Juniper JN0-452 Dumps

Two correct statements about Juniper Mist Dynamic Packet Capture are that no configuration is necessary for Mist’s Dynamic Packet Capture and it is automatically attached to a client event displayed on the Insights page. So the correct answers are A. No configuration is necessary for Mist’s Dynamic Packet Capture and B. It is automatically attached to a client event displayed on the Insights page.

In Juniper Networks Mist AI Wireless, Service Level Expectations (SLEs) are used to measure and assure real user experience across the wireless network. Each SLE is built on specific classifiers, which break down failures into root causes such as DHCP, DNS, authentication, RF conditions, or application issues. Understanding which SLEs rely on DHCP classification is essential for accurate troubleshooting.

The two Wireless Assurance SLEs that include a DHCP classifier are Successful Connects and Time to Connect.

The Successful Connects SLE measures whether client devices are able to complete the full connection process successfully. This process includes association, authentication, and critically, DHCP address assignment. If a client fails to obtain an IP address, the connection is considered unsuccessful, and the failure is explicitly classified as a DHCP issue within this SLE.

The Time to Connect SLE measures how long it takes for a client to connect from the moment it initiates association until it is fully usable on the network. One of the key components of this timeline is the DHCP transaction time. Slow DHCP responses, retransmissions, or server delays directly increase the overall connection time, and Mist classifies these delays under DHCP within the Time to Connect SLE.

The other options are incorrect for the following reasons:

Roaming SLE focuses on re-association, authentication, and mobility events, not DHCP, since IP addressing is typically retained during roaming.

Coverage SLE evaluates RF signal strength, SNR, and cell overlap, with no dependency on DHCP.

Throughput SLE measures data transfer performance after connectivity is established and does not analyze DHCP behavior.

Therefore, the correct answer is Successful Connects and Time to Connect, as both SLEs directly depend on and classify DHCP-related performance and failures within Mist Wireless Assurance.

The Clone Site feature in the Juniper Mist dashboard is a powerful tool designed to streamline the deployment of new physical locations by duplicating the environmental and operational logic of an existing "gold standard" site. However, to avoid configuration conflicts (such as duplicate addresses) and to maintain the integrity of the hierarchy, Mist is selective about which objects are carried over during the cloning process.

According to Juniper Mist documentation, only the settings visible on the Site Configuration page are copied to the new site. This specifically includes:

Auto Firmware Upgrade settings (A): The specific versioning (Production vs. RC) and the weekly or daily maintenance windows defined for the site are preserved. This ensures that the new site follows the same lifecycle management policy as the primary site.

RF Templates (B): The radio resource management (RRM) profile assigned to the site is copied. This includes channel planning, bandwidth settings (20/40/80 MHz), and power level constraints tailored for that environment.

Other Site-Level Settings: This also includes Webhooks, Rogue/Honeypot AP detection rules, and Location Services settings.

Conversely, certain objects are explicitly not copied. The Site Location (C) and Site Name are excluded because each site must be geographically unique for accurate mapping and time zone calculation. WLANs (D) are also not copied through the Clone Site function; SSIDs are typically managed at the Organization level via WLAN Templates, which are then mapped to sites or site groups rather than being "hardcoded" into an individual site's local configuration. By cloning the site-specific parameters like RF templates and upgrade schedules, Mist allows administrators to rapidly scale their infrastructure while ensuring the core network access (WLANs) is maintained through the overarching organizational policy.

According to the Webhooks - Mist document, two types of information that would be streamed through webhooks are:

Alerts, which are notifications that are triggered by certain events or conditions on the network.

SLE metrics of clients, which are service level expectations that measure the quality of experience for clients on various aspects such as connection, coverage, capacity, throughput, and roaming.

According to the Virtual Network Assistant | Juniper Networks US document2, Time to Connect is a Wireless Assurance SLE that has classifiers of Association, Authorization, DHCP, and Internet Services. This SLE measures how long it takes for a client device to connect to the network and access internet services.

