JN0-253 Mist AI - Associate (JNCIA-MistAI) Questions and Answers

A DHCP lease must be obtained by the switchbefore the ZTP process proceeds. Juniper documentation clarifies: "Ensure that a DHCP server is reachable. In addition to providing an IP address to the switch, your DHCP server must provide the following information: a default gateway, an NTP server, and a DNS server address..." The initial event in the ZTP workflow is the switch receiving a valid IP address via DHCP. Only after obtaining an address can the switch connect to the Mist cloud and proceed with zero-touch provisioning. Other requirements, such as user account, NETCONF, or NTP sync, occur later or are handled automatically via cloud policy after onboarding.

In the Juniper Mist dashboard,Service Level Expectations (SLEs)are metrics that measure user experience in key areas such as connection, throughput, and roaming. Each SLE is composed ofclassifiers, which help identify the underlying cause of degraded performance or sub-threshold scores.

According to the Juniper Mist AI documentation, theRoaming SLEtracks client transitions between access points and evaluates the quality of those roaming events. The contributing classifiers typically includeSignal Quality,Wi-Fi Interference,Ethernet, andCapacity.

In this exhibit, the bar forCapacityis the longest under the “Roaming Classifiers” section, indicating that it has the most significant impact on theSub-ThresholdSLE value (10.6%). This means roaming performance is primarily being limited by insufficient capacity — often due to AP radio congestion or a high number of concurrent clients impacting handoff efficiency.

Hence, theCapacityclassifier is responsible for the sub-threshold SLEs.

In theJuniper Mist WAN AssuranceandSD-WANframework,Forwarding Insightsis the feature responsible for providingapplication forwarding path visibility. It delivers detailed analytics on how application traffic is being routed across the WAN, enabling network administrators to understand and optimize application performance across multiple WAN links or paths.

According to theJuniper Mist WAN Assurance and Insights Documentation,Forwarding Insights:

“Provides visibility into the application forwarding path by showing which WAN link or tunnel is used for a specific flow, including health metrics such as latency, loss, and jitter.”

It integrates withMarvisand theAI-driven WAN Assurance engineto automatically correlate user experience with network transport behavior. Administrators can use Forwarding Insights to:

Identify whichpath (primary, secondary, or backup)an application flow takes.

Viewreal-time performance metricssuch as round-trip delay and packet loss per path.

Understandwhy path selection decisions were made, based on policy or link health.

Other options are incorrect:

A. Router Insightsfocuses on routing and device-level performance, not per-application path details.

B. WAN Edge Insightsprovides device health and site connectivity data, not application-level forwarding analytics.

D. Platform Insightscovers cloud infrastructure performance, not WAN traffic analysis.

Thus, the correct answer isC. Forwarding Insights.

Juniper MistAccess Assuranceis a cloud-based network access control service that provides secure wired and wireless access through identity- and policy-based mechanisms. According to the official Juniper Mist AI documentation, Access Assurance usesuser and device identityto determine network access privileges dynamically.

The service enforces access policies primarily in two ways:

Assigning Specific Roles to Users:Access Assurance dynamically assigns roles to users and devices after successful authentication. These roles are used to apply specific network policies and permissions, defining what level of access or network resources a user or device is allowed. Roles can be leveraged in wireless SSID configurations or switch access policies to ensure consistent enforcement across the infrastructure.

Grouping Users into Network Segments:Access Assurance also allows grouping of users and devices intonetwork segmentsusing VLANs or Group-Based Policy (GBP) technology. This segmentation isolates users or devices into logical groups, ensuring security and optimized traffic handling. Policies are then applied to these groups to control communication between segments, thereby maintaining a zero-trust framework.

Options A and B are incorrect because Access Assurance does not establish VPN tunnels or passively monitor traffic as its primary method of access control. It relies instead onidentity-based role assignment and segmentationto enforce network security.

