requires very high SNR to function properly?
- A . BPSK
- B . 256-QAM
- C . QPSK
- D . 16-QAM
B
Explanation:
256-QAM can transmit 8 bits per symbol, offering very fast data rates. However, it requires a very clean signal (high SNR) to avoid errors. It’s common in modern high-performance Wi-Fi.
What is the purpose of RTS/CTS in a Wi-Fi network?
- A . Encrypts wireless frames for privacy
- B . Balances frequency bands across clients
- C . Prevents collisions from hidden nodes
- D . Assigns IP addresses via DHCP
C
Explanation:
RTS (Request to Send) and CTS (Clear to Send) help avoid collisions in scenarios where some devices cannot hear each other (hidden nodes). It’s an optional mechanism in dense environments.
A security team wants to analyze user connection performance over the past 30 days.
Which Mist feature allows this kind of long-term analysis?
- A . Historical Network Insights
- B . Instant Roaming Alerts
- C . DHCP Reservation Table
- D . Band Steering Preference Logs
A
Explanation:
Historical Network Insights allow up to 90-day retrospective analysis of SLEs, events, and usage trends to support audits and performance reviews.
Which of the following Service Level Expectations (SLEs) is designed to measure the quality of seamless client movement between APs?
- A . Time to Connect
- B . Coverage
- C . Roaming
- D . Throughput
C
Explanation:
The Roaming SLE measures how quickly and smoothly a client transitions from one AP to another. A common threshold is under 500 milliseconds.
Which threat can Mist’s WIPS functionality detect?
- A . Encrypted DNS hijacking
- B . Rogue AP broadcasting unauthorized SSID
- C . Overuse of SLE scoring by clients
- D . Invalid firmware on Mist Edge
B
Explanation:
Mist’s WIDS/WIPS can detect unauthorized (rogue) APs broadcasting SSIDs and alert administrators or trigger auto-containment if configured.
An enterprise wants to integrate Mist with its ServiceNow platform. The goal is to receive real-time alerts when APs go offline and automatically create IT tickets.
Which Mist feature is used in this integration?
- A . Syslog forwarding
- B . BLE triangulation events
- C . REST API with hourly polling
- D . Webhooks with event-based triggers
D
Explanation:
Mist supports Webhooks to push real-time notifications (e.g., AP offline, SLE violations) to third-party platforms like ServiceNow, Teams, or Slack for automated incident handling.
After enabling a Mist-hosted captive portal for guest Wi-Fi, users complain they don’t receive the login page on their phones.
What is the **most likely cause**, and how can the administrator fix it?
- A . The portal was not set to intercept unauthenticated traffic (missing redirect policy)
- B . The SSID was hidden, so DNS redirection failed
- C . The SSID uses WPA3-Enterprise, which blocks captive portals
- D . Client SNR is too low to load web pages
A
Explanation:
If unauthenticated guest traffic isn’t redirected to the captive portal, users will never see the login page. Mist must be configured to intercept and redirect initial web requests properly.
A Mist administrator observes that several APs in a conference room are showing increased retry rates and degraded SLE scores. Users report that Wi-Fi becomes slow during events.
What Mist feature is designed to help **automatically resolve** this kind of channel interference issue?
- A . Marvis Actions
- B . Manual SSID rebroadcasting
- C . Fixed transmit power profiles
- D . Roaming priority settings
A
Explanation:
Marvis Actions can automatically perform network optimizations like adjusting channel plans and transmit power to reduce interference and improve client experience based on detected SLE degradation or event patterns.
Which of the following Mist LBS use cases is best aligned with proximity tracing?
- A . Turn-by-turn directions in a convention center
- B . Recording the time two employees spend within 2 meters of each other
- C . Showing exhibit information when a user enters a museum zone
- D . Finding the shortest indoor path between two points
B
Explanation:
Proximity tracing logs the amount of time devices or users are within a defined distance (e.g., 2 meters), useful for health compliance and contact tracking.
A retail site uses Marvis Minis to test guest Wi-Fi hourly. One morning, the test fails to load the captive portal and shows DNS lookup failed. No users had reported it yet.
What does this scenario best illustrate?
- A . A roaming delay between SSIDs
- B . The value of synthetic testing for preemptive alerts
- C . The need to disable Marvis at quiet hours
- D . Band steering misconfiguration
B
Explanation:
Marvis Minis act as **automated test clients**. The test result showed a DNS/captive portal failure **before** any users complained ― proving the value of proactive synthetic testing.