2026 Realistic ActualPDF JN0-253 Dumps PDF - 100% Passing Guarantee
Free Juniper JN0-253 Exam Questions and Answer
Juniper JN0-253 Exam Syllabus Topics:
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NEW QUESTION # 54
You want to determine where you have coverage issues in your network using Marvis Actions.
Which Marvis Action category should you use in this situation?
- A. Connectivity
- B. Clients
- C. AP
- D. Application
Answer: C
NEW QUESTION # 55
A user has reported a network outage. After locating the user, you find that the switch interface facing the user is down but there is no alert in the Mist UI. You want to ensure that in the future, you receive an alert when a switch interface is down. You have already verified that the Critical Switch Port Down alarm is configured and enabled on the Alerts Configuration page.
In this scenario, which action in the Mist UI will satisfy the requirement?
- A. Disable the Critical Switch Port Down alarm on the Alerts Configuration page.
- B. Navigate to the switch in the Mist UI and modify the Port Profile configuration to enable Persistent (Sticky) MAC Learning for the Port Profile.
- C. Enable the Critical Switch Port Up alarm on the Alerts Configuration page.
- D. Navigate to the switch in the Mist UI and modify the Port Configuration to enable the Up/Down Port Alerts setting for the interface.
Answer: D
Explanation:
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.
NEW QUESTION # 56
Which unit of measurement is used for capacity, coverage, and throughput SLEs?
- A. signal strength in dBm
- B. throughput in Mbps
- C. percentage of user minutes
- D. percentage of channel utilization
Answer: B
Explanation:
For capacity, coverage, and throughput Service Level Expectations (SLEs) in Mist AI, throughput is measured in Mbps. This unit measures the rate at which data is successfully delivered over the wireless network, providing a clear indication of network performance and user experience. Mist AI tracks these metrics to ensure the network meets the required performance standards.
NEW QUESTION # 57
Which two Juniper devices are used in Juniper Mist WAN Assurance? (Choose two.)
- A. QFX Series Switches
- B. SRX Series Firewalls
- C. Session Smart Routers
- D. EX Series Switches
Answer: B,C
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 # 58
Which parameter is beyond the scope of the Connectivity category when troubleshooting with Marvis Actions?
- A. authentication failure
- B. DNS failure
- C. duplex mismatch
- D. DHCP failure
Answer: C
Explanation:
The duplex mismatch parameter is beyond the scope of Marvis Actions' Connectivity category. According to the official Juniper Mist documentation, Marvis Actions within the Connectivity category are designed to troubleshoot common network connectivity issues for wireless clients, including DHCP failure, DNS failure, authentication failure, and ARP failure. These actions automatically detect and provide detailed insights about failures most likely to impact client onboarding, IP addressing, and network services. Duplex mismatch, on the other hand, is a wired networking issue where there is a disagreement between network devices (such as switches and end hosts) regarding duplex settings (half-duplex or full-duplex), and it typically causes performance problems like collisions and slow speeds. Marvis's focus for the Connectivity troubleshooting category is wireless protocol-level connectivity and service reachability, so duplex mismatch falls outside its direct scope of detection and automatic remediation.
Reference:Juniper Mist Documentation - Troubleshooting Connectivity Issues with Marvis; Connectivity Actions Overview
NEW QUESTION # 59
What are two important components monitored under WAN Edge Health SLEs? (Choose two.)
- A. application response times
- B. memory utilization
- C. ISP reachability
- D. CPU utilization
Answer: B,D
Explanation:
The WAN Edge Health SLE in Juniper Mist monitors critical operational metrics for WAN edge devices.
According to Juniper's documentation: "Juniper Mist analyzes various factors that affect WAN edge health and assigns a score... Classifiers include Memory-triggered when WAN edge memory utilization is above
80 percent and CPU-triggered when control or data plane CPU utilization is above 90 percent." These components directly impact the device's ability to process traffic. Monitoring these parameters enables rapid detection of system resource constraints, which are essential for ensuring optimal WAN performance. While ISP reachability is a separate SLE (usually part of WAN Link SLEs), application response times are tracked in Application SLEs.
Reference:WAN Edge Health SLE | Mist , Juniper Mist Network Monitoring , WAN Assurance | NetworkScreen.com.au
NEW QUESTION # 60
What is used in Wireless Assurance to evaluate information about possible network faults?
- A. syslog analysis
- B. SNMP
- C. tcpdump
- D. machine learning
Answer: D
Explanation:
Machine Learning in Wireless Assurance: Mist's Wireless Assurance uses machine learning to analyze telemetry data and identify potential network issues. This approach allows for proactive identification and resolution of faults, improving overall network reliability and performance.
NEW QUESTION # 61
How often does Marvis Minis execute automatic validations?
- A. Every day
- B. Every hour
- C. Every week
- D. Every 30 minutes
Answer: B
Explanation:
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.
References:- Juniper Mist Marvis Minis Operations and Validation Guide
NEW QUESTION # 62
Which type of machine learning does Radio Resource Management (RRM) use?
- A. Supervised learning
- B. Reinforcement learning
- C. Unsupervised learning
- D. Cognitive learning
Answer: B
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 # 63
You want to override radio frequency templates in Juniper Mist.
Which two settings in the UI will accomplish this task? (Choose two.)
- A. AP-specific settings
- B. Labels
- C. Device Profiles
- D. WLAN Templates
Answer: A,B
Explanation:
InJuniper Mist Wireless Assurance, radio frequency (RF) configurations such as transmit power, channel width, and band selection are typically managed throughRF Templatesat the site or organization level.
