Exam: JN0-253

Exam Details
Exam questions are derived from the recommended training and the exam resources listed above. Pass/fail status is available immediately after taking the exam. The exam is only provided in English.

Exam Code  JN0-253
Prerequisite Certification
Exam Length  90 minutes
Exam Type 65 multiple-choice questions

Exam Objectives
Here is a high-level view of the skillset required to successfully complete the JNCIA-MistAI certification exam.

Exam Objective

Juniper Mist Cloud Fundamentals

Identify fundamental concepts about the Juniper Mist cloud-native architecture, including:
AI concepts
Machine learning
Benefits of using cloud-based management
Juniper Mist cloud capabilities and use cases

Identify the concepts or functionality of Juniper Mist cloud accounts, including:
Creation and management of user accounts
Capabilities of different account roles
Juniper Mist Cloud user/account authentication methods

Describe the concepts or functionality of Juniper Mist initial configurations, including:
Factory default configurations and network connection prerequisites
Device claiming and onboarding
Creation and management of Juniper Mist organizations and sites
Template usage
Labels and policies

Identify the concepts or functionality of Juniper Mist advanced configurations, including:
Subscriptions (Licensing)
Certificates (Radsec, Mist)
Auto provisioning

Juniper Mist Network Operations and Management
Identify concepts or functionality of Juniper Mist wireless network management and operations features:

Benefits and features of Juniper Mist Wi-Fi Assurance
Identify concepts or functionality of Juniper Mist wired network management and operations features:
Benefits and features of Juniper Mist Wired Assurance
Benefits and features of Juniper Mist WAN Assurance
Benefits and features of Juniper Mist Routing Assurance

Identify concepts or functionality of Juniper Mist network access management and features:
Benefits and features of Juniper Mist Access Assurance

Juniper Mist Monitoring and Analytics
Identify the concepts or components of Juniper Mist AI insights, monitoring, and analytics, including:
Service-level expectations (SLEs)
Packet captures
Juniper Mist insights
Alerts
Audit logs

Marvis™ Virtual Network Assistant AI
Identify the concepts or functionality of Marvis Virtual Network Assistant, including:
Marvis actions (organization level, site level)
Marvis queries
Marvis Minis

Location-based Services
Identify the concepts or components of Location-based Services (LBS), including:
Juniper Mist vBLE concepts (such as asset visibility, vBLE engagement)

Juniper Mist Cloud Operations
Identify the concepts or components of Juniper Mist APIs
RESTful
Websocket
Webhook

Identify the options of Juniper Mist support
Support tickets
Update information
Documentation

Key Details:
Exam Code: JN0-253
Certification: JNCIA-MistAI (Juniper Mist AI, Associate)
Focus Areas: Juniper Mist Cloud architecture, WLAN setup, AI-driven features (Marvis), API usage, and network operations.
Question Format: 65 multiple-choice questions (some sources mention scenario-based/drag-and-drop too).
Duration: 90 minutes.
Delivery: Pearson VUE (online proctored or test center).
Language: English only.
Prerequisites: None.
Results: Immediate pass/fail.

What it Covers (Domains):
Juniper Mist Cloud Fundamentals: Architecture, APIs, scalability.
Juniper Mist Configuration Basics: Site, WLAN, SSID setup, policies.
Juniper Mist Network Operations: Firmware, templates, daily tasks.
Mist AI Features: Marvis Virtual Network Assistant, analytics, location services.

This exam validates your ability to use Juniper's AI-driven cloud for managing modern Wi-Fi networks.

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QUESTION 1
Which statement is correct about a 3-stage campus fabric IP Clos?

A. The distribution layer is connected to the access layer.
B. The distribution layer is connected to the core layer.
C. The core layer is connected to the access layer.
D. The core layer devices are connected to each other.

Answer: C

Explanation:
Junipers official Campus Fabric IP Clos design for Mist Wired Assurance defines that the 3-stage IP
Clos topology eliminates the traditional distribution layer entirely. This architecture is intended for
smaller campus environments that do not need an intermediate distribution layer between the access and core.
oeJunipers Wired Assurance supports 3-Stage and 5-Stage IP Clos deployments. The 3-Stage IP Clos is
targeted towards deployments that do not require a Distribution Layer and have smaller scale requirements.
Because the distribution layer is not present, the only hierarchical connection in a 3-stage campus
fabric is between the core and access layers. Traffic is routed directly at the access layer, and each
access switch acts as a Layer-3 gateway (IRB) for its VLANs.
oeIn a campus fabric IP Clos architecture, Mist provisions Layer-3 (L3) integrated routing and bridging
(IRB) interfaces on the access layer. All the access switches are configured with the same IP address for each L3 subnet.
Additionally, the Juniper documentation explains that point-to-point links are configured between
layers, and in the case of the 3-stage design (with no distribution), this means between the core and access devices:
oeThe point-to-point links between each layer utilize addressing to conserve addresses.
Therefore, the correct statement is C: The core layer is connected to the access layer.
Options A and B incorrectly mention a distribution layer that does not exist in this topology.
Option D is incorrect because core (spine) devices in a Clos fabric are not interconnected with each other.
Reference:
Juniper Mist AI for Wired “ Campus Fabric IP Clos Architecture Guide
Juniper Mist AI for Wired “ Campus Fabric IP Clos Workflow
Juniper Mist AI for Wired “ Configure Campus Fabric IP Clos
Juniper Validated Design “ Campus Fabric IP Clos Deployment Types

QUESTION 2
Which three steps should be part of the campus fabric deployment? (Choose three.)

