JN0-452 Sample Questions & Answers
Free JNCIS-MistAI-Wireless practice questions with worked answers and explanations. See how the ExamJungle simulator prepares you — then jump into the full test.
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- Question 1IntermediateSelect 2
Mist Architecture · Cloud & Microservices
Which of the following statements correctly describes the architecture of the Juniper Mist cloud and its impact on firmware updates? (Select TWO)
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Correct answers: B, C
Mist's microservices architecture allows the cloud platform to update individual services (like the dashboard, analytics, or RRM algorithms) independently of the AP firmware. This ensures rapid feature velocity without downtime.
Mist APs maintain dual partitions for firmware. When upgrading, the new image is written to the inactive partition. If the boot fails, it can failover to the known good partition, ensuring resilience.
- Question 2Beginner
Operations · AP LED Status
Review the following diagram of a Mist AP's connection status.
What is the significance of the 'AP Up' status being green while the 'Cloud' status is red in the local status LED indicators?
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Correct answer: C
If the AP status is up (booted) but Cloud is red (or blinking in a specific pattern indicating loss), it means the AP cannot reach the Mist cloud controller. This is often due to firewall rules blocking outbound TCP 443 or DNS resolution failures.
- Question 3Advanced
WLAN/RF Basics · Roaming & RF Optimization
Case Study:
Company A is a logistics firm with a large warehouse. They are experiencing issues where barcode scanners (legacy 802.11b/g devices) drop connections frequently when moving between aisles.
The warehouse uses AP43s mounted 30 feet high. The current RF Profile is set to 'Auto' for power and channel. The network admin observes that the scanners tend to stick to a distant AP rather than roaming to the one directly overhead.
Which combination of configuration changes in the RF Profile would most effectively mitigate this 'sticky client' behavior for these legacy devices?
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Correct answer: B
Sticky clients often occur because they still see a 'good enough' signal from a distant AP (especially if APs are running high power). Lowering the max transmit power helps the client realize the signal is degrading sooner. Rx SOP helps the AP ignore weak signals from distant clients, encouraging the client to associate with a closer AP.
- Question 4Intermediate
Operations · Packet Capture
What is the primary function of the 'Dynamic Packet Capture' (dPCAP) feature in the Juniper Mist cloud?
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Correct answer: C
dPCAP is a key troubleshooting feature. Instead of an admin manually starting a capture and hoping to catch an intermittent issue, Mist automatically buffers packets and saves the capture when a bad event (like a failed association or authentication) is detected.
- Question 5Beginner
Mist AI Experience · SLE Definitions
True or False: In a Juniper Mist deployment, the 'Roaming' SLE metric only tracks Layer 3 roaming events between subnets.
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Correct answer: B
The Roaming SLE tracks the success and latency of standard Layer 2 (intra-subnet) roaming events, specifically looking at the time it takes for a client to re-associate and re-authenticate when moving between APs. It is not limited to Layer 3 roaming.
- Question 6Intermediate
Configuration · WxLAN Policies
An administrator creates a WxLAN policy to block a specific IoT device group from accessing the finance server. The IoT devices are on VLAN 20 and the finance server is on VLAN 30. Where is this policy enforced in the Mist architecture?
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Correct answer: A
WxLAN policies are enforced directly at the edge by the Mist AP. When a client matches the policy label, the AP drops or permits the traffic before it even enters the wired network.
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