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Juniper JN0-452 Exam Syllabus Topics:

Section	Weight	Objectives
Marvis Virtual Network Assistant	15%	- Natural language queries and actions - Proactive and reactive troubleshooting - Marvis concepts and capabilities
Juniper Mist WLAN Architecture and Deployment	20%	- Mist cloud architecture and components - Initial setup and access point deployment - API and webhook fundamentals - Account, organization and site management
Juniper Mist Network Operations	15%	- Radio Resource Management (RRM) - Wi-Fi Assurance and Service Level Expectations (SLE) - Monitoring and troubleshooting workflows - Events, alerts and insights
Wi-Fi Fundamentals	20%	- Frequency bands and RF principles - WLAN association, roaming and lifecycle - 802.11 PHY protocols - Modulation, coding and channel access
Juniper Mist Location-Based Services	10%	- User engagement and asset tracking - Proximity services and analytics - Wi-Fi and vBLE location technologies
Juniper Mist WLAN Concepts	20%	- WLAN configuration and security - Wireless intrusion detection and prevention - Multi-PSK and advanced policy features - WxLAN policies and guest services

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Juniper Mist AI Wireless, Specialist (JNCIS-MistAI-Wireless) Sample Questions (Q123-Q128):

NEW QUESTION # 123
You connect your Juniper Access Point to your switch and verify that the power is on, your Ethernet link is functioning, and an IP address is properly assigned. However, your access point is not appearing as connected on the Juniper Mist dashboard as the LED blink code indicates no cloud connectivity.
What would be the next step in determining the problem?

A. Verify that the Juniper Access Point is communicating properly with the DHCP server.
B. Verify that UDP port 53 and TCP port 443 are open on your enterprise firewall.
C. Verify that UDP port 53 and TCP port 80 are open on your enterprise firewall.
D. Verify that your Wi-Fi assurance license has not expired.

Answer: B

Explanation:
A Juniper AP requires DNS resolution and HTTPS access to reach the Mist cloud. Since the AP has power, Ethernet, and an IP address but shows no cloud connectivity, the next step is to verify that DNS over UDP 53 and HTTPS over TCP 443 are allowed through the enterprise firewall.

NEW QUESTION # 124
A college is experiencing poor Wi-Fi performance in a lecture hall. An administrator reviews the SLE dashboards and finds that while Coverage and Successful Connects are good, the Capacity and Throughput SLEs are very low during class times. The primary classifier for the Capacity failure is "High Bandwidth Utilization," and the primary classifier for the Throughput failure is
"Capacity." What is the most logical conclusion and the best course of action?

A. The issue is non-Wi-Fi interference; the administrator should use a spectrum analyzer to find the source.
B. The issue is that the network is overwhelmed by the sheer volume of client traffic; the administrator should investigate adding more APs or enabling features like dual 5 GHz operation.
C. The issue is weak signal; the transmit power of the APs should be increased.
D. The issue is client authentication; the RADIUS server should be checked for latency.

Answer: B

NEW QUESTION # 125
At which signal strength level range will an extra AP placed on the same channel cause co-channel contention?

A. -45 dBm to -65 dBm
B. -55 dBm to -80 dBm
C. -25 dBm to -80 dBm
D. -65 dBm to -85 dBm

Answer: A

Explanation:
In the context of Juniper Mist AI and high-performance wireless design,Co-Channel Contention (CCC)- often referred to as Co-Channel Interference (CCI)-occurs when two or more access points (APs) share the same frequency channel and are within "hearing" distance of one another.1The key to understanding this specific range lies in the802.11 CSMA/CAmechanism, specifically theClear Channel Assessment (CCA) process.
When a Mist AP or a client device wants to transmit, it first performs a CCA. If it detects a Wi-Fi preamble from another device on the same channel at a signal strength above theSignal Detect (SD)threshold (typically around -82 to -85 dBm for many radios, though performance drops much sooner), it must defer its transmission. However, for "contention" to become a significant performance bottleneck that triggers Mist SLE alerts, the signal strength usually falls within the-45 dBm to -65 dBmrange.
In this range, the signals are strong enough that the APs are effectively "in the same room" or nearby rooms, meaning they will constantly see the medium as "busy" whenever the other AP is transmitting. This effectively merges the two APs into a single contention domain, forcing them to share the total available airtime. For example, if two APs on the same channel both see each other at -60 dBm, they cannot transmit simultaneously; instead, they must take turns.
Mist'sRadio Resource Management (RRM)and theCapacity SLEspecifically monitor for these overlapping BSS (OBSS) conditions. If the AI detects that an AP is seeing a neighbor on the same channel at these high signal levels, it will attempt to change the channel or reduce transmit power to "shrink" the cell size, aiming to push the neighbor's signal strength below the point where it causes constant deferrals, thereby improving the overall capacity and user experience for the site.

NEW QUESTION # 126
What is a key benefit of using the Mist API for a large enterprise?

A. It replaces the need for Wi-Fi Assurance subscriptions.
B. It is the only way to configure APs.
C. It allows for the automation of repetitive tasks, such as creating multiple WLANs or onboarding new sites.
D. It provides a graphical interface for network management.

Answer: C

NEW QUESTION # 127
You need to create a security policy that blocks IoT devices from accessing the corporate financial servers.
In the Mist UI, what is the first step to creating this rule within a WxLAN policy?

A. Use the Marvis conversational interface to block the traffic.
B. Assign labels to the IoT devices and the financial servers.
C. Create a new WLAN for the IoT devices.
D. Configure a new RF template for the IoT device location.

Answer: B

NEW QUESTION # 128
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