Among Juniper Mist’sLocation-Based Services,Asset Visibilityprovides the most accurate location tracking capabilities. This is achieved through the use ofvBLE (virtual Bluetooth Low Energy)technology, which leverages a patented16-element BLE antenna arrayintegrated into Mist Access Points forAngle of Arrival (AoA)calculations.

According to theJuniper Mist Location-Based Services Technical Overview:

“Asset Visibility delivers sub-meter location accuracy by using BLE-based triangulation combined with Mist AI’s machine learning algorithms for continuous calibration.”

WhileWi-Fi locationoffers approximate device tracking based on signal strength and triangulation, andProximity Detectionidentifies nearby devices,Asset Visibilityprovides precise real-time tracking of BLE-tagged objects and devices.

User Engagement, on the other hand, focuses on customer-facing mobile interactions, not accuracy optimization.

Therefore, the correct answer isC. Asset Visibility.

InJuniper Mist AI,Service Level Expectations (SLEs)form the foundation ofWireless AssuranceandWired Assurance. They provide adata-driven, proactive methodto measure and maintain the quality of user experience, going beyond traditional device-centric monitoring.

According to theJuniper Mist AI Operations GuideandWireless Assurance Documentation, SLEs:

“Leverage machine learning and data science to deliver a proactive understanding of end-user experience and identify root causes of performance issues.”

Each SLE (such asTime to Connect,Roaming,Throughput,Coverage, andCapacity) is composed ofclassifiers, which break down performance metrics into measurable, root-cause categories. Examples includeDHCP,DNS,Authentication, andSignal Qualityclassifiers.

This classifier-based structure enables Mist AI to automatically correlate problems and highlight the most probable cause of degradation—eliminating the need for manual troubleshooting or reactive analysis.

OptionsBandDare incorrect because SLEs arenot ad hoc toolsfor manual troubleshooting and donot simply list connected clients. Instead, they provide intelligent, AI-driven insights into user experience across the network.

Therefore, the correct statements are:

A. SLEs use machine learning to provide a proactive approach to understanding the end-user experience.

C. The metrics analyzed to meet specific SLE goals are categorized into classifiers.

To view an organization’s Audit Logs in the Juniper Mist UI, the required roles are Network Admin and Super User. According to Juniper Mist documentation: “Network Admin (with All Sites access) and Super User roles grant permission to view and interact with organization-level features, including Audit Logs and Inventory.” The Audit Logs page provides a chronological record of user logins and configuration changes, and access is restricted to authorized users for security and compliance reasons. The "Super User" role has full read/write access for the entire organization—no restrictions—allowing these users to view Audit Logs without limitation. The "Network Admin" role, when granted access to All Sites (not just specific sites), can also view Audit Logs as part of their permitted organization-level operations. Other roles, such as Helpdesk and Installer, have limited or specific access and cannot access Audit Logs. These permissions ensure that only trusted network administrators and super users have the necessary authority for sensitive audit and compliance functions.

With a Marvis VNA subscription, support ticket creation in Juniper Mist is enhanced by in-context AI-assisted troubleshooting and AI-generated responses. According to official Mist documentation, “Marvis subscribers will see AI-generated responses that summarize information from Juniper Mist documentation as they start entering their support query—often surfacing relevant answers right within the support workflow. For many issues, AI-assisted troubleshooting buttons appear on the support form itself, launching guided, context-aware diagnostic flows with Marvis to resolve problems before a ticket is formally created.” These features use natural language processing and contextual data to provide intuitive, AI-driven self-help and troubleshooting, improving the support workflow and often eliminating the need to escalate to human agents or require configuration assistance. Escalation is handled by support, not Marvis VNA; and configuration assistance is a general feature, not specifically added by the Marvis VNA subscription.

