Latest Apr 18, 2024 JN0-251 Brain Dump: A Study Guide with Tips & Tricks for passing Exam
JN0-251 Question Bank: Free PDF Download Recently Updated Questions
The JN0-251 exam is a multiple-choice test that consists of 65 questions. JN0-251 exam is computer-based and can be taken at a Pearson VUE test center or online. Candidates have 90 minutes to complete the exam, and the passing score is 70%. JN0-251 exam is available in English and Japanese. Mist AI, Associate (JNCIA-MistAI) certification is valid for three years, after which candidates must recertify to maintain their certification status.
The JN0-251 exam is an essential certification for IT professionals who are interested in pursuing a career in network engineering, wireless networking, or cloud computing. The Mist AI technology is becoming increasingly popular in the industry, and organizations are looking for IT professionals who have the skills and knowledge to deploy and manage Mist AI networks. Passing the JN0-251 exam and earning the JNCIA-MistAI certification is an excellent way for IT professionals to demonstrate their expertise in this emerging technology and advance their careers.
NEW QUESTION # 28
Which statement defines the total user minutes?
- A. The total number of minutes for which Mist has statistics for each client.
- B. The average number of minutes that all clients have been associated to the network.
- C. The total amount of device uptime over the last seven days.
- D. The total number of minutes between a client's last association and disassociation.
Answer: D
NEW QUESTION # 29
Click the Exhibit button.
You notice a green LED emitted from your AP43.
Referring to the exhibit, what does this signal indicate?
- A. The AP is not configured correctly but one user is connected to it.
- B. The AP is not configured correctly with no users connected to it.
- C. The AP is configured correctly with no users connected to it.
- D. The AP is configured correctly and at least one user is connected to it.
Answer: D
NEW QUESTION # 30
Alert templates are assigned to sites in which area of the Mist GUI?
- A. Site Configuration
- B. Alert Template Configuration
- C. Site Group
- D. Organization Settings
Answer: C
Explanation:
Alert templates are assigned to sites in the Site Group area of the Mist GUI. A site group is a logical grouping of sites that share common settings and policies, such as alert templates, WLAN profiles, switch profiles, and site tags. A site group can contain one or more sites, and a site can belong to one or more site groups.
To assign an alert template to a site group, you need to navigate to Organization > Site Groups and select the site group that you want to edit. Then, you need to click on the Alert Template tab and choose the alert template that you want to apply to the site group. You can also create a new alert template or edit an existing one from this tab.
An alert template is a configuration that defines the types of alerts that you want to monitor and receive notifications for on your network. Alerts are events that indicate ongoing network and device issues, such as device offline, AP reboot, PSK failure, rogue AP, etc. You can create and manage alert templates in the Monitor > Alerts > Alert Configuration area of the Mist GUI.
NEW QUESTION # 31
Mist has detected a bad cable.
What are two ways that Marvis determined this result? (Choose two.)
- A. It identified port flapping.
- B. It identified network loops.
- C. It identified a missing VLAN.
- D. It identified interface errors.
Answer: A,D
Explanation:
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.
NEW QUESTION # 32
What are two prerequisites for adopting Juniper switches for Wired Assurance? (Choose two.)
- A. an account on manage.mist.com
- B. an activation code
- C. a Wired Assurance license
- D. a claim code
Answer: A,C
Explanation:
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.
NEW QUESTION # 33
In which two Mist configuration levels would you create labels? (Choose two.)
- A. site
- B. location
- C. organization
- D. switch
Answer: A,C
Explanation:
Reference:
Labels are a way of grouping devices, users, or applications in the Juniper Mist cloud. Labels can be created at the site level or the organization level1. Labels can be used to apply policies, templates, or service-level expectations (SLEs) to the devices, users, or applications that match the label criteria1. Labels can also be used to filter data in the Juniper Mist dashboard or reports1.
NEW QUESTION # 34
Users are complaining about WLAN performance and the Mist dashboard reports non-Wi-Fi interference.
Which diagnostics tool would you use to further investigate this issue on-site and determine the location of the interference?
