JN0-252 Practice Exam Questions with Answers Mist AI- Associate (JNCIA-MistAI) Certification

?To troubleshoot a wireless client that is no longer connected to a Mist AP, you would navigate to the "Clients" section within the Mist GUI and select "WIFI Clients."

?This area provides detailed information about all wireless clients that have connected to the Mist APs, including their connection history, performance metrics, and any issues encountered.

?By examining the data available in the WIFI Clients section, network administrators can identify the root cause of connectivity problems and take appropriate actions to resolve them.

?Reference: Juniper Networks documentation on Mist GUI and client troubleshooting procedures.

Wi-Fi Related SLEs in Mist UI:

SLEs (Service Level Expectations) help monitor and ensure Wi-Fi network performance.

Visible SLEs:

Capacity:

B: Capacity SLE monitors the network's ability to handle the number of connected clients and their bandwidth requirements.

Throughput:

D: Throughput SLE measures the data transfer rates, ensuring that the network meets the expected performance levels.

Other Options:

Switch Health: Relates to wired network performance, not Wi-Fi.

Application Health: Generally focuses on application performance, not specifically Wi-Fi.

Conclusion:

The correct answers are B and D.

References:

Mist Documentation on Wi-Fi SLEs: Mist Documentation

To deploy location-based services in Mist, the following components are used:

Location Sensors: These devices capture the location data from BLE tags and other devices.

BLE Tags: These are small devices that emit Bluetooth signals to be picked up by location sensors.

Location Engine: This software processes the data from the sensors and tags to determine precise locations and provide analytics.

References:

Mist Location Services Documentation

Juniper Location Deployment Guide

Cloud-ready Switch: To use the Wired Visibility option in Juniper Mist Wireless Assurance, a cloud-ready switch must be deployed in the network. This ensures that the switch can communicate effectively with the Mist cloud for management and monitoring.

SNMP Protocol Configuration: The Simple Network Management Protocol (SNMP) must be configured on the switch. SNMP enables the monitoring and management of network devices, allowing Mist AI to collect necessary data for visibility and assurance.

References:

Juniper Mist Wired Assurance Overview

Juniper Mist Wired Assurance Configuration Guide

?Understanding Location Determination in Mist:

Mist uses advanced methods to determine the location of clients in an indoor setting.

?Possible Methods:

Triangulation: Uses angles to determine position, but not typically used by Mist.

GPS: Not feasible indoors due to signal limitations.

Probability Surface: Involves calculating the probability of a client's location, but not the primary method used.

Trilateration: Uses the distance from multiple known points to determine the exact location.

?Mist's Method:

Mist primarily uses trilateration to determine the location of clients by measuring the distance from at least three access points.

?To ensure that you receive alerts when a switch interface goes down, you need to enable the Up/Down Port Alerts setting for the specific interface.

?This setting can be configured by navigating to the switch within the Mist UI and modifying the port configuration. Enabling this setting ensures that any changes in the port status, such as going down, will trigger an alert.

?This is critical for proactive network monitoring and to promptly address any connectivity issues.

?Reference: Juniper Networks documentation on configuring port alerts within the Mist UI.

System Platform Components in Mist UI:

Different components provide various insights and information about the network.

Component Descriptions:

Switch Insights: Provides detailed information about switch performance and status.

Events: Logs and displays events occurring in the network but does not specifically highlight missing VLANs.

Marvis Actions: AI-driven insights and recommendations that include identifying and suggesting actions for missing VLANs.

Service-Level Exceptions (SLEs): Monitor and report on performance metrics, not specifically focused on VLAN issues.

Conclusion:

The correct answer is C (Marvis Actions).

References:

Mist Documentation on System Platform Components: Mist Documentation

Real-time Assessment: Juniper Mist's Radio Resource Management (RRM) builds the channel plan based on real-time network assessments. It dynamically adjusts to changing conditions in the RF environment, ensuring optimal performance by continuously monitoring factors such as interference, client distribution, and usage patterns.

Automatic Tuning: RRM tuning happens automatically. Mist AI leverages reinforcement learning to continually optimize RF settings without manual intervention, adjusting channels, power levels, and other parameters in real-time to maintain optimal network performance.

References:

Understanding Radio Resource Management | Juniper Networks

Radio Management | Mist | Juniper Networks

Mist AI uses reinforcement learning in its Radio Resource Management (RRM) service. This approach allows the system to dynamically optimize the performance of the wireless network by adjusting various radio parameters. The RRM service continuously learns and adapts based on network conditions, user behavior, and environmental factors to ensure optimal performance and reliability.

References:

Juniper Mist AI Overview

Mist AI Technology

Time Zone Importance: Setting the correct time zone for a Mist site ensures that all events and logs are timestamped accurately according to the local time of the site. This is crucial for effective monitoring and troubleshooting.

Facilitation of Troubleshooting: By aligning event timestamps with the local time, network administrators can correlate events more easily with specific incidents reported by users, thereby simplifying the troubleshooting process.

References:

Juniper Networks Documentation

Mist Administrative Logins: Mist administrative logins can utilize Single Sign-On (SSO), allowing administrators to log in using their corporate credentials, enhancing security and ease of access.

Guest User Access: Guest user access cannot use SSO, as SSO is intended for internal users and administrators rather than external guest users who access the network.

References:

Mist SSO Configuration Guide

SSO Integration Overview

Types of APs and Security Threats:

Understanding different types of access points and their potential security threats.

Access Point Types:

Neighbor AP: An access point that belongs to a neighboring network and is not necessarily a security threat.

Rogue AP: An unauthorized access point connected to the wired network, posing a significant security threat.

Spoofed AP: An access point that mimics a legitimate one, but typically does not involve being connected to the network.

Honeypot AP: An access point set up to lure attackers, not necessarily a threat unless used maliciously.

Identifying the Threat:

An AP connected to your wired network but not claimed to your organization is considered a rogue AP and poses a security threat.

Conclusion:

The correct answer is B.

References:

Mist Documentation on Access Point Security: Mist Documentation

Identify the Problem: Alerts are being generated and visible in the Mist GUI, but only some administrators receive the alert emails.

Possible Issues:

User email addresses not correctly formatted.

Email server blocking Mist emails.

Insufficient alert subscriptions.

Administrators not enabling email notifications.

Root Cause:

Since some administrators receive the alerts, email formatting and server blocking issues can be ruled out.

If alert subscriptions were insufficient, no administrators would receive the alerts.

The most likely cause is that the affected administrators have not enabled email notifications in their Mist My Account settings.

Resolution:

Ensure that all administrators have enabled email notifications in their Mist My Account settings.

References:

Mist Documentation on Notifications: Mist Documentation

Packet Capture: This feature allows for detailed inspection of traffic at the packet level. Capturing packets can help identify issues with authentication protocols, such as misconfigured settings or failures in the authentication exchange process.

Client Events: Monitoring client events provides insights into the client's authentication attempts, including successes and failures. This data helps in pinpointing where in the process the failure occurs, whether at the client, access point, or authentication server.

References:

Juniper Networks Documentation