2023年最新の有効なJN0-251テスト解答とJuniper試験PDF問題を試そう
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JNCIA-MistAIの認定を取得することにより、候補者はMist AIソリューションの設定と管理、および高度な分析ツールを使用してネットワーク問題をトラブルシューティングするために必要なスキルを持っていることを示します。この認定は、ネットワークの管理を簡素化し、エンドユーザーの体験を改善するためにクラウドベースの自動化プラットフォームを利用したいネットワーキングの専門家に最適です。 JNCIA-MistAI認定は、Juniper Networks Certified Specialist Mist AI（JNCIS-MistAI）およびJuniper Networks Certified Expert Mist AI（JNCIE-MistAI）などの上級認定へのステップストーンとしても機能します。
質問 # 42
Besides providing AP configuration status, for which other purpose is the LED used in the location design phase?
- A. frequency selection
- B. height orientation
- C. channels in use
- D. antenna orientation
正解：D
解説：
According to the web search results, the LED on a Mist AP can be used for antenna orientation in the location design phase, besides providing AP configuration status. The location design phase is the process of planning and deploying a wireless network that can provide accurate and reliable location services, such as indoor positioning, wayfinding, or asset tracking1. Antenna orientation is an important factor that affects the performance and accuracy of location services, as it determines the coverage and signal strength of the APs2.
The LED on a Mist AP can be used to indicate the antenna orientation by showing different colors and patterns depending on the angle of the AP3. For example, a blue LED means that the AP is facing down, a green LED means that the AP is tilted at 45 degrees, and a red LED means that the AP is facing up3. By using the LED as a guide, the network installer can easily adjust the angle of the AP to achieve the optimal coverage and location accuracy3. The LED can also be controlled remotely by using the Mist AI app or the Mist portal3.
Therefore, based on the web search results, the LED on a Mist AP can be used for antenna orientation in the location design phase, besides providing AP configuration status. This feature can help improve the quality and efficiency of location services in various scenarios, such as retail, hospitality, or healthcare1.
質問 # 43
How does Mist detect rogue APs?
- A. by using the AP's 2.4 GHz radio band
- B. by using the AP's third dedicated radio
- C. by using Radio Resource Management (RRM)
- D. by using the AP's 5 GHz radio band
正解：B
解説：
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.
質問 # 44
What is a Mist Coverage SLE based upon?
- A. an average of client data
- B. a summary of user minutes
- C. an average across APs
- D. a summary of switch data
正解：D
質問 # 45
What is a feature within Mist AI that uses unsupervised machine learning?
- A. Service Level Expectations
- B. vBLE engagement
- C. Alerting
- D. Insights
正解：D
質問 # 46
In which two Mist configuration levels would you create labels? (Choose two.)
- A. organization
- B. site
- C. switch
- D. location
正解：A、B
解説：
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.
質問 # 47
Which Marvis Action category will detect a bad cable based on information and behavior of a single AP?
- A. Layer 1
- B. AP
- C. Connectivity
- D. Switch
正解：A
質問 # 48
You want to obtain detailed information on a wireless client.
In this scenario, which area would you use to accomplish this task?
- A. SLEs
- B. Security
- C. Insights
- D. Templates
正解：C
質問 # 49
Which statement is correct about Bluetooth and BLE?
- A. Bluetooth and BLE are compatible.
- B. Bluetooth and BLE use the same radio channels.
- C. BLE is a newer technology than Bluetooth.
- D. BLE is an upgrade to Bluetooth.
正解：C
質問 # 50
What is the minimum administrator role needed to invite a user to be an administrator of an organization?
- A. helpdesk
- B. super user
- C. network admin
- D. installer
正解：B
解説：
The minimum administrator role needed to invite a user to be an administrator of an organization is the super user role. The super user role has read/write access to the entire organization and can manage all aspects of the organization, including inviting and assigning administrator roles to other users. To invite a user to be an administrator of an organization, the super user can navigate to Organization > Administrators and select Invite Administrator. Then, the super user can enter the name and email address of the user and choose an administrator role for them.
質問 # 51
Which statement is correct about Marvis Actions?
- A. It automatically issues an RMA for an AP.
- B. It summarizes user trouble tickets and detected AP problems.
- C. It summarizes all of the misconfigured WLANs at a site.
- D. It automatically detects and reports network problems.
正解：D
解説：
Reference:
According to the web search results, Marvis Actions is a feature that automatically detects and reports network problems that affect the user experience in an organization1. Marvis Actions uses the Mist AI to identify the root cause of issues and provide recommended solutions or automated fixes1. Marvis Actions can provide insight into issues across the wired, WAN, and wireless networks, at the managed service provider (MSP) level, organization level, and site level1. Marvis Actions can help network administrators monitor, troubleshoot, and optimize their network by providing real-time and historical data and analytics1.
質問 # 52
How should APs be deployed for location-based services (LBS)?
- A. with the AP mounted on a wall
- B. with the LED facing the floor
- C. with the LED facing a wall
- D. with the LED facing the ceiling
正解：A
質問 # 53
In which two Mist configuration levels would you create labels? (Choose two.)
- A. organization
- B. site
- C. switch
- D. location
正解：A、B
質問 # 54
Which two statements about the Mist UI are true? (Choose two.)
- A. It can initiate a packet capture on cloud uplink.
- B. It can initiate a wireless packet capture.
- C. It can initiate a wired packet capture.
- D. It can initiate a BLE packet capture.