Mist Radio Resource Management (RRM) performs several functions including transmit power control and channel assignment which help optimize wireless network performance by dynamically adjusting radio settings based on changing environmental conditions.So,the correct answers are A.transmit power control and C.channel assignment

According to the Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide1, two functions of Mist Radio Resource Management (RRM) are:

Transmit power control, which adjusts the transmit power of APs based on their coverage area and interference level.

Channel assignment, which assigns channels to APs based on their location and interference level.

The AI VALIDATED status update means that the issue was opened and Marvis confirms it has been closed.

According to the Marvis Virtual Network Assistant Datasheet1, the AI-VALIDATED status update means that the issue was opened and Marvis confirms it has been closed. This status indicates that Marvis has verified that the issue is no longer present and the root cause has been resolved.

Within the Juniper Mist AI ecosystem, telemetry data and network activities are organized into distinct categories to facilitate efficient troubleshooting and monitoring. While "Organization" (A) represents a management hierarchy and "Security" (C) is a functional domain (such as Rogue AP detection or WxLAN policies), Mist specifically filters operational events into three primary categories: Site, AP (Access Point), and Client. These categories are reflected across the Mist dashboard, particularly within the Insights and Monitor views.

Site Events (E) represent macro-level issues that affect the entire physical location or a significant portion of the network infrastructure. Examples include DHCP server unreachable errors, DNS latency spikes, or site-wide configuration changes. These events are crucial for identifying systemic problems that originate from the wired side of the network or the local environment rather than individual wireless devices.

AP Events (B) focus on the health and status of the hardware itself. This category includes events such as AP reboots, firmware upgrades, Ethernet link toggling (up/down), and radio failures. By filtering for AP-specific events, administrators can quickly determine if a connectivity issue is localized to a specific hardware unit or a PoE power supply problem.

Client Events (D) provide the most granular level of visibility, tracking the specific journey of an end-user device. This includes the entire 802.11 state machine: association, authentication, and DHCP handshake. Client events are further classified as "Good," "Bad," or "Neutral," allowing Marvis AI to correlate failures (like an incorrect PSK or a slow DHCP response) to a specific user session. This three-tiered event structure—Site, AP, and Client—is the foundation of Mist's AI-driven root cause analysis, enabling the system to pinpoint exactly where in the stack a failure occurred.

As part of the Throughput SLE in the Mist UI, the Coverage classifier indicates the signal strength of the client.

In the Juniper Mist dashboard, managing licenses is handled through the Subscriptions page at the Organization level. This page is critical for ensuring that all deployed hardware (Access Points, Switches, and Gateways) has the necessary cloud services—such as Wi-Fi Assurance, Wired Assurance, or Marvis VNA—to function correctly. The subscription page provides a real-time overview of the organization's licensing health using specific status indicators.

The status Active (D) indicates that the subscription is currently within its valid date range and is being utilized by the hardware in the organization. When a subscription is marked as Active, it means the features associated with that license are fully operational, and the Mist Cloud is actively processing telemetry from the associated devices. This is the primary state for all correctly provisioned licenses.

The status Exceed (B) (often displayed as "Exceeded") is a unique and important state in the Mist ecosystem. Unlike many legacy controllers that might shut down services if a license count is surpassed, Mist uses an "honor-based" system combined with clear visual alerting. The Exceed status appears when the number of physical devices claimed and assigned to a site exceeds the total number of available license seats for a specific service. For example, if an organization has 100 "Wi-Fi Assurance" subscription seats but has deployed 110 Access Points, the status will show as Exceeded.

Mist provides a grace period and persistent notifications to administrators to rectify this by either purchasing more subscriptions or removing excess devices. It is important to note that while terms like "Valid" or "Demo" might be used in general conversation, the specific operational statuses tracked in the subscription table to manage license compliance and expiration are Active, Exceeded, and Expired. These statuses allow IT teams to proactively manage their operational expenditures and ensure uninterrupted service for their wireless users.

In the Juniper Mist AI ecosystem, Zone Analytics is the specific real-time location service component designed to provide deep business intelligence regarding how users and devices interact with a physical space. While the Mist platform offers various location services—such as Wayfinding for turn-by-turn navigation and Asset Tracking for locating specific tagged equipment—Zone Analytics focuses on the aggregate behavior of clients within defined boundaries on a floor plan.