However, administrators canoverride RF Template settingsfor specific devices or groups of devices when custom configurations are required.
According to theJuniper Mist Wireless Assurance Configuration Guide, RF template overrides can be accomplished using two UI configuration options:
"Administrators can apply overrides to RF settings either per access point using AP-specific settings or across a defined group of APs using labels."
* AP-specific settings (A):Allow administrators to manually modify the radio parameters of a single access point, overriding site-level template values.
* Labels (C):Used to group access points logically (e.g., by floor or building) and apply customized configurations or overrides to those APs collectively.
Device Profiles (B)are used for wired switch configurations, andWLAN Templates (D)control SSID-related configurations-not RF parameters.
Therefore, the correct answers areA. AP-specific settingsandC. Labels.
References:- Juniper Mist Wireless Assurance Configuration and RF Management Guide- Juniper Mist Cloud Template and Site Configuration Documentation- Juniper Mist AI Operations and RF Optimization Overview
NEW QUESTION # 64
Exhibit:
Referring to the exhibit, how many Marvis for Wireless subscriptions have been purchased and onboarded?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
Explanation:
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 as Service 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.
References:- Juniper Mist Cloud Administration Guide- Juniper Mist Licensing and Subscription Management Documentation- Juniper Mist Marvis Virtual Network Assistant Overview
NEW QUESTION # 65
What are device-specific WAN Edge templates used for in an SD-WAN configuration?
- A. To automate the WLAN template process
- B. To automatically generate configuration elements specific to device models
- C. To perform traffic inspection for WAN edge devices
- D. To monitor network events and stop attacks
Answer: B
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 # 66
Which two statements correctly describe Mist claim codes and activation codes? (Choose two.)
- A. Activation codes may be used to claim multiple APs at once.
- B. Claim codes may be used to claim multiple APs at once.
- C. An activation code is printed on a sticker on the AP.
- D. Claim codes may be used to claim only one AP.
Answer: A,D
Explanation:
Claim Codes: Claim codes are unique to each AP and can be used to claim only one AP at a time. This ensures each device is correctly registered and managed individually within the Mist system.
Activation Codes: Activation codes can be used to claim multiple APs at once, facilitating bulk onboarding and simplifying the setup process for large deployments.
NEW QUESTION # 67
Which Juniper device is used in Routing Assurance?
- A. MX Series
- B. Session Smart Routers
- C. EX Series Switches
- D. SRX Series Firewalls
Answer: B
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 # 68
Which two statements are correct after you request the subscription renewal using e-mail? (Choose two.)
- A. Juniper Mist sends a cancellation notice.
- B. Juniper Mist processes the order and sends an activation code.
- C. Juniper Mist e-mails the support request for the selected subscriptions.
- D. Juniper Mist sends a welcome package with promotional materials.
Answer: B,C
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 # 69
Which statement about microservices is correct?
- A. Microservices communicate with each other using APIs.
- B. Microservices are developed as a suite of applications and rely on developers to deliver updates to the entire suite at once.
- C. Microservices are designed to be dependent on each other to ensure that if one process fails, the remaining processes will not continue to operate.
- D. Microservices must share a common database to ensure data integrity.
Answer: A
Explanation:
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.
References:- Juniper Mist Cloud Architecture and Operations Guide- Juniper Mist Cloud Fundamentals Study Guide- Juniper Mist AI and Microservices Overview
NEW QUESTION # 70
Which two statements correctly describe Mist single sign-on (SSO)? (Choose two.)
- A. Mist administrative logins cannot use SSO.
- B. Mist administrative logins can use SSO.
- C. Guest user access can use SSO.
- D. Guest user access cannot use SSO.
Answer: B,C
Explanation:
SSO can be implemented for guest user access, allowing them to authenticate through their existing enterprise identity provider (IdP) instead of creating separate accounts for the Mist network.
Mist supports SSO for administrative logins, enabling IT administrators to use their existing corporate credentials (e.g., Active Directory) to access the Mist cloud management platform.
NEW QUESTION # 71
Where do reminders about subscription expiration appear in the Juniper Mist portal?
- A. In the dashboard alerts
- B. In the device's insights section
- C. In Marvis Actions
- D. In a banner message at the top of the Juniper Mist portal
Answer: D
Explanation:
Juniper Mist Cloud provides visual and automated notifications to alert administrators aboutsubscription status and expirationfor services such asWireless Assurance, Wired Assurance, WAN Assurance, Premium Analytics, and Marvis AI.
According to theJuniper Mist Cloud Administration and Licensing Guide, the system:
"Displays subscription and license expiration warnings in a banner across the top of the Mist portal interface when licenses are within their renewal window." This banner typically appears in yellow or red, depending on urgency, and includes direct links to the Subscriptionspage for renewal actions.
While subscription status information can also be viewed manually underOrganization # Subscriptions, the real-time reminders and notificationsappear asbanner messages at the top of the Mist Portal.
OptionsB,C, andDare incorrect because:
* Dashboard alerts focus on network events, not licensing.
* Marvis Actions highlights operational or performance issues.
* Device insights report performance metrics, not subscription data.
Therefore, the correct answer isA. In a banner message at the top of the Juniper Mist portal.
References:- Juniper Mist Cloud Licensing and Subscription Management Guide- Juniper Mist Administration and Portal User Interface Overview- Juniper Mist Cloud Operations and Renewal Notifications Documentation
NEW QUESTION # 72
In the Mist UI, which part of the system platform provides information about missing VLANs?
- A. Switch Insights
- B. Marvis Actions
- C. Service-Level Exceptions
- D. Events
Answer: B
Explanation:
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.
NEW QUESTION # 73
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