[Apr-2026] Exam JN0-253: New Brain Dump Professional - Prep4pass
Free JN0-253 Exam Dumps to Improve Exam Score
NEW QUESTION # 24
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?
- A. You can mix brownfield switches and greenfield switches at the same site, but only if they are running the same version of Junos.
- B. Brownfield switches can be adopted but not managed.
- C. You cannot mix greenfield and brownfield switches at the same site.
- D. You can mix brownfield switches and greenfield switches as long as they are running a Mist- supported version of Junos.
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 # 25
Which Radio Resource Management (RRM) changes are only made once a day between 2:00 AM and 3:00 AM local time?
- A. channel and power settings across a site based on long-term statistics and baselines
- B. channel and power level changes triggered by DFS events
- C. RF template changes to channel width
- D. channel and power level changes triggered by SSID scheduling
Answer: A
Explanation:
Identify the Changes: Radio Resource Management (RRM) changes and their timings.
RRM Changes:
Channel and power settings based on long-term statistics.
RF template changes to channel width.
Changes triggered by SSID scheduling.
Changes triggered by DFS events.
Timing of Changes:
Long-term RRM changes to channel and power settings are typically scheduled once a day to avoid disrupting network performance.
NEW QUESTION # 26
You are creating a new site in the UI.
What are three required configuration settings in this scenario? (Choose three.)
- A. Active Hours
- B. Site Name
- C. Country
- D. RF Template
- E. Location
Answer: B,C,E
Explanation:
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.
Reference:Juniper Mist Configure a Site , Site Configuration Settings Guide , Mist Management Guide
NEW QUESTION # 27
Which two statements are true about switch configurations at the site level? (Choose two.)
- A. Site-level switch configurations override org-level templates.
- B. Switch configurations at the site level are an additional way to apply a switch template to a specific site.
- C. Switch configurations at the site level are required to manually configure individual switches.
- D. Organizational-level templates override site-level switch configurations.
Answer: A,B
Explanation:
In theJuniper Mist Cloud architecture, configuration hierarchy and inheritance are key design principles for managingEX SeriesandQFX Seriesswitches underWired Assurance. Configuration settings can be applied at both theorganization leveland thesite level, with clearly defined precedence rules.
According to theJuniper Mist Wired Assurance Configuration Guide, theorganization leveldefines global configuration templates that apply across multiple sites, while thesite levelprovides customization options specific to a particular location or environment.
The documentation states:
"Site-level configuration overrides any global or organizational template configurations for switches within that site." and further clarifies:
"Administrators can create or modify switch templates at the site level to apply custom settings to specific deployments without affecting other sites under the same organization." Thus:
* Statement Cis correct - site-level configurations are an additional method to apply templates for a specific site.
* Statement Dis correct - site-level configurationstake precedenceover org-level templates.
Statement Ais incorrect because org-level templates donotoverride site-level configurations; the reverse is true.
Statement Bis incorrect because site-level configuration isnot requiredfor manual switch setup-it is an optional, more efficient method of template application.
References:- Juniper Mist Wired Assurance Configuration and Template Management Guide- Juniper Mist Cloud Administration Guide- Juniper Mist Site and Organization Configuration Hierarchy Documentation
NEW QUESTION # 28
You are asked to configure Mist to send e-mail alerts to your organization administrators, who all have mailboxes that reside on the same e-mail server. Alerts are being generated and are visible in the Mist GUI, but only some administrators are receiving the alert e-mails.
What is the problem in this scenario?
- A. Your e-mail server is blocking e-mail from Mist.
- B. The affected administrators have not enabled e-mail notifications in their Mist My Account settings.
- C. The organization does not have sufficient alert subscriptions.
- D. The user e-mail addresses are not correctly formatted.
Answer: B
Explanation:
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.
NEW QUESTION # 29
Which location-based service does User Engagement provide?
