Pass the Juniper JNCIA-MistAI JN0-253 Questions and answers with CertsForce

Juniper Mist delivers Automatic Feature Updates, Wireless Assurance, and Asset Tracking as core platform features.

Automatic feature updates: As part of its cloud architecture, Juniper Mist provides bi-weekly, hitless automatic updates for features and security, delivered seamlessly from the cloud without service interruption or manual intervention. Mist documentation states, "New features, security patches, and updates are automatically added on a bi-weekly basis without interruptions or service downtime. This dramatically simplifies and improves service operations for network IT administrators."

Wireless Assurance: Wireless Assurance is Mist’s flagship cloud service that leverages AI and machine learning to automate wireless network operations, delivering predictable, reliable, and measurable Wi-Fi experiences. It provides deep visibility into client states, sets service level expectations (SLEs), and uses Marvis actions and AI-driven recommendations to ensure root-cause identification and proactive troubleshooting—"Mist Wi-Fi Assurance is a cloud service based on machine learning (ML) and driven by Mist AI... designed for the smart device era."

Asset tracking: Asset Visibility/Tracking uses vBLE technology and Wi-Fi to track and locate assets and IoT devices within an organization, integrating with Juniper Mist Cloud for real-time and historical analytics. According to the Asset Visibility datasheet: "Mist Asset Visibility is a cloud service that enables real-time tracking and historical location analytics of people, assets, and IoT devices."

Controller firmware updates and perpetual AP licenses are not listed features of the Mist cloud architecture; Mist uses a cloud-based control plane and subscription-based licensing for its platform.

Juniper Mist Insights in the dashboard provides a high-level view of the network experience across an entire site or device types. According to the official Juniper Mist documentation: "The Mist Insights page provides a quick overview into your clients' network experience for anywhere in the stack, be it Wireless, Wired, or WAN networks. Insights gives an overview of network experience across the entire site, access points, or client devices." This feature enables administrators to analyze overall connection status, traffic patterns, latency, and trends at multiple context levels—for the whole site, for specific devices, or for client segments. This holistic overview helps identify patterns and assess the health of network operations, empowering proactive management and troubleshooting. Review periods can range from minutes to days, depending on the dashboard section and the organization's licensing.

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.

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.

Comprehensive and Detailed Explanation verified by Juniper Mist documentation:

To ensure a guest WLAN is available only on a specific lobby AP, the correct approach according to Juniper Mist best practices is to create a new "Guest" WLAN template and add it to the lobby AP using a device profile. This method leverages device profiles for targeted SSID airtime availability, allowing granular WLAN assignment to selected APs (not all APs or sites). Juniper's documentation and solution briefs confirm that device profiles control which SSIDs broadcast on specific access points within a site, supporting scenarios like dedicated guest access only in particular areas such as the lobby.

Creating WLANs in standard templates enables SSID broadcast across all assigned APs, not selectively per device. Organization labels do not restrict SSID broadcast for individual APs.

Verification:

Your selected answer in the image ("Create a new 'Guest' WLAN template and add it to the lobby AP using a device profile") is correct and aligns with Juniper's recommended workflow.

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In theJuniper Mist Cloud architecture, aWLAN templateis used to define wireless network parameters, including SSIDs, authentication methods, and access control settings. These templates allow administrators to apply consistent Wi-Fi configurations across multiple access points and sites.

According to theJuniper Mist Wireless Assurance Configuration Guide, the WLAN template:

“Defines the configuration for SSIDs, including security mode (WPA2, WPA3, 802.1X), authentication servers, VLAN assignment, and user access policies.”

To configureWPA3/Enterprise (802.1X)security for employee SSIDs, administrators must create or edit a WLAN template and selectWPA3-Enterpriseas the security type. The template can then be associated with all sites in the organization, ensuring uniform deployment.

Other template types serve different purposes:

Switch template:Used for wired configuration and port profiles.

WAN Edge template:Used for SD-WAN and WAN Assurance configurations.

RF template:Used to manage radio parameters such as channel, power, and band.

Therefore, the correct answer isC. WLAN template.

The three valid methods for requesting authentication with the Juniper Mist API are:

Use an HTTPS login with a user name and password: The Mist API accepts HTTPS requests where credentials are provided directly for session/token generation and user administration.

Use OAuth2 linked to an OAuth provider: "Juniper Mist APIs offer authentication via OAuth2 with various OAuth-compatible identity providers, such as Okta, for secure and federated access."

Enable basic authentication with a token: Mist APIs accept programmatic requests using tokens (API tokens or bearer tokens) for automation, scripting, and integration—each token mapping to specific scopes and user permissions.

Enabling MFA with Okta Verify enhances user portal security but is not an API authentication mechanism. RADIUS certificates are used for infrastructure 802.1X authentication, not for API access.

InJuniper Mist Cloud, guest access is managed through theGuest Portalfeature, which allows administrators to configure secure and flexible authentication methods for temporary or visitor access. These options are designed to provide a balance between user convenience and network security.

According to theJuniper Mist Guest Access and Captive Portal Configuration Guide, the supported authentication options include:

“Authentication Code (Self-registration) and Sponsored Guest workflows, among others, which provide different levels of administrative control and ease of use.”

Authentication Code (A):Visitors receive a temporary authentication code (PIN) via email or SMS that they use to log in. This method is ideal for self-service access while maintaining accountability.

Sponsored Guest (C):In this mode, guests must be approved by a designated employee or sponsor before gaining access. This adds an extra layer of security by involving internal personnel validation.

MAC Authentication (B)andSAML (D)are not used for guest portals; they are designed for device-based authentication and enterprise-level identity federation, respectively.

ThePredictive Analytics and Correlation Engine (PACE)is thecore AI and data analytics componentof the Juniper Mist Cloud architecture. It collects, processes, and correlates telemetry data across all managed domains —Wireless, Wired, and WAN Assurance— to deliver proactive insights and predictive network intelligence.

According to theJuniper Mist AI Operations and Architecture Guide:

“The Predictive Analytics and Correlation Engine (PACE) serves as the foundation of Mist AI, using continuous telemetry ingestion and machine learning algorithms to understand, correlate, and predict network behaviors across the wireless, wired, and WAN environments.”

PACE enables Mist AI to:

Detect anomalies in user experience and device performance.

Predict failures before they affect users.

Correlate events across network domains for root-cause analysis.

Therefore, the correct answer isA. Predictive Analytics and Correlation Engine (PACE).

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).