Get Valid Juniper JN0-452 Exam Dumps For Best Preparation
Exam
:
JN0-452
Title
: Juniper Mist AI Wireless,
Specialist
(JNCIS-MistAI-Wireless)
https://www.passcert.com/JN0-452.html
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1.A university deploys a new Wi-Fi network in a lecture hall where over 200 students connect at the same
time using modern devices.
Which combination of frequency band and channel width would provide the **best performance** and
**least interference** in this dense environment?
A. 2.4 GHz with 40 MHz channels
B. 5 GHz with 160 MHz channels
C. 2.4 GHz with 20 MHz channels
D. 6 GHz with 80 MHz channels
Answer: D
Explanation:
In a high-density environment with modern devices, 6 GHz offers wide, clean spectrum with less legacy
interference. 80 MHz provides high throughput while avoiding the interference risks of 160 MHz in
congested areas.
2.A network engineer notices that a user is experiencing poor video quality despite being physically close
to the AP. The RSSI is measured at -55 dBm, but the SNR is only 15 dB.
What is the most likely cause of the issue?
A. Signal attenuation due to distance
B. Roaming failure during authentication
C. Interference from neighboring APs or noise sources
D. Low channel width configuration
Answer: C
Explanation:
A strong RSSI (-55 dBm) but low SNR (15 dB) indicates there is high background noise or interference,
not signal weakness. This degrades the usable signal quality and affects performance even at close
range.
3.A company enables 160 MHz channels on all 5 GHz APs to maximize speed. However, users report
unstable performance in open office areas.
What is the **most likely technical reason** for this problem?
A. Wide channels overlapping and increasing interference
B. Clients only supporting 2.4 GHz band
C. Excessive collision detection by CSMA/CD
D. Channel width too narrow for high data rates
Answer: A
Explanation:
160 MHz channels are wide and can easily overlap with other nearby APs using the same frequency. This
leads to increased interference and instability in shared environments. A narrower width (40/80 MHz) may
perform better.
4.During a roaming event, a client device moves from one AP to another. The connection drops briefly and
then resumes. A packet trace shows the client sent a **probe request**, then performed **authentication**
and **association** again.
What IEEE 802.11 standard could help minimize this disruption?
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A. 802.11a
B. 802.11ac
C. 802.11r
D. 802.11b
Answer: C
Explanation:
802.11r (Fast BSS Transition) is specifically designed to reduce handoff times during roaming by
pre-authenticating the client with nearby APs. It ensures seamless transitions, especially for real-time
apps like VoIP or video.
5.A technician is analyzing performance metrics of a Mist AP and observes that a large number of Wi-Fi
frames are being retransmitted.
Which metric is most directly impacted by this, and what could be a possible cause?
A. SNR – caused by incorrect password attempts
B. Retry Rate – caused by interference or poor signal quality
C. Channel Width – caused by large frame sizes
D. RSSI – caused by excessive DFS channel switching
Answer: B
Explanation:
A high Retry Rate means data frames are failing on the first attempt and need to be retransmitted, often
due to interference, collisions, or low SNR. It directly impacts throughput and latency in the network.
6.What is one of the key benefits of Mist’s cloud-native architecture compared to traditional WLAN
solutions?
A. Supports layer 3 roaming by default
B. Requires local CLI access for AP provisioning
C. Eliminates the need for on-premises wireless controllers
D. Limits API usage to predefined scripts only
Answer: C
Explanation:
Mist’s cloud-native architecture removes the need for on-site wireless controllers. All provisioning,
monitoring, and configuration are done via the cloud.
7.In the Mist organization hierarchy, what is the primary purpose of the “Site” level?
A. Create API access tokens
B. Monitor the entire organization’s traffic
C. Represent a specific physical location with its own APs and settings
D. Manage global templates and user roles
Answer: C
Explanation:
Each “Site” in Mist represents a physical location (e.g., office, store, campus) and can have its own APs,
VLANs, and configurations.
8.What is the function of the WxLAN feature in Mist?
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A. Assigns VLANs dynamically based on user/device identity
B. Encrypts data traffic using WPA3 only
C. Automatically tunnels guest traffic to the cloud
D. Extends wired VLANs into remote data centers
Answer: A
Explanation:
WxLAN allows Mist to apply role-based access policies and assign VLANs dynamically based on identity
(e.g., employee, guest, printer), even on the same SSID.
9.What is the purpose of Mist Edge in a network deployment?
A. Backup cloud configurations locally during outages
B. Centralize AP firmware upgrades across organizations
C. Provide high-availability DHCP services over WAN
D. Enable on-premises traffic forwarding and privacy control
Answer: D
Explanation:
Mist Edge is used when certain traffic needs to remain on-premises due to privacy, performance, or
regulatory concerns. It handles local DHCP, traffic forwarding, and data breakout.
10.What role does the “Site-level Admin” have in Mist’s role-based access control system?
A. Has read-only access across all sites
B. Can manage only a specific site’s configuration and APs
C. Can manage API tokens and automation
D. Can create and delete organizations
Answer: B
Explanation:
A Site-level Admin has privileges only within a specific site. They can manage APs, templates, and
configurations but not global settings or other sites.
11.What is a key function provided by Mist Webhooks?
A. Launch virtual SSIDs on-demand
B. Poll client status periodically via SNMP
C. Automate monthly license renewals via cloud
D. Notify external systems in real-time about events like AP disconnections
Answer: D
Explanation:
Webhooks in Mist provide real-time event notifications (e.g., AP offline, client connect failure, SLE
violations) to external platforms like Slack, ServiceNow, or SIEM systems.
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