- A. asset tracking
- B. ultra wide band location
- C. Wi-Fi presence analytics
- D. wayfinding
Answer: C
NEW QUESTION # 30
In the Latest Updates section of Marvis Actions, an issue might be classified as one of which three states? (Choose three.)
- A. Resolved
- B. Active
- C. Reoccurring Issue
- D. AI Validated
- E. Intermittent Issue
Answer: A,C,D
NEW QUESTION # 31
Which two statements are correct after you request the subscription renewal using e-mail? (Choose two.)
- A. Juniper Mist processes the order and sends an activation code.
- B. Juniper Mist sends a welcome package with promotional materials.
- C. Juniper Mist sends a cancellation notice.
- D. Juniper Mist e-mails the support request for the selected subscriptions.
Answer: A,D
Explanation:
When a customer requests asubscription renewalfor Juniper Mist services via e-mail, the process is handled through a coordinated workflow between theJuniper Mist Cloud licensing systemandJuniper Support. The renewal request ensures that existing service entitlements-such asWireless Assurance,Wired Assurance, WAN Assurance,Marvis AI, orPremium Analytics-continue without interruption.
According to theJuniper Mist Cloud Licensing and Subscription Management Guide, the renewal workflow is described as follows:
"When a renewal request is submitted via e-mail, Juniper Mist support receives and validates the request, initiates processing for the selected subscriptions, and issues a new activation code once the renewal is completed." Here's what happens after the renewal request:
* B.The Juniper Mist systemsends a confirmation e-mailacknowledging the renewal request and routes it tosupport for processing.
* C.Once processed,Juniper Mist generates and delivers an activation codevia e-mail that must be entered into the Mist portal to activate the renewed subscription(s).
Incorrect options:
* A:No promotional materials or physical packages are sent.
* D:A cancellation notice is not sent for renewal requests; it applies only to expired or terminated subscriptions.
Therefore, the correct answers areB. Juniper Mist e-mails the support request for the selected subscriptionsandC. Juniper Mist processes the order and sends an activation code.
References:- Juniper Mist Cloud Licensing and Subscription Management Guide- Juniper Mist Cloud Operations and Renewal Process Documentation- Juniper Mist Organization and Entitlement Activation Overview
NEW QUESTION # 32
What are device-specific WAN Edge templates used for in an SD-WAN configuration?
- A. To monitor network events and stop attacks
- B. To automate the WLAN template process
- C. To automatically generate configuration elements specific to device models
- D. To perform traffic inspection for WAN edge devices
Answer: C
Explanation:
In theJuniper Mist SD-WANsolution,device-specific WAN Edge templatesare used to streamline the deployment and configuration ofJuniper SRX or SSR (Session Smart Router)devices serving as WAN Edge nodes. These templates ensure consistent and accurate configurations across a distributed WAN environment while accounting for differences in hardware models and interface types.
According to theJuniper Mist WAN Assurance and SD-WAN Configuration Guide, device-specific templates:
"Automatically generate configuration elements tailored to the hardware platform, including interfaces, ports, and device capabilities." They are part of Mist'scloud-managed SD-WAN automation framework, which combines WAN Assurance and AI-driven insights to manage branch connectivity. The templates simplify provisioning by populating device-level parameters such as:
* Interface naming and mapping based on the device model.
* Hardware-specific configurations like tunnel endpoints, IP addressing, and routing settings.
* Security and performance policies consistent with the organization's SD-WAN design.
OptionsA,C, andDare incorrect because:
* A(WLAN template automation) pertains to wireless network configuration, not WAN edge devices.
* C(traffic inspection) relates to firewall or security policies handled by SRX's UTM features, not templates.
* D(monitoring and attack prevention) falls under Mist's security or analytics capabilities, not the template function.
Therefore, the correct answer isB. To automatically generate configuration elements specific to device models.