- A. wireless design software
- B. WLAN scanner
- C. protocol analyzer
- D. spectrum analyzer
Answer: D
Explanation:
Reference:
The correct answer is A. spectrum analyzer. This is the diagnostics tool that you would use to further investigate the issue of non-Wi-Fi interference on-site and determine the location of the interference. A spectrum analyzer is a device that measures and displays the frequency and amplitude of the electromagnetic signals in a given spectrum1. A spectrum analyzer can help you identify the sources and types of non-Wi-Fi interference, such as microwave ovens, cordless phones, Bluetooth devices, or radar systems, that may affect the WLAN performance2. A spectrum analyzer can also help you locate the interference by showing the signal strength and direction of the interfering signals2.
NEW QUESTION # 35
Which two APIs are supported by Mist? (Choose two.)
- A. Webhook
- B. gRPC
- C. SOAP
- D. REST
Answer: A,D
NEW QUESTION # 36
You just received the newest Mist AP and want to enable a feature that is only available at this time on Release Candidate 1.
In this scenario, using the Mist GUI, where would you determine which version of Release Candidate 1 is available for your AP?
- A. Support Tickets and Documentation -> Ports & Endpoints
- B. Support Tickets and Documentation -> Mist Edge Updates
- C. Support Tickets and Documentation -> Firmware Updates
- D. Support Tickets and Documentation -> Feature Updates
Answer: C
Explanation:
Reference:
If you want to enable a feature that is only available on Release Candidate 1, you need to upgrade your AP to the latest firmware version that supports that feature. To do that, you can use the Firmware Upgrade feature in the Mist GUI, which allows you to automatically or manually upgrade multiple APs on your site1. To find out which version of Release Candidate 1 is available for your AP, you can go to Support Tickets and Documentation -> Firmware Updates in the Mist GUI. There, you will see a list of the latest firmware versions for different AP models, along with the release notes and the features they support2. You can also use the ? mark in the upper right of the UI to see the latest firmware and previous production releases1. You can then select the desired firmware version from the dropdown menu and start the upgrade process1.
NEW QUESTION # 37
You want to review client information about a specific AP.
In this scenario, where in the UI would you look?
- A. SLEs
- B. AP Insights
- C. Client Insights
- D. Access Points
Answer: C
NEW QUESTION # 38
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?
- A. Visit https://support.juniper.net/support/.
- B. Visit https://www.mist.com/support.
- C. Visit https://mist.com/status.
- D. Visit https://status.mist.com.
Answer: D
Explanation:
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.
NEW QUESTION # 39
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. AP
- B. Application
- C. Connectivity
- D. Clients
Answer: C
NEW QUESTION # 40
A user called a help desk to report a Wi-Fi issue.
In this scenario, what information must be provided for Marvis to troubleshoot the issue? (Choose two.)
- A. user home address
- B. the time of the incident
- C. the access point to which the client was connected
- D. the MAC address of the client device
Answer: B,D
Explanation:
A user called a help desk to report a Wi-Fi issue. In this scenario, the information that must be provided for Marvis to troubleshoot the issue are the MAC address of the client device and the time of the incident. These are two of the essential parameters that Marvis needs to identify and analyze the wireless client and its connection history.
The MAC address of the client device is a unique identifier that allows Marvis to locate and track the client on the wireless network. The MAC address can be found on the device settings, label, or sticker, depending on the device type. The MAC address can also be obtained from the Mist portal or the Mist AI App by searching for the client name or IP address.
The time of the incident is the approximate date and time when the user experienced the Wi-Fi issue. The time of the incident can help Marvis narrow down the scope of the troubleshooting and focus on the relevant data and events. The time of the incident can be specified in various formats, such as "today", "yesterday", "last week", "10 minutes ago", "5 pm", etc.
To troubleshoot a Wi-Fi issue using Marvis, you can use phrases such as "troubleshoot client <MAC address> on <time>" or "how was client <MAC address> on <time>" in the Marvis Conversational Assistant window. Marvis will show you the details of the client's connection status, performance, issues, and recommendations.
NEW QUESTION # 41
Under ideal conditions, which frequency band will have the farthest usable range?
- A. 900 MHz
- B. 2.4 GHz
- C. 6 GHz
- D. 5 GHz
Answer: B
NEW QUESTION # 42
How does Mist detect rogue APs?