Zone Analytics allows administrators to define virtual areas, known as zones, on their facility maps. The Mist Location Engine then uses its patented virtual Bluetooth Low Energy (vBLE) antenna array and machine learning algorithms to track the presence of mobile devices (via the Mist SDK) and Wi-Fi clients within these zones. This service calculates two primary metrics required by the scenario:

Dwell Time: This measures the duration a specific client remains within a defined zone. Administrators can set minimum and maximum dwell thresholds to categorize visitors (e.g., "passersby" vs. "engaged customers").

Movement Patterns: By analyzing transitions between different zones, the service generates "motion flows" or "visitor journey" maps. This helps organizations identify common paths taken through a building, popular entry/exit points, and areas of high congestion.

These insights are typically presented through the Engagement Analytics or Premium Analytics dashboards. For example, a retailer might use Zone Analytics to determine if a new product display is successfully increasing the "dwell time" of shoppers in a specific aisle, or an office manager might use it to optimize "workflow" by seeing how employees move between different departments. By leveraging these real-time data sets, businesses can make informed decisions about staffing, floor layouts, and resource allocation based on actual user behavior patterns.

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According to the JNCIS-MistAI Certification page3, a Marvis Actions Missing VLAN notification indicates that an access point is missing a VLAN that is configured on other access points in the same site.

In the Juniper Mist architecture, the location system (often referred to as the Mist Location Engine) is the centralized intelligence residing in the cloud that transforms raw RF data into actionable business intelligence. While hardware components like location sensors (Access Points) collect raw signal strength (RSSI) from BLE tags or mobile devices, they do not possess the logic to understand the spatial context or provide data to external applications.

The location system performs the heavy lifting by taking the telemetry gathered from the vBLE antenna arrays on the APs and applying sophisticated machine learning algorithms.1 It calculates the precise X/Y coordinates of a device on a floor plan. However, the true value of the location system—as highlighted in this scenario—is its ability to correlate these coordinates with the venue's metadata, such as defined zones, virtual beacons, and map scales.

Once the location system has determined where a device is relative to the environment, it translates that physical presence into "usable data." This is primarily achieved through the Mist API and Webhooks. For example, when a tracked device enters a specific "Retail Zone," the location system generates an event that an external CRM application can ingest to push a personalized coupon to a customer. Similarly, in healthcare, the location system correlates a nurse's coordinates with a patient room to automatically log a visit in an Electronic Health Record (EHR) system.

By acting as the middleware between the wireless infrastructure and third-party software, the location system ensures that raw coordinates become meaningful data points—such as dwell times, zone entries, or asset movements—that drive automation and enhance user experiences across various industry verticals.

In this scenario, you would begin troubleshooting by checking the WLAN-level Pre-Shared Keys.

According to the Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide1, you can configure a time-based setting for WLAN-level Pre-Shared Keys (PSKs) that will reset the key after a specified interval. This feature is useful for enhancing security and preventing unauthorized access. If a user reports that the Wi-Fi worked for a week and now it does not work, you should check the WLAN-level PSK settings and see if the key has been changed.

According to the exhibit, the WLAN has a minimum basic rate of 24 Mbps for both 2.4 GHz and 5 GHz bands. This corresponds to the high-density data rate setting in Mist, which disables all data rates below 24 Mbps. This setting is recommended for high density designs, where clients have enough signal strength and quality to operate at higher rates.

According to the Lecture 3 - Radio Frequency and Antenna Fundamentals - Part 2 document3, two layers that are different between Ethernet and Wi-Fi in the OSI networking model are:

Media access control (MAC) sub-layer, which is part of the data link layer and defines how devices access and share the wireless medium.

Physical layer, which defines how data is encoded and transmitted over the wireless medium.