References:- Juniper Mist WAN Assurance and SD-WAN Configuration Guide- Juniper Mist Cloud Device Template Management Documentation- Juniper Mist AI-Driven SD-WAN Deployment Overview
NEW QUESTION # 33
By default, how long does an Installer role have access to a site for initial configuration before expiration?
- A. 24 hours
- B. 48 hours
- C. 7 days
- D. unlimited
Answer: C
NEW QUESTION # 34
Which Mist supported API is considered data-driven?
- A. Webhook
- B. WebSocket
- C. gRPC
- D. RESTful
Answer: D
NEW QUESTION # 35
Exhibit:
Referring to the exhibit, which classifier was the largest contributor to 17% of the capacity issues?
- A. Ethernet
- B. Network Issues
- C. Authorization
- D. Wi-Fi Interference
Answer: D
Explanation:
Within theJuniper Mist Wireless Assurance dashboard, theCapacity SLE (Service Level Expectation) provides visibility into how well the network can handle concurrent users and traffic loads. It identifies the contributing factors, orclassifiers, responsible for degraded capacity performance such asWi-Fi interference, network issues, Ethernet problems, or authorization delays.
According to theJuniper Mist AI Operations and SLE Analytics Guide, the platform:
"Uses classifiers to break down SLE metrics and identify which network factors most heavily contribute to sub-threshold performance." In the exhibit, theWi-Fi interferenceclassifier has the longest bar reaching the full17%, clearly showing it as the largest contributor to capacity degradation. Wi-Fi interference occurs when multiple APs or nearby wireless networks overlap on the same channel, resulting in increased contention, collisions, and reduced airtime availability - all of which impact overall capacity.
Therefore, the correct answer isD. Wi-Fi Interference.
References:- Juniper Mist Wireless Assurance SLE and Classifier Documentation- Juniper Mist AI Operations and Analytics Guide- Juniper Mist Dashboard and Troubleshooting Insights Overview
NEW QUESTION # 36
Which machine learning method uses unlabeled data sets?
- A. Reinforcement learning
- B. Unsupervised learning
- C. Cognitive learning
- D. Supervised learning
Answer: B
Explanation:
InJuniper Mist AI, variousmachine learning (ML)techniques are applied across the platform to analyze network telemetry and improve performance insights. Among these,unsupervised learningplays a critical role in identifying patterns, trends, and anomalies in unlabeled datasets-data that has not been pre-classified or annotated.
According to theJuniper Mist AI and Machine Learning Overview:
"Unsupervised learning enables Mist AI to automatically detect abnormal patterns or clusters in large volumes of unlabeled network data, allowing the system to identify anomalies and optimize network behavior without human labeling." This method allows Mist AI to autonomously recognize deviations in user experience, traffic behavior, or radio performance without prior definitions, helping to enhance predictive analytics and anomaly detection.
By contrast:
* Supervised learningrequires labeled training data.
* Reinforcement learninglearns through trial-and-error feedback loops.
* Cognitive learningis not a formal ML category-it refers to human-inspired reasoning.
Therefore, the correct answer isD. Unsupervised learning.
References:- Juniper Mist AI and Machine Learning Overview- Juniper Mist Cloud Architecture and AI Engine Guide- Juniper Mist Predictive Analytics and Correlation Engine (PACE) Documentation
NEW QUESTION # 37
Which statement describes Marvis Actions?
- A. It is a dashboard that lists the actions taken by wireless users.
- B. It is a dashboard that details actions taken by the Marvis AI.
- C. It is a dashboard that describes user actions.
- D. It is a dashboard that highlights actionable items.
Answer: D
Explanation:
Marvis Actions is a component of the Mist AI platform that provides a dashboard highlighting actionable items. This dashboard is designed to offer insights and recommendations based on the analysis performed by Marvis AI.
The focus of Marvis Actions is to present users with clear, actionable steps that can improve network performance, resolve issues, and enhance the overall user experience. By consolidating relevant information and suggested actions, Marvis Actions helps network administrators efficiently address network challenges and optimize operations.