- A. by using Radio Resource Management (RRM)
- B. by using the AP's third dedicated radio
- C. by using the AP's 2.4 GHz radio band
- D. by using the AP's 5 GHz radio band
Answer: B
Explanation:
Reference:
According to the web search results, Mist detects rogue APs by using the AP's third dedicated radio, which is used for scanning the wireless spectrum and detecting unauthorized APs on both 2.4 GHz and 5 GHz radio bands1. A rogue AP is an unauthorized access point that is installed on a network without the knowledge or consent of the network administrator1. A rogue AP can pose a serious security threat to a network, as it can allow attackers to bypass the network's security policies and gain access to sensitive data or launch other attacks1. A rogue AP can also interfere with the performance of the legitimate APs and cause network congestion or degradation1.
Mist APs have three radios: one for 2.4 GHz, one for 5 GHz, and one for scanning1. The scanning radio is used for detecting rogue, neighbor, and honeypot APs on both 2.4 GHz and 5 GHz radio bands1. This means that regardless of which radios you have enabled on your AP (2.4 GHz or 5 GHz), it will still be able to detect unauthorized APs at any frequency using the scanning radio1. The scanning radio can also provide other benefits, such as monitoring the network performance, optimizing the channel selection, and enhancing the location services1.
Therefore, based on the web search results, Mist detects rogue APs by using the AP's third dedicated radio, which is used for scanning the wireless spectrum and detecting unauthorized APs on both 2.4 GHz and 5 GHz radio bands.
NEW QUESTION # 43
You are inviting a new administrator into a Mist organization.
In this scenario, which two roles are valid? (Choose two.)
- A. Network Admin
- B. Helpdesk
- C. System Admin
- D. Standard
Answer: A,B
Explanation:
Reference:
According to the Administrator Roles page, there are five types of roles that can be assigned to users in a Mist organization: Super User, Network Admin, Helpdesk, Observer, and Installer4. Each type of role has different read and write capabilities for the organization and its sites4. Helpdesk and Network Admin are two of the valid roles that can be selected when inviting a new administrator into a Mist organization4. Standard and System Admin are not valid roles in Mist.
NEW QUESTION # 44
What are two valid Mist subscription status states in the Mist GUI? (Choose two.)
- A. Exceeded
- B. Staged
- C. Expired
- D. Perpetual
Answer: A,C
NEW QUESTION # 45
Which two statements are correct about microservices? (Choose two.)
- A. A microservice can be added without system downtime.
- B. All microservices can be updated at the same time without downtime.
- C. Each microservice uses the same virtual hardware.
- D. A microservice can be updated without system downtime.
Answer: A,D
NEW QUESTION # 46
In a production network, what are two types of security threats? (Choose two.)
- A. neighbor AP
- B. rogue AP
- C. scanning radio
- D. honeypot AP
Answer: B,C
Explanation:
A rogue AP is an unauthorized access point that is installed on a network without the knowledge or consent of the network administrator. A rogue AP can pose a serious security threat to a network, as it can allow attackers to bypass the network's security policies and gain access to sensitive data or launch other attacks. A rogue AP can also interfere with the performance of the legitimate APs and cause network congestion or degradation.
A scanning radio is a device that can scan the wireless spectrum and detect the presence and characteristics of wireless networks. A scanning radio can be used for legitimate purposes, such as network monitoring, troubleshooting, or optimization. However, a scanning radio can also be used for malicious purposes, such as discovering vulnerable networks, capturing network traffic, or launching denial-of-service attacks. A scanning radio can pose a security threat to a network, as it can expose the network's SSID, encryption type, channel, and signal strength.
NEW QUESTION # 47
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Juniper JN0-251: Mist AI, Associate (JNCIA-MistAI) is an excellent certification for professionals who want to enhance their skills in Mist AI. Mist AI, Associate (JNCIA-MistAI) certification exam covers the basics of Mist AI, including its architecture, configuration, and troubleshooting. Mist AI, Associate (JNCIA-MistAI) certification offers a solid foundation for professionals who want to pursue advanced certifications in AI and helps professionals demonstrate their ability to work with Mist AI.
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