Juniper JN0-251 Dumps Questions [2024] Pass for JN0-251 Exam [Q44-Q67]

Published date May 13, 2024

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Juniper JN0-251 Dumps Questions [2024] Pass for JN0-251 Exam

Updated Juniper Study Guide JN0-251 Dumps Questions

The JN0-251 Exam covers a range of topics related to Mist AI, including network automation, data analysis, and machine learning. Candidates will be tested on their ability to configure and troubleshoot Mist AI devices, as well as their understanding of key concepts such as AI-driven troubleshooting and proactive network management. Successful completion of the JN0-251 Exam demonstrates that the candidate has the knowledge and skills necessary to work with Mist AI in a professional setting.

Q44. Which two APIs are supported by Mist? (Choose two.)

SOAP

gRPC

Webhook

REST

Q45. Where in the Mist UI would the Persistently Failing Clients report be found?

Alerts

Marvis Actions

Successful Connects SLE

Insights

Q46. What is an 802.11 management frame transmitted by an AP?

echo request

ping

keepalive

beacon

Q47. You attempt to log in to manage.mist.com, however you receive a 404 error from your browser. You are able to browse other public websites and you suspect a problem with manage.mist.com.
In this scenario, which step would you take to immediately find out the status of the Mist cloud?

Visit https://support.juniper.net/support/.

Visit https://status.mist.com.

Visit https://mist.com/status.

Visit https://www.mist.com/support.

The step that you would take to immediately find out the status of the Mist cloud is to visit https://status.mist.com. This is the official website that provides real-time information and updates on the availability and performance of the Mist cloud services, such as the Mist portal, the Mist API, the Mist AI engine, and the Mist regions. You can also subscribe to receive notifications via email, SMS, or webhook when there are any incidents or maintenance events affecting the Mist cloud.

Q48. What happens when Mist subscriptions expire?

Devices retain their configurations but the Mist user is prevented from accessing the Mist management GUI.

Devices retain their configurations and all Mist management GUI functionality remains available to the user.

Devices retain their configurations but Mist management GUI functionality related to expired subscriptions are not configurable by the user.

Devices retain their configurations for 90 days; if the subscriptions are not renewed, the configuration is deleted and the devices are reset to factory default.

Reference:
The correct answer is C. Devices retain their configurations but Mist management GUI functionality related to expired subscriptions are not configurable by the user.
According to the official Juniper documentation1, post subscription expiration, your network will continue to operate. However, Juniper Mist does reserve the right to give read only access or terminate access post 90 days of subscription expiration, if you have no intent to renew subscriptions. No support will be available if there is no active subscription.

Q49. In a Mist deployment, the Radio Resource Management feature is an example of which type of machine learning?

visual learning

reinforcement learning

unsupervised learning

supervised learning

In a Mist deployment, the Radio Resource Management (RRM) feature is an example of reinforcement learning. Reinforcement learning is a type of machine learning that works on the principle that an agent takes an action which is either penalized or rewarded based on the result in order to reinforce the optimal behavior1.
RRM is a feature that optimizes the wireless network performance and user experience by dynamically adjusting the radio frequency (RF) settings, such as channel, bandwidth, and power, of the access points (APs) based on the changing environmental conditions, such as interference, traffic, or user density2. RRM uses reinforcement learning to learn from the feedback and data collected by the APs and the Mist cloud and to make decisions that improve the network quality of service (QoS) and service level expectations (SLEs)3.

Q50. What is a feature within Mist AI that uses unsupervised machine learning?

vBLE engagement

Insights

Service Level Expectations

Alerting

Q51. Which protocol does the REST API use?

syslog

SNMP

HTTP

SSL

Reference:
The protocol that the REST API uses is HTTP. HTTP stands for Hypertext Transfer Protocol and is a standard protocol for exchanging information between different applications or services over the internet. HTTP defines a set of methods, such as GET, POST, PUT, and DELETE, that specify the type of action to be performed on a resource. HTTP also defines a set of status codes, such as 200 OK, 404 Not Found, and 500 Internal Server Error, that indicate the outcome of the request.
The REST API is an application programming interface that conforms to the design principles of the REST, or representational state transfer, architectural style. REST APIs provide a flexible, lightweight way to integrate applications and to connect components in microservices architectures. REST APIs rely on HTTP to transfer a representation of the state of the resource to the requester or endpoint. The representation can be in various formats, such as JSON, XML, HTML, or plain text.