According to the Mist documentation1, a Mist AP will pull a management IP address from the Native VLAN by default. However, if the Local Status Page is configured for the Site, all the site APs will pull their own IP address from the Management VLAN, but also addresses for each of the VLANs configured on the AP. This is because each AP creates a Switch Virtual Interface (SVI) for each VLAN on its eth0 interface.

The Local Status Page is a feature that allows you to access information about an AP’s status and configuration through a web browser by connecting to its IP address2. This feature can be enabled or disabled at the site level under Site Settings > Access Points > Advanced Settings.

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.

In Juniper Networks Mist AI Wireless, access points discover upstream switch and port information using Link Layer Discovery Protocol (LLDP). LLDP is an IEEE-standard, vendor-neutral Layer 2 discovery protocol designed specifically to allow network devices to advertise and learn information about directly connected neighbors.

When a Juniper Mist AP connects to a wired switch, it uses LLDP to exchange information such as:

Switch hostname and chassis ID

Switch port identifier

VLAN details

Power over Ethernet (PoE) capabilities and power allocation

This information is critical for Mist operations and visibility. It enables the Mist cloud to accurately display AP-to-switch mappings, identify the exact switch port an AP is connected to, validate PoE delivery, and assist with troubleshooting wired-side issues that impact wireless performance. LLDP data is also leveraged by Mist AI and Marvis to correlate wired and wireless events, improving root-cause analysis.

The other options are incorrect for the following reasons:

CDP (Cisco Discovery Protocol) is a Cisco-proprietary protocol and is not used by Juniper Mist APs for switch discovery.

ARP (Address Resolution Protocol) resolves IP addresses to MAC addresses and does not provide device or port identity information.

SNMP is a management and monitoring protocol used by controllers or management systems, not by APs for neighbor discovery.

Because LLDP is standards-based, lightweight, and designed for neighbor discovery, it is the correct and supported protocol used by Juniper Mist APs to learn switch information.

Therefore, the correct answer is D. LLDP.

According to the Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide1, a config template is a configuration object that can be used to apply consistent WxLAN and WLAN policies across all sites within the same organization. A config template can be applied to a site group, which is a collection of sites that share common attributes.

In the IEEE 802.1X authentication process, the AP acts as an authenticator.

According to the Lecture 5 - Security - Part 1 document, the AP’s role in the IEEE 802.1X authentication process is to act as an authenticator. This means that the AP acts as a gatekeeper between the client device (supplicant) and the RADIUS server (authentication server). The AP forwards authentication messages between the supplicant and the server and grants or denies network access based on the server’s response.

In Juniper Networks Mist AI Wireless, dynamic packet capture (dPCAP) is tightly integrated with events to enable rapid, context-aware troubleshooting. When Mist detects a systemic issue—such as a DHCP server becoming unresponsive—it automatically generates a site-level event because the problem impacts multiple devices within a site rather than a single client.

As shown in the exhibit, the event “DHCP is Unresponsive” lists multiple impacted devices and includes a timeline of contributing network events. This classification is critical: DHCP infrastructure failures are treated as site events, not client-specific or organization-wide events. When such a site event is triggered, Mist can automatically perform a dynamic packet capture on the relevant access points to capture DHCP Discover, Offer, Request, and Acknowledgment (DORA) traffic in real time.

To access this packet capture, an administrator must:

Navigate to the impacted site identified in the event.

Open the corresponding site event (in this case, the DHCP unresponsive event).

Download the automatically generated packet capture file, which can then be opened in Wireshark for detailed protocol-level analysis.

The incorrect options are explained as follows:

Organization events provide high-level visibility and auditing but do not host packet captures.

Client events are used when a single client experiences issues; they are not appropriate when multiple devices are impacted by a shared service failure.

Verifying an impacted client does not expose the dynamic packet capture tied to a site-wide DHCP issue.

Therefore, the correct method is to verify the impacted site and use the corresponding site event to fetch the automatically generated packet capture, making Option B the correct answer.

Once a client discovers an access point, the correct order of steps for successful 802.1X authentication is Open System Authentication -> Association -> 802.1X Authentication. So the correct answer is D.Open System Authentication -> Association -> 802.1X Authentication.