You must configure the site within your organization—this is the correct process according to Juniper Mist’s official configuration guides. When setting up a deployment, first an organization is created in the Mist cloud. Within this organization, sites are added for each physical location. The Mist documentation says: "You can create Sites in the Juniper Mist portal from the Organization > Site Configuration menu. Add or update sites as needed." The configuration requires the site name, country, and location to be set at the site level—not the organization level. Claiming APs via QR codes and organization definition are separate steps in device onboarding and initial setup.

To enable Juniper Mist Access Assurance for 802.1X (RADIUS) authentication with Cisco APs, the correct approach is to configure a new 802.1X SSID on the Cisco AP referencing your Juniper Mist Edge as the RADIUS server (option C). According to Juniper Mist’s official documentation and architecture guides: “Mist Access Assurance supports end-client authentication on third-party infrastructure by leveraging the Mist Auth Proxy application running on a Mist Edge platform. Third-party devices, such as Cisco APs, are added as RADIUS clients at Mist Edge. The Mist Edge proxy handles all RADIUS authentication traffic from the APs, wraps these authentication requests into a secure RadSec tunnel, and relays them to the Mist Access Assurance cloud for validation against configured authentication rules.”

This deployment does not require direct RADSEC tunneling from Cisco APs to Mist Access Assurance (since Cisco APs are not natively RADSEC capable) but uses Mist Edge as an intermediary RADIUS server and authentication proxy. "Add an authentication rule in Access Assurance to permit user access," enabling centralized management and policy enforcement in the Mist Cloud.

Marvis Miniscontinuously validates the health of network services by performing synthetic tests at predefined intervals without requiring user intervention. These tests simulate real client interactions — such as authentication, DHCP, DNS, and application reachability — to detect network issues proactively.

According to theJuniper Mist Marvis Minis Technical Overview, the feature performs:

“Automated validations every hour to ensure wireless, wired, and WAN network services are operating as expected.”

Each validation cycle allows the Minis agent (running on Mist Access Points) to verify connectivity and performance parameters across key stages of the client experience. If any issues are detected, they are automatically surfaced in theMarvis Actions dashboardfor further analysis.

While administrators can trigger additional manual tests,automatic validations occur every hourby default across all enabled sites.

Therefore, the correct answer isB. Every hour.

Thesession policy settingsin theJuniper Mist Clouddefine how long a user session remains active and how the system manages session expirations due to inactivity. These configurations help ensure bothsecurityandefficient resource managementacross the Mist Cloud portal and API sessions.

According to theJuniper Mist Cloud Administration and Security Configuration Guide:

“Session policy defines session timeout and inactivity timeout parameters, controlling how long users can remain logged into the Mist Cloud portal or API before re-authentication is required.”

Session Timeout:Specifies the maximum duration a session can remain active, regardless of activity.

Inactivity Timeout:Defines how long a session can remain idle before automatic logout.

These policies help maintain strong access security by reducing the risk of unauthorized access through stale sessions.

Other options such as password complexity (A, C) and two-factor authentication (D) are configured underauthentication and access policies, not session policies.

Therefore, the correct answer isB. The duration for session timeout and inactivity timeout.

The feature that provides deep visibility into BGP operations for MX Series routers is Routing Assurance. According to official Juniper documentation: "Juniper Mist Routing Assurance provides insights about... routing, including routing events, routing protocol states, peer status analysis, routes, and more" for supported routers such as Juniper MX and ACX series. Routing Assurance extends Mist AI observability and analytics into the routing fabric, offering real-time visibility and telemetry for BGP peering session health, routing tables, events, path changes, and other core routing metrics. This empowers network operators with actionable insights and root cause analysis capabilities to maintain optimal WAN and core routing performance from the Mist cloud. Wired Assurance focuses on switch and port health and is not designed for routing protocol visibility.

In theJuniper Mist Cloud, theClient Eventssection within theMonitoringinterface displays detailed event logs for both wired and wireless clients, providing insights into connectivity, authentication, and performance-related activities. Each event entry may include associated diagnostic files such asdynamic packet captures (DPCs),traceroute data, andsyslogsdepending on the event type and device context.

