Verified JN0-251 exam dumps Q&As with Correct 79 Questions and Answers
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NEW QUESTION # 18
Where in the Mist UI would the Persistently Failing Clients report be found?
- A. Marvis Actions
- B. Successful Connects SLE
- C. Insights
- D. Alerts
Answer: C
NEW QUESTION # 19
Which two SLEs report DHCP problems? (Choose two.)
- A. Time to Connect
- B. Throughput
- C. Successful Connects
- D. Capacity
Answer: A,C
Explanation:
According to the [Service Level Expectations] page, Service Level Expectations (SLEs) are a set of metrics that measure the quality and performance of the wireless network from the user's perspective. SLEs can help network administrators monitor, troubleshoot, and optimize their network by providing real-time and historical data and analytics. SLEs can also help network administrators identify and resolve issues before they impact the user experience.
There are seven SLEs that are supported by Mist: Successful Connects, Time to Connect, Capacity, Coverage, Throughput, Roaming, and WAN. Each SLE has a target value and a threshold value that can be customized according to the network requirements. The SLE score is calculated as the percentage of clients that meet or exceed the target value for each SLE.
Two SLEs that report DHCP problems are Successful Connects and Time to Connect. DHCP (Dynamic Host Configuration Protocol) is a protocol that assigns IP addresses and other network configuration parameters to devices on a network. DHCP problems can occur when a device fails to obtain an IP address from the DHCP server or when the DHCP server is slow or unreachable.
Successful Connects is an SLE that measures the percentage of clients that successfully connect to the wireless network within a specified time frame. Successful Connects can report DHCP problems by showing the number of clients that fail to connect due to DHCP errors, such as DHCP timeout, DHCP NAK, or DHCP decline. Successful Connects can also show the root cause analysis and recommended actions for resolving DHCP problems.
Time to Connect is an SLE that measures the average time it takes for a client to connect to the wireless network from the moment it sends a probe request to the moment it receives an IP address from the DHCP server. Time to Connect can report DHCP problems by showing the breakdown of the connection time into different stages, such as probe, auth, assoc, EAPOL, and DHCP. Time to Connect can also show the outliers and trends for each stage and identify if there are any delays or failures in the DHCP process.
NEW QUESTION # 20
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://mist.com/status.
- B. Visit https://support.juniper.net/support/.
- C. Visit https://www.mist.com/support.
- 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 # 21
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. Standard
- D. System Admin
Answer: A,B
NEW QUESTION # 22
Mist has detected a bad cable.
What are two ways that Marvis determined this result? (Choose two.)
- A. It identified a missing VLAN.
- B. It identified network loops.
- C. It identified port flapping.
- D. It identified interface errors.
Answer: C,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 # 23
Which two categories are included in the Connectivity Marvis Action? (Choose two.)
- A. DNS Failure
- B. Offline AP
- C. ARP Failure
- D. Bad Cable
Answer: A,C
NEW QUESTION # 24
Which two statements are correct when managing switches located in a Mist-managed site? (Choose two.)
- A. The site firewall must allow communications from the switch to Mist.
- B. The site must have Mist access points.
- C. A switch template must be assigned to the site.
- D. The switch must be assigned to the site.
Answer: A,D
NEW QUESTION # 25
In a production network, what are two types of security threats? (Choose two.)
- A. scanning radio
- B. rogue AP
- C. neighbor AP
- D. honeypot AP
Answer: A,B
NEW QUESTION # 26
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. Application
- B. AP
- C. Connectivity
- D. Clients
Answer: B
Explanation:
You want to determine where you have coverage issues in your network using Marvis Actions. The Marvis Action category that you should use in this situation is AP. The AP category contains actions that are related to the access points on your network, such as offline APs, health check failed APs, non-compliant APs, and coverage hole APs.
The coverage hole AP action will detect any coverage issues on your site and provide a floorplan visual of the APs on your map experiencing these issues. You can use this visual to find the low coverage spaces identified on your site and make the necessary improvements. You can also view the details of the coverage hole action, such as the number of affected clients, the average RSSI, and the root cause classifier.
To access the AP category of Marvis Actions, you need to navigate to Marvis > Actions and select the AP tab. You will see a list of all the AP actions that are detected on your network. You can filter and sort the actions by various criteria, such as site, severity, status, or date. You can also perform actions on the APs, such as upgrade, RMA, or block.
NEW QUESTION # 27
In which two Mist configuration levels would you create labels? (Choose two.)
- A. organization
- B. location
- C. switch
- D. site
Answer: A,D
NEW QUESTION # 28
What is a feature within Mist AI that uses unsupervised machine learning?