正解：B、C
解説：
Reference:
According to the official Mist documentation1, wireless packet captures are helpful when trying to dissect and dig down into the root cause of any wireless issue between a client and AP. You can determine if packets being sent are actually reaching their destination as well as identify if packets are corrupted. With the enhanced packet capture flow, Mist also introduced the ability to capture packets on the wired side of your network as well. This data is captured from the Eth0 port of your AP, and will examine the packets between the AP and the rest of your wired network. This includes any RADIUS, DHCP, or DNS servers you have set up.
The Mist UI does not support BLE packet capture or packet capture on cloud uplink.
質問 # 55
The status of user authentication will affect which pair of SLEs?
- A. Capacity and Successful Connects
- B. Time to Connect and Throughput
- C. Coverage and Roaming
- D. Successful Connects and Time to Connect
正解：A
質問 # 56
How should APs be deployed for location-based services (LBS)?
- A. with the LED facing the floor
- B. with the AP mounted on a wall
- C. with the LED facing a wall
- D. with the LED facing the ceiling
正解：A
解説：
The correct answer is A. with the LED facing the floor. This is because the Juniper Mist APs have a built-in vBLE antenna array that is used for location-based services. The vBLE antenna array is located on the side of the AP with the LED, and it should face the floor for optimal coverage and accuracy1. The AP should also be mounted on the ceiling, not on a wall, to avoid interference and signal loss1.
質問 # 57
Which two APIs are supported by Mist? (Choose two.)
- A. Webhook
- B. REST
- C. SOAP
- D. gRPC
正解：A、B
質問 # 58
Which administrator role must you have to view audit logs?
- A. Observer
- B. Network Admin
- C. Installer
- D. Super User
正解：B
解説：
According to the web search results, the administrator role that you must have to view audit logs is Network Admin. Audit logs are records of the actions and changes that occur on the Mist platform, such as configuration updates, firmware upgrades, device claims, or user logins1. Audit logs can help network administrators monitor, troubleshoot, and audit their network by providing information such as the date, time, user, site, device, and description of each action1.
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 Installer2. Each type of role has different read and write capabilities for the organization and its sites2. Network Admin is one of the roles that can view audit logs, as it has limited read/write access to all sites under the organization and can access organization-level features such as Audit Logs and Inventory2. Network Admin can also open/update support tickets from the GUI2.
質問 # 59
The Mist help menu provides direct access to which two features? (Choose two.)
- A. feature updates
- B. firmware updates
- C. company updates
- D. hardware updates
正解：A、B
解説：
According to the web search results, the Mist help menu provides direct access to feature updates and firmware updates, among other options. Feature updates are weekly updates that show the new features and enhancements that are added to the Mist platform1. Firmware updates are software updates that show the latest firmware versions for different Mist devices, along with the release notes and the features they support2. You can access these options from the Support Tickets and Documentation menu in the Mist GUI12. You can also use the ? mark in the upper right of the UI to see the latest firmware and previous production releases2.
質問 # 60
Which statement is correct regarding settings at the organizational level?
- A. The organizational level is where you specify information about each AP's placement.
- B. The organizational level is where you specify customer-level global details.
- C. The organizational level is where you define each location's specific information.
- D. The organizational level is where you enable BLE capabilities, if you have a license.
正解：C
質問 # 61
You are inviting a new administrator into a Mist organization.
In this scenario, which two roles are valid? (Choose two.)
- A. Network Admin
- B. System Admin
- C. Standard
- D. Helpdesk
正解：A、D
解説：
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.
質問 # 62
Which characteristic describes Mist's cloud software architecture?
- A. controller based
- B. shard based
- C. microservices based
- D. monolithic code
正解：C
質問 # 63
You are asked to bring Mist APs online for your organization.
In this situation, which port must be allowed on your company's firewall for AP access to the Mist cloud?
- A. UDP/22
- B. TCP/443
- C. UDP/1812
- D. TCP/80
正解：B
解説：
Reference:
According to the web search results, TCP/443 is the port that must be allowed on your company's firewall for AP access to the Mist cloud. TCP/443 is the port that is used for HTTPS, which is a secure version of HTTP that encrypts the data sent between the client and the server1. Mist APs use HTTPS to communicate with the Mist cloud and receive their configuration, firmware, and policies2. TCP/443 is also the port that is used for ep-terminator, which is a service that provides encrypted tunneling between Mist APs and the Mist cloud3. Therefore, TCP/443 is the port that must be allowed on your company's firewall for AP access to the Mist cloud.
質問 # 64
What is a Mist Coverage SLE based upon?
- A. an average of client data
- B. a summary of switch data
- C. an average across APs
- D. a summary of user minutes
正解：D
質問 # 65
Which statement defines the total user minutes?
- A. The total number of minutes for which Mist has statistics for each client.
- B. The total amount of device uptime over the last seven days.
- C. The total number of minutes between a client's last association and disassociation.
- D. The average number of minutes that all clients have been associated to the network.
正解：A
解説：
According to the web search results, the statement that defines the total user minutes is the total number of minutes for which Mist has statistics for each client. Total user minutes is a metric that measures the amount of time that clients are connected to the wireless network and have data available for analysis1. Total user minutes is calculated by summing up the number of minutes that each client is associated to the network and has statistics collected by Mist1. Total user minutes can be used to evaluate the network performance, user experience, and service level expectations (SLEs) of the wireless network1.
質問 # 66
You are asked to bring Mist APs online for your organization.
In this situation, which port must be allowed on your company's firewall for AP access to the Mist cloud?
- A. UDP/22
- B. TCP/443
- C. UDP/1812
- D. TCP/80
正解：B
質問 # 67
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