According to theJuniper Mist AI Operations and Client Event Diagnostics Guide, the platform states:

“Wireless client events provide correlation between client connection attempts and associated diagnostic artifacts such as dynamic packet captures. These files are generated automatically during troubleshooting events and are attached to the event log for administrator review.”

From the exhibit, theclient is shown as a wireless device, indicated by theWi-Fi iconand theSSID association informationvisible in the event details. Additionally, the entry confirms that adynamic packet capture (DPC)file was automatically generated for the event, allowing engineers to download and inspect packet-level activity for root-cause analysis.

Therefore:

B (It is a wireless client)is correct — the event pertains to a Wi-Fi-connected device.

C (A dynamic packet capture file is included)is correct — the log includes a downloadable DPC file.

In the Juniper Mist Cloud Portal, theSubscriptionspage provides a summary of all service entitlements associated with an organization, including the number of licensespurchasedandonboardedfor each Mist Cloud service.

According to the official Juniper Mist Cloud Administration Guide, this section displays key fields such asService Name,Purchased,Onboarded,Start Date, andEnd Date. ThePurchasedcolumn indicates the total number of subscriptions bought, while theOnboardedcolumn represents how many of those have been actively assigned and deployed within the organization’s network.

In the exhibit, the entry forMarvis for Wirelessshows103 purchasedand82 onboarded, meaning that while 103 licenses were obtained, only 82 have been claimed and are in use within the system.

Therefore, the correct number ofonboarded Marvis for Wireless subscriptionsis82.

TheJuniper Mist Cloud platformis built on amicroservices-based architecture, where individual software components perform specific functions and communicate using well-definedApplication Programming Interfaces (APIs).

According to theJuniper Mist Cloud Architecture and Operations Guide:

“Microservices communicate through secure APIs, allowing independent services to interact seamlessly while maintaining modularity and isolation.”

This architectural design provides major operational benefits, including:

Independent scalability– each service can scale based on workload demand.

Fault isolation– failures in one service do not affect others.

Continuous deployment– updates can be made to one service without impacting the rest of the platform.

Incorrect options:

B:Juniper Mist microservices are independently updated, not deployed as one suite.

C:They are independent, not dependent on one another.

D:Each microservice maintains its own data model; they do not rely on a single shared database.

Thus, the correct answer isA. Microservices communicate with each other using APIs.

In theJuniper Mist Cloud, theSubscriptionspage provides administrators with detailed information about the status of service licenses and subscriptions associated with devices, sites, and organizations. This includes visibility into the number of active devices, sites, and anyunused subscriptionsacross the organization.

According to theJuniper Mist Cloud Licensing and Subscription Management Guide, the “Sites” section under Subscriptions Summary shows:

“The total number of configured sites within the organization and the number of sites that currently do not have assigned subscriptions.”

In the exhibit, the summary shows:

82 Sitestotal

15 Unusedsites

This indicates that15 sites currently have no active or assigned Marvis for Wireless subscriptions. The “Unused” label under Sites refers specifically to the count of sites not yet utilizing their allocated subscription entitlements.

Therefore, the correct answer isB. 15.

When creating a new site in the Juniper Mist User Interface, the three required configuration settings are Site Name, Country, and Location. According to Juniper Mist's official configuration guides: "At a minimum, enter the name, time zone, and location..." The 'Information' section of site setup requires the Site Name (a descriptive name to identify the site), Country (which sets regulatory and RF domain requirements), and Location (address or geo-coordinates for the site). These form the basis of the site identity in the Mist cloud and are mandatory for dashboard visibility, compliance, and baseline RF configuration. An RF Template, though critical for wireless tuning, is optional and can be assigned post-site creation. Active Hours are not required for the default site setup and are related to scheduling analytics or location-based services, not to the core creation workflow.