- A. Service Level Expectations
- B. Alerting
- C. Insights
- D. vBLE engagement
Answer: C
Explanation:
Reference:
The correct answer is B. Insights. Insights is a feature within Mist AI that uses unsupervised machine learning to provide network and location analytics. Insights uses data from various sources, such as Juniper Mist Access Points, Switches, Session Smart Routers, and Firewalls, to generate reports and dashboards that show the performance, behavior, and trends of devices, users, and applications in the network1. Insights can also detect anomalies and outliers in the data, such as unusual traffic patterns, device failures, or security incidents1. Insights helps network operators and business owners gain visibility and insight into their network and location operations1.
NEW QUESTION # 29
Which two statements are correct about an Organization ID? (Choose two.)
- A. The Organization ID is randomly created by the system.
- B. The Organization ID is used to identify the organization when using APIs.
- C. The Organization ID is the encrypted version of the Organization Name field.
- D. The Organization ID is manually defined by the user.
Answer: A,B
NEW QUESTION # 30
How should APs be deployed for location-based services (LBS)?
- A. with the LED facing a wall
- B. with the LED facing the floor
- C. with the AP mounted on a wall
- D. with the LED facing the ceiling
Answer: B
NEW QUESTION # 31
Which machine learning method involves rewarding and punishing an agent?
- A. unsupervised learning
- B. deep learning
- C. reinforcement learning
- D. supervised learning
Answer: C
NEW QUESTION # 32
Which two APIs are supported by Mist? (Choose two.)
- A. REST
- B. gRPC
- C. Webhook
- D. SOAP
Answer: A,C
NEW QUESTION # 33
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. the time of the incident
- B. the access point to which the client was connected
- C. the MAC address of the client device
- D. user home address
Answer: A,C
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 # 34
Which statement is correct about Bluetooth and BLE?
- A. Bluetooth and BLE are compatible.
- B. BLE is an upgrade to Bluetooth.
- C. Bluetooth and BLE use the same radio channels.
- D. BLE is a newer technology than Bluetooth.
Answer: C
Explanation:
The correct answer is B. Bluetooth and BLE use the same radio channels. Bluetooth and BLE are both wireless technologies that operate in the 2.4 GHz ISM band1. They use the same 40 channels, each with a bandwidth of 1 MHz2. However, Bluetooth and BLE are not compatible, as they use different protocols and modulation schemes2. BLE is a newer technology than Bluetooth, as it was introduced in 2010 as part of the Bluetooth 4.0 specification3. BLE is designed to be more energy-efficient and suitable for low-power devices that transmit small amounts of data3.
NEW QUESTION # 35
Which two statements are correct about microservices? (Choose two.)
- A. All microservices can be updated at the same time without downtime.
- B. A microservice can be added without system downtime.
- C. A microservice can be updated without system downtime.
- D. Each microservice uses the same virtual hardware.
Answer: B,C
Explanation:
A microservice can be added without system downtime. This is because microservices are independent and loosely coupled components that communicate over well-defined APIs. Adding a new microservice does not affect the functioning of other existing microservices or the overall application. The new microservice can be deployed and integrated seamlessly with the rest of the system1.
A microservice can be updated without system downtime. This is because microservices allow each service to be developed, tested, and deployed independently of other services. Updating a microservice does not require changing or restarting the entire application. The updated microservice can be rolled out gradually or reverted easily if needed2.
NEW QUESTION # 36
Which two categories are included in the Connectivity Marvis Action? (Choose two.)
- A. DNS Failure
- B. Offline AP
- C. ARP Failure
- D. Bad Cable
Answer: B,D
Explanation:
These are two categories that are included in the Connectivity Marvis Action. The Connectivity Marvis Action lists the network issues that affect the connectivity of devices, users, or applications in the Juniper Mist cloud. The Offline AP category shows the APs that are offline or unreachable by the Juniper Mist cloud. The Bad Cable category shows the switches or APs that have bad cables or ports1. The other two categories, C. ARP Failure and D. DNS Failure, are not part of the Connectivity Marvis Action, but they are part of the Network Services Marvis Action. The Network Services Marvis Action lists the network issues that affect the network services such as DHCP, DNS, ARP, and NTP1.
NEW QUESTION # 37
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Juniper JN0-251 (Mist AI, Associate (JNCIA-MistAI)) Certification Exam is designed for individuals who want to validate their knowledge and skills in using Juniper Mist AI technology. JN0-251 exam is ideal for IT professionals who are looking to enhance their expertise in network automation, AI-driven operations, and troubleshooting techniques using the Juniper Mist platform. JN0-251 exam covers a wide range of topics, including network design, deployment, configuration, and management, as well as advanced troubleshooting using Juniper Mist AI technology.
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