NEW QUESTION # 38
At which two configuration levels are WLAN objects created? (Choose two.)
- A. org level
- B. user level
- C. device level
- D. site level
Answer: A,D
Explanation:
Site Level: WLAN objects can be created at the site level, allowing specific configurations for different locations within an organization. This helps in customizing WLAN settings based on the unique requirements of each site.
Org Level: WLAN objects can also be created at the organization level, which provides a standardized configuration that can be applied across multiple sites. This ensures consistency in WLAN settings throughout the entire organization.
NEW QUESTION # 39
Which statement is true about Radio Resource Management (RRM)?
- A. The RRM event-driven system automatically runs once a day.
- B. The RRM global optimization system automatically runs every hour.
- C. The RRM global optimization system automatically runs once a day.
- D. The RRM event-driven system automatically runs every hour.
Answer: C
Explanation:
Radio Resource Management (RRM)is a key feature ofJuniper Mist Wireless Assurancethat uses AI- driven automation to dynamically adjust radio settings across access points (APs) for optimal wireless performance. The RRM engine ensures proper channel assignment, transmit power control, and interference management across the network.
According to theJuniper Mist Wireless Assurance and AI-Driven RRM Guide, RRM operates intwo modes:
* Event-Driven RRM:This mode reacts immediately to real-time changes in the RF environment, such as new access points, interference spikes, or client density changes.
* Global Optimization RRM:This process runs as ascheduled, system-wide optimization once per day to evaluate the overall RF environment and redistribute channels and power settings network-wide for the best balance of coverage and capacity.
The documentation states:
"The RRM global optimization algorithm automatically executes once daily to ensure optimal channel and power planning across all APs." Thus, the correct answer isD - The RRM global optimization system automatically runs once a day.
References:- Juniper Mist Wireless Assurance and RRM Configuration Guide- Juniper Mist AI-Driven Radio Resource Optimization Documentation- Juniper Mist Cloud Operations and RF Management Overview
NEW QUESTION # 40
Which two statements describe SLEs? (Choose two.)
- A. SLEs use data science to troubleshoot network issues on an ad hoc basis.
- B. SLEs display a detailed list of Wi-Fi clients who have connected to the network.
- C. The metrics analyzed to meet specific SLE goals are categorized into classifiers.
- D. SLEs use machine learning to provide a proactive approach to understanding the end-user experience.
Answer: C,D
Explanation:
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 of classifiers, which break down performance metrics into measurable, root-cause categories. Examples include DHCP,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.
References:- Juniper Mist Wireless Assurance and SLE Overview- Juniper Mist AI Operations and Analytics Guide- Juniper Mist Cloud Monitoring and SLE Classifier Documentation
NEW QUESTION # 41
Which type of machine learning does Radio Resource Management (RRM) use?
- A. Unsupervised learning
- B. Cognitive learning
- C. Supervised learning
- D. Reinforcement learning
Answer: D
Explanation:
TheAI-driven Radio Resource Management (RRM)system inJuniper Mist Wireless Assuranceemploys reinforcement learningto continuously optimize wireless radio parameters such as channel selection, transmit power, and channel width.
According to theJuniper Mist Wireless Assurance and AI-Driven RRM Guide:
"The RRM system leverages reinforcement learning techniques to dynamically adjust radio configurations based on environmental conditions, user density, and interference patterns." Reinforcement learning enables the Mist AI system to make decisions by continuously evaluating the outcome of past configurations and improving future adjustments. This ensures that Mist RRM can autonomously optimize RF conditions for coverage and capacity without manual intervention.
Therefore, the correct answer isC. Reinforcement learning.
References:- Juniper Mist Wireless Assurance and AI-Driven RRM Guide- Juniper Mist AI and Machine Learning Architecture Documentation- Juniper Mist Cloud Operations and Optimization Overview
NEW QUESTION # 42
What should be specified in the session policy settings?
