JN0-253 Test Engine Version & Exam JN0-253 Simulator Online

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Juniper JN0-253 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Juniper Mist Configuration Basics: This domain addresses initial setup including user accounts, device onboarding, organizational structures, subscription licensing, certificate management, and automated provisioning with labels and policies.
Topic 2
  • Juniper Mist Cloud Operations: This domain covers three API types (RESTful, WebSocket, Webhook) for programmatic integration, plus support resources including ticketing systems and documentation.
Topic 3
  • Juniper Mist Cloud Fundamentals: This domain covers Juniper's cloud-native platform architecture, focusing on AI and machine learning capabilities for intelligent network management and real-world deployment scenarios.
Topic 4
  • Marvis Virtual Network Assistant AI: This domain introduces Marvis, an AI-powered assistant providing automated troubleshooting through intelligent actions, natural language queries, and specialized analytical tools for proactive issue resolution.

Juniper Mist AI, Associate (JNCIA-MistAI) Sample Questions (Q80-Q85):

NEW QUESTION # 80
What is the maximum number of nodes supported in a Mist Edge high availability cluster?

Answer: A

Explanation:
A Mist Edge high availability cluster supports a maximum of two nodes. This allows for redundancy and failover in case one of the nodes goes down.


NEW QUESTION # 81
You are asked to enable Mist management at an existing site with previously configured EX3400 brownfield switches, and to add a new greenfield switch.
Which statement is correct in this scenario?

Answer: D

Explanation:
In the context of Mist management, "brownfield" switches refer to those that are already configured and deployed in a network, while "greenfield" switches are new and have no pre- existing configuration.
Mist supports the integration and management of both brownfield and greenfield switches within the same site. The crucial requirement is that all switches, regardless of their initial state, must be running a version of Junos that is supported by Mist. This compatibility ensures that Mist can apply policies, configurations, and monitoring uniformly across all devices, facilitating a seamless management experience.


NEW QUESTION # 82
In the context of Juniper Mist, which two statements describe a bad user minute? (Choose two.)

Answer: A,C

Explanation:
InJuniper Mist AI, the concept of aBad User Minute (BUM)is a core metric used withinService Level Expectations (SLEs)and theAI-driven analytics engineto quantify negative user experience.
According to theJuniper Mist AI Operations and SLE Analytics Guide, a "bad user minute" is defined as:
"A normalized measure that represents one minute of degraded user experience for one user." Mist AI calculates this by multiplying the number of affected users by the number of minutes they experience poor performance. This allows administrators to understand the impact of network issues not just in duration, but in terms of total user experience degradation.
For example, if ten users experience poor connectivity for one minute, the system records10 bad user minutes
. This normalization helps Juniper Mistprioritize incidents based on impact, rather than duration alone, allowing administrators to focus on issues that affect the greatest number of users.
Therefore:
* Bis correct - it's a way to normalize a user's negative experience.
* Dis correct - it's calculated asnumber of affected users × number of minutes affected.
References:- Juniper Mist AI Operations and Analytics Guide- Juniper Mist Wireless Assurance and SLE Overview- Juniper Mist AI Insight Metrics and KPI Definitions


NEW QUESTION # 83
Which two Juniper devices are used in Juniper Mist WAN Assurance? (Choose two.)

Answer: A,D

Explanation:
Juniper Mist WAN Assuranceis a cloud-based service that extends Mist AI capabilities to the WAN edge, providing visibility, automation, and AI-driven analytics for WAN devices. It focuses on ensuringend-to-end service assurancefor users and applications across distributed networks.
According to theJuniper Mist WAN Assurance and SD-WAN Deployment Guide, the supported devices include:
"Juniper SRX Series Firewalls and Session Smart Routers (SSR) are integrated with Mist WAN Assurance for telemetry collection, service-level monitoring, and AI-driven troubleshooting."
* SRX Series Firewalls (A):Provide secure WAN connectivity and send real-time telemetry (including throughput, latency, and packet loss metrics) to Mist Cloud.
* Session Smart Routers (C):Power the AI-driven SD-WAN solution with application-aware routing and session intelligence, fully integrated into Mist Cloud for advanced visibility and analytics.
EXandQFXswitches are used withWired Assurance, not WAN Assurance.
Therefore, the correct answers areA. SRX Series FirewallsandC. Session Smart Routers.
References:- Juniper Mist WAN Assurance and SD-WAN Deployment Guide- Juniper Mist Cloud Operations and Assurance Documentation- Juniper Mist AI WAN and Telemetry Overview


NEW QUESTION # 84
What are Audit Logs used for in Juniper Mist?

Answer: A

Explanation:
Audit Logs in Juniper Mist are used to view a complete record of logins. The documentation states: "On the Audit Logs page, you can see who logged in to the Juniper Mist portal, when they logged in, and what they did." Audit Logs also record configuration and administrative actions by users on all sites within the organization, enabling administrators to track activity for compliance, troubleshooting, and security. This comprehensive record assists with accountability and change tracking, but they do not manage subscriptions, organization setup, or error logs for all devices. Filtering options allow for activity analysis over selectable time periods, by users, and by site to provide detailed insights into administrative behavior and user access history.
Reference:Juniper Mist Audit Logs | Monitor Administrator Activities | Mist Management


NEW QUESTION # 85
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