Q52. What are two valid Mist subscription status states in the Mist GUI? (Choose two.)

Expired

Perpetual

Staged

Exceeded

Q53. Click the Exhibit button.

Referring to the exhibit, which Marvis language would you use to query Mist about an issue?

natural language

SQL

Python

query language

Q54. Which Mist AI feature would help you to troubleshoot a client’s failed authentication?

client dashboard

live view

dynamic packet capture

WLAN profile

Q55. Which statement is correct about Mist SLEs?

A Mist SLE is comprised of a single classifier.

A Mist SLE is comprised of multiple classifiers.

A Mist classifier is comprised of multiple SLEs.

A Mist classifier is comprised of a single SLE.

Q56. Which two methods are supported for configuring a Mist environment? (Choose two.)

Use the API.

Use the GUI.

Use the CLI.

Use NETCONF.

Reference:
According to the Juniper Networks documentation, there are two methods that are supported for configuring a Mist environment: using the API and using the GUI1. The API is a programmatic interface that allows you to interact with the Mist cloud and perform various tasks, such as creating and managing organizations, networks, sites, devices, users, and policies2. The API uses the RESTful architecture and supports JSON and XML formats2. You can use the API to automate and customize your Mist environment according to your needs2.
The GUI is a graphical user interface that allows you to access and manage your Mist environment through a web browser1. The GUI provides a user-friendly and intuitive way to configure and monitor your Mist devices, networks, sites, users, and policies3. The GUI also provides various features, such as dashboards, reports, analytics, insights, troubleshooting tools, and Marvis virtual network assistant3. You can use the GUI to easily and quickly set up and optimize your Mist environment3.

Q57. Which two statements are correct about creating Mist sites? (Choose two.)

A Mist site can only belong to a single organization.

You can create and manage multiple sites with a Mist account.

You can only create and manage a single site with a Mist account.

A Mist site can belong to multiple organizations.

Q58. Which statement is correct about a WLAN RF medium?

A WLAN RF is a full duplex, contention free medium where each client transmits on a separate channel.

A WLAN RF is a full-duplex, contention-free medium where 802.11 stations can transmit and receive at the same time.

A WLAN RF is a half-duplex, shared medium where 802.11 stations contend with each other for access.

A WLAN RF is a half-duplex, contention-free medium where the access point polls each station in turn.

Q59. You want to obtain detailed information on a wireless client.
In this scenario, which area would you use to accomplish this task?

Insights

Templates

SLEs

Security

The area that you would use to obtain detailed information on a wireless client is the Insights area. The Insights area provides a comprehensive view of the wireless network performance and user experience, including the client dashboard, the live view, the service-level expectations (SLEs), and the Marvis virtual network assistant.
The client dashboard allows you to view and search for individual wireless clients and see their connection details, such as device type, MAC address, IP address, SSID, AP name, signal strength, throughput, data usage, location, and more. You can also perform actions on the clients, such as block, unblock, or capture packets.
The live view allows you to monitor the real-time status and activity of the wireless network and clients. You can see the number of connected clients, the traffic volume, the SLE scores, the top APs and SSIDs, and more. You can also filter and drill down into specific clients, APs, SSIDs, or sites.
The SLEs allow you to define and measure the quality of service and user experience for the wireless network. You can set thresholds and goals for key metrics, such as throughput, coverage, capacity, roaming, uptime, and WAN. You can also receive alerts and recommendations when the SLEs are violated.
The Marvis virtual network assistant allows you to interact with the wireless network using natural language commands. You can ask questions, troubleshoot issues, perform actions, and get insights from Marvis. For example, you can ask Marvis to show you the details of a wireless client or to explain why a client had a poor connection.

