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【Hardware】 Study JN0-253 Plan, JN0-253 Labs

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Juniper JN0-253 Exam Syllabus Topics:
TopicDetails
Topic 1
  • 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 2
  • Juniper Mist Network Operations and Management: This domain examines operational features across Wi-Fi, Wired, WAN, Routing, and Access Assurance, delivering specialized management capabilities for different network infrastructure layers.
Topic 3
  • 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 (Q53-Q58):NEW QUESTION # 53
When a Juniper Mist managed switch is powered on, which event must be completed prior to the Zero-Touch Provisioning (ZTP) process moving forward?
  • A. NETCONF must be configured on the switch.
  • B. The switch's clock must be synchronized with an NTP server.
  • C. All user accounts must be configured on the switch.
  • D. A DHCP lease must be obtained by the switch.
Answer: D
Explanation:
A DHCP lease must be obtained by the switchbefore the ZTP process proceeds. Juniper documentation clarifies: "Ensure that a DHCP server is reachable. In addition to providing an IP address to the switch, your DHCP server must provide the following information: a default gateway, an NTP server, and a DNS server address..." The initial event in the ZTP workflow is the switch receiving a valid IP address via DHCP. Only after obtaining an address can the switch connect to the Mist cloud and proceed with zero-touch provisioning.
Other requirements, such as user account, NETCONF, or NTP sync, occur later or are handled automatically via cloud policy after onboarding.
Reference:Juniper Mist Wired Assurance Configuration Guide , Cloud-Ready EX and QFX Switches with Mist Manual , Ports to enable on your firewall - Mist.

NEW QUESTION # 54
Which machine learning method uses unlabeled data sets?
  • A. Cognitive learning
  • B. Reinforcement learning
  • C. Unsupervised learning
  • D. Supervised learning
Answer: C
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 # 55
Which two subscriptions are required to use Marvis Minis? (Choose two.)
  • A. vBLE Engagement
  • B. Marvis for Wireless
  • C. Premium Analytics
  • D. WiFi Management and Assurance
Answer: B,D
Explanation:
To use Marvis Minis, both theWiFi Management and AssuranceandMarvis for Wirelesssubscriptions are required. According to the official Juniper documentation, Marvis Minis "does not require a separate subscription. Any organization with an active Marvis for Wireless subscription is automatically entitled for Marvis Minis support." However, the Marvis for Wireless subscription operates on top of the foundational WiFi Management and Assurance subscription, which is necessary to operate APs and the wireless network within the Mist Cloud. As stated: "In addition to your base Assurance subscriptions (Wireless Assurance, WAN Assurance, or Wired Assurance), you also need Marvis subscriptions for each device..." Therefore, both are prerequisites for using Marvis Minis, ensuring full wireless management with AI-powered digital twin validation.
Reference:Juniper Mist Marvis Minis Overview , Marvis Subscription Reference

NEW QUESTION # 56
Which two statements describe port profiles? (Choose two.)
  • A. They must be assigned to only one port.
  • B. They include a set of routing configurations.
  • C. They can be assigned to multiple ports.
  • D. They include a set of interface configurations.
Answer: C,D
Explanation:
Port profilesinJuniper Mist Wired Assuranceare reusable configuration templates that define how switch ports behave. They streamline switch provisioning and ensure consistent configurations across multiple ports and devices within a site or organization.
According to theJuniper Mist Wired Assurance Configuration Guide, port profiles are defined as:
"A collection of interface-level settings that can be applied to one or more switch ports to simplify configuration and ensure uniform policy enforcement." Key characteristics include:
* Reusable templatesort profiles can beassigned to multiple portson one or more switches, allowing rapid deployment and consistent port behavior (e.g., access, trunk, voice VLAN).
* Interface-level parameters:They include settings such as VLAN assignments, PoE configuration, speed, duplex, and LLDP options.
Port profilesdo not include routing configurations(those are defined at the Layer 3 interface or VLAN interface level) and arenot limited to a single port.
Therefore, the correct answers are:
* A. They can be assigned to multiple ports.
* B. They include a set of interface configurations.
References:- Juniper Mist Wired Assurance Configuration and Templates Guide- Juniper Mist Cloud Switch Management Documentation- Juniper EX Series Switch Wired Assurance Overview

NEW QUESTION # 57
Which operation does an HTTP POST perform?
  • A. create
  • B. delete
  • C. write
  • D. read
Answer: A
Explanation:
An HTTP POST operation performs the "create" function in web communications. This method sends data to a server to create a new resource. For example, when you submit a form on a website, the data is sent to the server using a POST request, which then creates a new entry in the database.

NEW QUESTION # 58
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