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.1 The key to understanding this specific range lies in the 802.11 CSMA/CA mechanism, specifically the Clear 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 the Signal 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 dBm range.

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's Radio Resource Management (RRM) and the Capacity SLE specifically 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.

In a traditional deployment, a Juniper Mist Access Point is a "cloud-first" device, meaning it expects a constant connection to the Mist Cloud to receive configuration updates and report telemetry. When performing an "AP-on-a-Stick" (APoS) site survey, the AP is often powered by a battery pack and moved to various locations where an active Ethernet backhaul or Internet connection is unavailable.3 To ensure the AP continues to broadcast the required SSIDs for signal measurement in this "disconnected" state, two specific settings must be adjusted within the Mist dashboard.

First, AP Config Persistence must be enabled. By default, Mist APs store their configuration in volatile memory; if an AP reboots (which happens when switching battery packs or moving locations) and cannot reach the Mist Cloud, it may fail to reload its previous configuration. Enabling Config Persistence ensures that the AP writes its current configuration to non-volatile flash memory, allowing it to boot up and start broadcasting the programmed SSIDs even in the absence of a cloud connection.4

Second, AP Uplink Monitoring must be disabled. Mist APs are designed with a safety mechanism where, if the AP loses its gateway connectivity (eth0 link or ping to the gateway), it will stop broadcasting SSIDs to prevent "black-holing" client traffic. In a site survey scenario, the Ethernet port is typically connected only to a battery or a passive PoE injector with no data path.5 If Uplink Monitoring remains active, the AP will detect the lack of a backhaul and disable its radios, making the survey impossible. By disabling this feature, the AP is forced to keep its radios active regardless of the uplink status. Together, these two settings allow the AP to function as a standalone signal source, which is essential for accurate RF environment mapping and pre-deployment validation using Mist AI hardware.

Basic data rates are the required data rates that all devices on a wireless network must support in order to connect to the network. These rates are used for management and control frames and can affect the performance of the network.

According to the Lecture 3 - Radio Frequency and Antenna Fundamentals - Part 2 document2, basic data rates are required data rates that all devices must support to communicate on a WLAN.

According to the Location - how it works - Mist document1, a Mist AP actually begins transmitting BLE when it is placed on a floor plan. This is because the Mist cloud uses the floor plan information to calculate the optimal BLE transmission pattern for each AP.

In the Juniper Mist dashboard, the Marvis Actions page serves as a centralized "proactive inbox" that identifies critical issues across the organization. However, the depth of information and the ability to interact with these findings are strictly tied to the Marvis Virtual Network Assistant (VNA) subscription.

The Mist dashboard provides a basic level of visibility even without a full Marvis license, allowing administrators to see that certain high-level categories (such as AP, Switch, or Gateway) have identified issues. This is designed to demonstrate the value of the AI engine. However, when you see a lock symbol next to sub-categories or specific Marvis Actions, it indicates that the organizational account does not have an active Marvis VNA subscription for those specific devices.

Without the subscription, the system will not permit the user to "drill down" into the root cause analysis, view historical event timelines, or access the specific remediation steps suggested by the AI. For example, while a standard Wi-Fi Assurance license might show that an AP is offline, the Marvis VNA subscription is what enables the detailed investigation—such as determining if the offline status is due to a cable failure, a bad PoE port on a switch, or a firmware mismatch.

To unlock these features and remove the lock symbols, a SUB-VNA (Virtual Network Assistant) subscription must be applied to the access points in the site. Once licensed, Marvis can provide full "conversational AI" capabilities, allowing you to ask natural language questions about the APs and giving you the interactive tools needed to resolve the issues identified in the Actions dashboard. Therefore, the presence of the lock icon is a direct indicator of a missing or expired subscription tier required for advanced AI-driven troubleshooting.

According to the Initial AP Connection and VLANs & Static IP addresses - Mist document1, when a Juniper Mist AP boots up for the first time, it will expect to see a trunked port or the native VLAN=1 and will send a DHCP request on that VLAN. The AP will attempt to connect to the Mist cloud using port 443, which is the default HTTPS port.