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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Juniper Mist WLAN Architecture and Deployment | 20% | - API and webhook fundamentals - Initial setup and access point deployment - Account, organization and site management - Mist cloud architecture and components |
| Topic 2: Juniper Mist Network Operations | 15% | - Events, alerts and insights - Wi-Fi Assurance and Service Level Expectations (SLE) - Monitoring and troubleshooting workflows - Radio Resource Management (RRM) |
| Topic 3: Wi-Fi Fundamentals | 20% | - 802.11 PHY protocols - Modulation, coding and channel access - WLAN association, roaming and lifecycle - Frequency bands and RF principles |
| Topic 4: Juniper Mist Location-Based Services | 10% | - Proximity services and analytics - Wi-Fi and vBLE location technologies - User engagement and asset tracking |
| Topic 5: Marvis Virtual Network Assistant | 15% | - Natural language queries and actions - Marvis concepts and capabilities - Proactive and reactive troubleshooting |
| Topic 6: Juniper Mist WLAN Concepts | 20% | - Multi-PSK and advanced policy features - WLAN configuration and security - Wireless intrusion detection and prevention - WxLAN policies and guest services |
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問題 #126
Which two statements correctly describe an extended service set (ESS)? (Choose two.)
答案：B,D
問題 #127
You have deployed location services at a site and have installed an application which includes the Mist SDK on Bluetooth-only mobile client devices. The devices with the SDK-enabled app have Bluetooth enabled, but the devices do not appear in the Mist GUI under Clients/App Clients.
What is causing this problem?
答案：C
解題說明：
If Bluetooth-only mobile client devices with an SDK-enabled app do not appear in the Mist GUI under Clients
/App Clients even though they have Bluetooth enabled, it could be because the AP BLE radios do not hear the SDK-enabled client's BLE beacons.
According to the Mist documentation1, Mist SDK is a software development kit that enables indoor location and proximity services using Mist's virtual Bluetooth LE (vBLE) technology. The SDK allows mobile applications to communicate with Mist APs using BLE beacons that are transmitted by the client devices.
The devices with the SDK-enabled app have Bluetooth enabled, but they do not appear in the Mist GUI under Clients/App Clients because the AP BLE radios do not hear the SDK-enabled client's BLE beacons. This could be due to various factors such as interference, distance, obstacles, or configuration issues that affect the BLE signal strength and quality.
問題 #128
By default, which 6 GHz channels does Juniper Mist radio resource management (RRM) use?
答案：B
解題說明：
In Juniper Networks Mist AI Wireless, Radio Resource Management (RRM) is designed to optimize RF performance automatically while minimizing client impact. With the introduction of Wi-Fi 6E and the 6 GHz band, Juniper Mist follows industry standards and client behavior to ensure efficient and reliable operation. By default, Mist RRM uses the Preferred Scanning Channels (PSCs) in the 6 GHz spectrum.
The 6 GHz band introduces a very large number of available channels, which creates challenges for client discovery, scanning efficiency, and roaming speed. To address this, the IEEE defined Preferred Scanning Channels (PSCs)-a specific subset of 6 GHz channels that access points advertise and clients prioritize during active and passive scanning. These PSCs allow clients to discover networks faster without having to scan the entire 6 GHz channel set.
Juniper Mist RRM automatically selects and operates on these PSCs by default to:
* Improve client discovery and association times
* Reduce unnecessary scanning overhead
* Enhance roaming performance
* Maintain compatibility across a wide range of Wi-Fi 6E client devices Mist continuously evaluates RF conditions using telemetry and AI-driven analysis, but it intentionally limits default operation to PSCs to balance performance, efficiency, and client interoperability. Administrators can override defaults and customize channel plans if required, but PSCs remain the recommended baseline for most deployments.
The incorrect options are explained as follows:
* Option B is incorrect because Mist RRM does not require manual primary channel selection by default.
* Option C refers to 2.4 GHz non-overlapping channels, not 6 GHz.
* Option D represents the full 6 GHz channel range, which is not practical for default scanning or operation due to client limitations.
Therefore, the correct answer is the preferred scanning channels (PSCs), which Juniper Mist RRM uses by default in the 6 GHz band to ensure optimal Wi-Fi 6E performance.
問題 #129
Which real-time location system component takes the coordinates of a tracked device and applies a location- aware triggered action to a client?
答案：B
解題說明：
In the architecture of a Mist AI Real-Time Location System (RTLS), the process of moving from raw signal data to an actionable event involves several distinct layers. To understand why the location system is the correct answer, we must examine how Mist processes Location-Based Services (LBS).
The workflow begins with location sensors (typically Mist Access Points). these sensors collect raw Bluetooth Low Energy (BLE) or Wi-Fi signals (RSS measurements) from tracked assets or mobile devices.
These raw data points are then transmitted to the cloud-based Mist AI engine. The location system (often referred to as the Location Engine within the Mist Cloud) is the specific functional component responsible for calculating the precise X/Y coordinates of the device using machine learning and trilateration algorithms.
However, its role does not end at mere coordinate calculation. The Mist location system is designed to be
"context-aware." Once the coordinates are established, the system maps these coordinates against defined zones, virtual beacons (vBeacons), or geofences configured in the Mist dashboard. When a device's coordinates intersect with a predefined boundary, the location system triggers a location-aware action. This could include sending a webhook to a third-party application, pushing a proximity notification to a mobile SDK client, or recording a "visit" in the analytics engine.
While Juniper Mist Edge handles data plane tunneling and Marvis Minis acts as a digital twin for network simulation, they do not manage the coordinate-to-action logic. The location system is the intelligence that bridges the gap between spatial data and business logic, ensuring that the right client receives the right trigger based on their physical presence within a venue.
問題 #130
You want to set the acceptable minimum RSSI for client devices.
Which WLAN feature is needed to accomplish this task?
答案：D
解題說明：
InJuniper Networks Mist AI Wireless, controlling client connection quality is a critical part of maintaining high Service Level Expectations (SLEs). One of the most effective ways to ensure good user experience is by enforcing aminimum acceptable RSSI (Received Signal Strength Indication)threshold for client devices.
This functionality is implemented usingwireless traffic filteringat the WLAN level.
Wireless traffic filtering allows administrators to defineminimum and maximum RSSI thresholdsthat determine whether a client is permitted to associate or remain connected to an SSID. If a client's RSSI falls below the configured minimum threshold, the AP can deny association requests or deauthenticate the client.
This prevents low-signal or "sticky" clients from connecting at poor signal levels, which would otherwise result in excessive retries, low data rates, increased airtime consumption, and degraded performance for all users.
Mist applies these controls intelligently and surfaces their impact through AI-driven analytics. When low- RSSI clients are filtered, Mist can correlate improvements in throughput, latency, and roaming behavior directly to RF health and client quality metrics. This aligns with Mist best practices, which emphasize proactive client quality enforcement rather than reactive troubleshooting.
The incorrect options are explained as follows:
* WLAN forwardingdetermines how traffic is bridged, tunneled, or NATed and has no impact on RSSI enforcement.
* Geofencingis used for location-based services and RTLS use cases, not RF signal quality control.
* WLAN rate limitrestricts bandwidth usage per client or SSID but does not evaluate or enforce signal strength requirements.
Therefore, the correct feature required to set an acceptable minimum RSSI for client devices iswireless traffic filtering, which directly controls association behavior based on signal quality and helps maintain optimal wireless performance.
問題 #131
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