A. Define the physical connections.
B. Define the networks of interest.
C. Configure the DNS server.
D. Choose the topology.
E. Configure the group-based policy (GBP) tag.

Answer: A, B, D

Explanation:
According to the Juniper Mist AI for Wired “ Campus Fabric IP Clos Deployment Workflow, deploying
a campus fabric involves a defined sequence of planning and configuration steps within the Mist
Cloud interface. The key stages include:
oeTo deploy a campus fabric, you must first define the topology type, identify the physical connections
between devices, and define the networks of interest that will be extended across the fabric.
Breaking this down:
Choose the topology (D): Selecting the correct fabric type (3-Stage or 5-Stage IP Clos) determines
how access, distribution, and core switches will interconnect.
Define the physical connections (A): This step involves specifying the uplink and downlink
relationships between switches so that Mist can auto-generate EVPN-VXLAN and routing
configurations.
Define the networks of interest (B): These are the VLANs and subnets that need to be extended
across the fabric for user and device connectivity.
Steps such as configuring DNS servers or defining GBP tags are not part of the campus fabric
deployment workflow in Mist Wired; they are optional or separate configurations outside the main
deployment flow.
Reference:
Juniper Mist AI for Wired “ Campus Fabric IP Clos Deployment Workflow
Juniper Mist AI for Wired “ Configure Campus Fabric IP Clos
Juniper Validated Design “ Campus Fabric Overview
===========

QUESTION 3
What is the primary benefit of using switch configuration templates?

A. They improve the performance of switches.
B. They reduce Junos OS upgrade times.
C. They make it easier to make switch-specific configuration changes.
D. They provide a consistent configuration for all switches in an organization.

Answer: D

Explanation:
In Juniper Mist AI for Wired, configuration templates are a foundational part of switch onboarding
and management. The primary purpose of these templates is to ensure configuration consistency
across all switches that belong to a specific site or organization.
oeSwitch configuration templates allow administrators to define a standard configuration that is
automatically applied to all switches within a site or organization, ensuring consistency and reducing
configuration errors.
Templates can contain base configuration parameters such as NTP, syslog, VLANs, port profiles, and
authentication settings. When new switches are onboarded to the Mist Cloud, they automatically
inherit the templates configuration, ensuring uniform behavior across the network fabric.
Option A is incorrect ” templates do not directly impact hardware performance.
Option B is incorrect ” templates are not related to upgrade times.
Option C is incorrect ” templates are used for uniformity, not for switch-specific changes.
Option D correctly describes their main benefit ” ensuring consistent configuration across all switches.
Reference:
Juniper Mist AI for Wired “ Switch Configuration Templates Guide
Juniper Mist AI for Wired “ Wired Assurance Administration Guide
Juniper Validated Design “ Mist Wired Configuration Best Practices

QUESTION 4
Referring to the exhibit, what is the purpose of the Save button in the upper-right corner of the Mist dashboard?

A. It generates a backup of the current port configuration.
B. It resets the port configuration to its default settings.
C. It previews the impact of the port configuration changes before applying them.
D. It applies the port configuration changes to the switch.

Answer: D

Explanation:
In the Juniper Mist AI for Wired dashboard, administrators can select one or more switch ports (as
shown in the exhibit, e.g., port ge-0/0 on an EX4100-48MP). Once configuration changes are
made ” such as VLAN assignment, port profiles, PoE settings, or administrative state ” the Save
button must be clicked to confirm and apply those changes to the device.
oeWhen making configuration changes in the Mist switch interface, the Save button must be used to
confirm the modifications. Clicking Save applies the selected port settings to the switch through Mist Cloud.
Option A is incorrect: saving does not create a backup. Backups and snapshots are handled through
Mists configuration archive, not via the Save button.
Option B is incorrect: Save does not reset configuration; instead, it commits changes.
Option C is incorrect: there is no preview function tied to Save.
Option D is correct: the Save button is explicitly for applying configuration changes to the selected
switch or port(s).
Reference:
Juniper Mist AI for Wired “ Switch Port Configuration Guide
Juniper Mist AI for Wired “ Wired Assurance Administration Guide
Juniper Mist Documentation “ Managing Switch Interfaces

QUESTION 5
You have two sites connected to an EVPN network. Each site is using the 172.16.1.0 network for its own respective site.
How does EVPN prevent overlap in this scenario?

A. It elects a designated forwarder.
B. It uses a Layer 2 gateway.
C. It uses a route distinguisher.
D. It uses an Ethernet segment identifier (ESI).

Answer: C

Explanation:
EVPN, when used with VXLAN, leverages BGP MPLS/VXLAN control plane mechanisms. To prevent
overlapping IP prefixes between different tenants or sites, EVPN uses a Route Distinguisher (RD).
oeIn EVPN-VXLAN, the route distinguisher (RD) makes routes unique when overlapping IP prefixes or
MAC addresses are advertised between multiple tenants or sites.

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