- A. The implementation of two-factor authentication (2FA).
- B. The types of special characters allowed in the password.
- C. The duration for session timeout and inactivity timeout.
- D. The minimum number of characters required for the password.
Answer: C
Explanation:
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 bothsecurityand efficient 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 under authentication and access policies, not session policies.
Therefore, the correct answer isB. The duration for session timeout and inactivity timeout.
References:- Juniper Mist Cloud Administration and Security Configuration Guide- Juniper Mist Organization Access and Authentication Policy Documentation- Juniper Mist Cloud Operations and Management Overview
NEW QUESTION # 43
You want to change the default language for your Juniper Mist portal.
What will accomplish this task?
- A. Input your primary language in the My Accounts page.
- B. Select your ranked language choice from the Alerts page.
- C. Define your language using Organization templates.
- D. Use the Change Language drop-down list of the Juniper Mist portal.
Answer: D
Explanation:
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.
References:- Juniper Mist Cloud Administration and User Interface Guide- Juniper Mist Cloud Portal User Preferences Documentation- Juniper Mist Cloud Fundamentals and Globalization Overview
NEW QUESTION # 44
Which Juniper device is used in Routing Assurance?
- A. SRX Series Firewalls
- B. MX Series
- C. EX Series Switches
- D. Session Smart Routers
Answer: D
Explanation:
Routing Assuranceis a feature of theJuniper Mist WAN Assurancesolution, providing AI-driven visibility, analytics, and troubleshooting forJuniper Session Smart Routers (SSR)deployed in SD-WAN environments. The system monitors routing performance, link health, and application traffic to ensure reliable WAN connectivity and performance.
According to theJuniper Mist WAN Assurance and Routing Assurance Guide, the feature is described as:
"Routing Assurance provides continuous monitoring of routing operations and path decisions for Juniper Session Smart Routers, offering AI-driven insights into application routing behavior and WAN path health." TheSession Smart Router (SSR)platform-powered by128 Technology(acquired by Juniper Networks)-is specifically designed for AI-driven, session-aware routing. It integrates seamlessly with Mist Cloud to:
* Track routing changes and path selection decisions.
* Correlate application experience with routing behavior.
* Identify and remediate path-related issues automatically through Marvis AI.
Other devices serve different functions:
* MX Series- Carrier-grade routing, not used in Mist Routing Assurance.
* EX Series- Switches used for Wired Assurance.
* SRX Series- Firewalls supporting WAN Assurance and security but not Routing Assurance.
Therefore, the correct answer isC. Session Smart Routers.
References:- Juniper Mist WAN Assurance and Routing Assurance Guide- Juniper Mist Cloud SD-WAN Operations Documentation- Juniper Session Smart Router Technical Overview
NEW QUESTION # 45
Which two statements about WLAN templates are correct? (Choose two.)
- A. They can be deployed to a policy.
- B. They can be deployed to a certain site.
- C. They can be deployed to the whole organization.
- D. They can be deployed to a certain switch.
Answer: B,C
Explanation:
WLAN Templates Overview: WLAN templates in Mist AI are used to standardize and manage wireless configurations across multiple locations and devices. They help in maintaining consistent wireless settings and policies throughout the network.
Deployment to the Whole Organization: WLAN templates can indeed be deployed at the organization level. This allows the configurations defined in the template to be applied across all sites and access points within the organization. This approach simplifies the management and ensures uniformity across the network(Juniper Networks).
Deployment to a Certain Site: WLAN templates can also be applied to specific sites. This is useful for organizations with multiple sites having unique wireless requirements. By applying templates at the site level, administrators can tailor configurations to meet local needs while still maintaining control through central management.
NEW QUESTION # 46
......
Powerful JN0-253 PDF Dumps for JN0-253 Questions: https://passguide.prep4pass.com/JN0-253_exam-braindumps.html