Q60. What are two prerequisites for adopting Juniper switches for Wired Assurance? (Choose two.)

a claim code

a Wired Assurance license

an activation code

an account on manage.mist.com

Reference:
Two prerequisites for adopting Juniper switches for Wired Assurance are a Wired Assurance license and an account on manage.mist.com. These are the two essential requirements that enable the cloud-based management and AI features of the Juniper Mist platform for the switches.
A Wired Assurance license is a subscription that allows you to onboard, configure, and monitor your Juniper EX Series Switches from the Juniper Mist cloud. A Wired Assurance license also provides access to the Mist AI engine, which delivers insights, automation, and service-level expectations (SLEs) for your wired network. You can purchase a Wired Assurance license from a Juniper partner or reseller1.
An account on manage.mist.com is a user account that allows you to access the Juniper Mist portal and the Juniper Mist API. The Juniper Mist portal is a web-based interface that lets you manage and troubleshoot your wired and wireless networks from anywhere. The Juniper Mist API is an application programming interface that lets you integrate and automate your network operations with third-party applications and services2.

Q61. Which machine learning method involves rewarding and punishing an agent?

unsupervised learning

supervised learning

deep learning

reinforcement learning

Q62. Mist cloud supports single sign-on in which two scenarios? (Choose two.)

account login used for NETCONF

Wi-Fi guest login access

account login used for the RESTful API

admin login to the Mist portal

Q63. Besides providing AP configuration status, for which other purpose is the LED used in the location design phase?

antenna orientation

height orientation

channels in use

frequency selection

Q64. Mist has detected a bad cable.
What are two ways that Marvis determined this result? (Choose two.)

It identified network loops.

It identified port flapping.

It identified interface errors.

It identified a missing VLAN.

Mist has detected a bad cable by using two methods: port flapping and interface errors. These methods are based on the data collected by the Mist access points, switches, and WAN edge devices from the cable statistics, link statistics, link errors, and traffic patterns.
Port flapping is a condition where a port on a switch or a device repeatedly goes up and down, causing network instability and packet loss. Port flapping can be caused by a bad cable that has physical damage, loose connection, or interference. Mist can detect port flapping by monitoring the link status and the number of link state changes on the port.
Interface errors are errors that occur on the interface level of a switch or a device, such as input errors, output errors, frame errors, CRC errors, MTU errors, etc. Interface errors can indicate a bad cable that has poor quality, mismatched speed or duplex settings, or incorrect wiring. Mist can detect interface errors by monitoring the error counters and the error rates on the interface.

Q65. What is a Mist Coverage SLE based upon?

an average of client data

a summary of switch data

a summary of user minutes

an average across APs

Q66. Which Marvis Action category will detect a bad cable based on information and behavior of a single AP?

Connectivity

Layer 1

Switch

Reference:
According to the web search results, the Marvis Action category that will detect a bad cable based on information and behavior of a single AP is Switch1. The Switch category lists the issues related to the switches that are connected to the Mist APs, such as missing VLANs, L2 loops, or bad cables1. The bad cable action detects if an AP is connected to a switch port that has a faulty cable, which can cause packet loss, CRC errors, or link flaps1. The bad cable action is based on the information and behavior of a single AP, such as the AP’s MAC address, IP address, switch port, and link status1. The bad cable action also provides a recommended solution, which is to replace the cable or use another switch port1.

Q67. What are two characteristics of the 2.4 GHz band when compared to the 5 GHz band? (Choose two.)

shorter wavelength

lower frequency

less non-Wi-Fi interference

more congestion

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Juniper JN0-251: Mist AI, Associate (JNCIA-MistAI) is a certification exam that is ideal for network administrators, engineers, and architects who want to validate their expertise in Juniper’s Mist AI technology. JN0-251 exam covers essential topics such as Mist AI fundamentals, design considerations, deployment and management, and troubleshooting. Mist AI, Associate (JNCIA-MistAI) certification is an entry-level certification and can be a valuable asset to your career in the IT industry, leading to higher-paying job opportunities, job security, and career advancement.

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