The appropriate solution is Juniper Mist Asset Visibility (option C). Asset Visibility is a cloud service that leverages Juniper Mist Access Points and virtual Bluetooth Low Energy (vBLE) technology to track, locate, and display all network devices—including both Juniper and non-Juniper hardware—within the Mist GUI. According to the official Juniper documentation: “Juniper Mist Asset Visibility unites Wi-Fi connectivity, indoor location services for asset tracking, and IoT visibility in a single cloud platform. By combining vBLE with the Mist Cloud, organizations can use the same infrastructure—even when wired switches are from different vendors—for locating, tracking, and analyzing their most valuable assets and network devices.”

This capability is independent of switch manufacturer and provides comprehensive visualization of wireless APs and connected wired devices, ensuring a true single-pane-of-glass management experience. Wired Assurance, Marvis Actions, and LLDP-enabled Wi-Fi Management may provide visibility and proactive troubleshooting, but only Asset Visibility guarantees display and tracking of all assets—Juniper and non-Juniper—in the Mist GUI.

InJuniper Mist Wireless Assurance,Service Level Expectations (SLEs)are key metrics that measure different aspects of the end-user experience. Each SLE focuses on a distinct area of network performance such asConnection,Roaming,Throughput, andCoverage.

TheCoverage SLEspecifically measures whether wireless clients are receiving adequate signal strength (RSSI) and signal quality (SNR) from access points. According to theJuniper Mist AI Operations and SLE Analytics Guide, this metric is defined as:

“The Coverage SLE quantifies the percentage of client sessions that meet the required signal strength and quality thresholds. Low coverage indicates areas with weak or inconsistent RF signal levels.”

When users experienceweak signal or dead zones, theCoverage SLEprovides insight into where and why these issues occur. Mist AI identifies sub-classifiers such asSignal Quality,Wi-Fi Interference, orAirtime Utilization, allowing administrators to isolate the cause of poor signal conditions.

Therefore, in the exhibit shown, an administrator would investigate theCoverage SLE (79%), as it directly relates to signal weakness or RF coverage problems.

In Juniper Mist AI,Wireless Assurance Service Level Expectations (SLEs)are designed to provideAI-driven visibility into user experience and network performance. Each SLE represents a specific aspect of the end-user journey — such asTime to Connect, Throughput, Coverage, Roaming, Capacity, and Application Experience.

According to the Juniper Mist documentation, SLEs “define measurable benchmarks for user experienceand identify where deviations occur.” This allows administrators to quickly determine whether issues stem from client devices, access points, wired uplinks, or WAN connectivity. When an SLE metric falls below its threshold, Mist AI automatically highlights the affected classifier (for example, DHCP, DNS, or Wi-Fi interference) and providesroot-cause correlationthrough AI-driven insights.

This data-driven approach enables administrators totroubleshoot proactivelyby focusing on user-impacting areas instead of raw device statistics. Thus, Wireless Assurance SLEs act asexperience-based benchmarksthat simplify troubleshooting, improve performance visibility, and shorten mean time to repair (MTTR).

Bad cables are identified under the Layer 1 category within Marvis Actions. Juniper Mist’s documentation states: "Use the Actions dashboard to resolve Layer 1 issues. When you click the Layer 1 button on the Action dashboard, all available Layer 1 actions appear. This category currently contains only one action: bad cable." Marvis can detect and alert for bad cables based on frame errors, link statistics, and AP/Switch behavior, all under the Layer 1 category. Connectivity, security, and client issues are handled under their respective action categories, but bad cabling is specifically monitored and detected as a physical (Layer 1) fault.

According to the official Juniper Mist documentation on the configuration hierarchy, the platform uses a three-tier model: Organization → Site → Device. At the organization level, you manage administrator accounts, subscriptions, and organization-wide settings. Then:

“An organization can include one or more sites. A site can represent a physical location or a logical subdivision of your enterprise or campus.”

Also, in the simpler case explanation:

“Each customer is created as a separate organization. Within that organization multiple sites can be created.”

Mist

These statements make clear that the correct relationship is: one organization may have multiple sites under it. The inverse — that a site might contain multiple organizations — is not supported in the documented hierarchy. Therefore option B is correct.

TheJuniper Mist Cloud portalprovides a user-friendly interface that supports multiple languages to enhance accessibility for global users. The language preference determines the display language for menus, dashboards, and configuration pages across the Mist UI.

According to theJuniper Mist Cloud Administration Guide, the portal’s language can be modified as follows:

“Users can change the display language of the Mist portal using the Change Language drop-down list located in the upper-right corner of the interface.”

This option allows users to immediately switch the UI language without affecting other users in the organization or requiring administrative permissions. The change is applied per user profile and is stored for future sessions.

Other listed options are invalid:

A:The Alerts page does not include language settings.

B:The My Account page shows personal info but not display language options.

C:Organization templates are unrelated to UI preferences.

Therefore, the correct answer isD. Use the Change Language drop-down list of the Juniper Mist portal.

Juniper Mist Wireless Assurance revolutionizes network troubleshooting by implementing Predictive Analytics and Correlation Engine (PACE) and dynamic packet capture. According to the official Mist documentation, PACE applies advanced data science and machine learning to analyze real network events and classify them for root-cause identification. The Mist PACE engine proactively identifies issues by correlating over 150 client and AP state changes, enabling the system to surface recommendations and automate root-cause resolution. This allows IT teams to move beyond reactive troubleshooting towards predictive and automated network operations, reducing time-to-resolution and minimizing user impact.

Additionally, dynamic packet capture significantly streamlines troubleshooting efforts. Mist Wireless Assurance automatically detects anomalies or failures in user and network behavior and instantly initiates a packet capture. These packet captures are contextually tagged to the affected event, stored in the cloud, and are readily accessible for analysis. This process eliminates the need for on-site technicians with sniffers, as now every major incident already has an associated packet capture, captured at the right moment. This capability greatly reduces troubleshooting time and ensures that issues can be reproduced and isolated accurately.

In theJuniper Mist Cloud licensing model, subscriptions represent service entitlements that enable specific features such asWireless Assurance,Wired Assurance,WAN Assurance,Marvis Virtual Network Assistant, andPremium Analytics. These subscriptions are managed at theorganization leveland are not permanently tied to individual hardware units.

According to theJuniper Mist Licensing and Subscription Management Guide, subscriptions are:

“Cloud-based entitlements associated with an organization, not bound to specific device serial numbers. Devices draw from the subscription pool dynamically.”

This design allows flexibility and simplifies device replacement or scaling:

When a new device (for example, an access point or switch) is added to the organization, thesubscription is automatically assignedto it from the available pool.

If a device isremoved or fails, the subscription is automaticallyreleased and reassignedto a replacement unit—no manual transfer is required.

Therefore:

Ais correct because subscriptions are not linked to a single device’s serial number.

Dis correct because subscriptions automatically reapply when replacement devices are onboarded.

OptionsBandCare incorrect because Juniper Mist subscriptions are organization-based, not hardware-bound, and require no manual reassignment after device failure or replacement.

Marvis Minis validates network configurations automatically and uses supervised machine learning. As stated in the Juniper Mist AI documentation, “Marvis Minis runs validations automatically at regular intervals and can be triggered manually by administrators. Minis use network digital twin technology and supervised machine learning to simulate and validate real-world user connectivity events.” The system automatically creates patterns, triggers tests, and correlates real user and simulated network behaviors with the learned models. The validation covers critical network services—such as DHCP, DNS, ARP, and application reachability—and does so across various scopes (site, AP, VLAN, and switch). There is no requirement for additional hardware, as the digital twin reuses existing network infrastructure and existing APs.