JN0-251 Exam Info and Free Practice Test Professional Quiz Study Materials
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Earning the JN0-251 certification demonstrates to employers and clients that you have the knowledge and skills to deploy, configure, and manage the Mist AI platform. Mist AI, Associate (JNCIA-MistAI) certification can help you advance your career as a network engineer or administrator, and may lead to new job opportunities and higher salaries. If you are interested in AI-based networking solutions and want to validate your knowledge and skills in this area, the JN0-251 certification is an excellent option to consider.
Juniper JN0-251 exam is an essential certification for network engineers and administrators who work with Juniper Mist AI wireless technologies. Mist AI, Associate (JNCIA-MistAI) certification validates the skills and knowledge required to design, deploy, and troubleshoot wireless networks using Juniper Mist AI technologies. It is an excellent way for network engineers and administrators to demonstrate their expertise in wireless networking.
NEW QUESTION # 32
Which two domains comprise artificial intelligence (AI)? (Choose two.)
- A. machine learning
- B. deep learning
- C. virtualization
- D. SIEM
Answer: A,B
Explanation:
Reference:
machine learning and deep learning are two domains that comprise artificial intelligence (AI). AI is the ability of a computer or a robot to perform tasks that normally require human intelligence, such as reasoning, learning, or problem-solving1. AI can be applied to various fields and industries, such as healthcare, finance, education, and entertainment1.
Machine learning is a subset of AI that enables computers to learn from data and experience without being explicitly programmed2. Machine learning uses algorithms and statistical models to analyze data and find patterns, correlations, or predictions2. Machine learning can be used for various tasks, such as image recognition, natural language processing, recommender systems, or fraud detection2.
Deep learning is a subset of machine learning that uses artificial neural networks to mimic the structure and function of the human brain3. Deep learning can process large amounts of complex and unstructured data, such as images, videos, or texts3. Deep learning can be used for various tasks, such as face recognition, speech recognition, natural language generation, or self-driving cars3.
NEW QUESTION # 33
What is an 802.11 management frame transmitted by an AP?
- A. beacon
- B. echo request
- C. keepalive
- D. ping
Answer: A
NEW QUESTION # 34
Which Marvis Action category will detect a bad cable based on information and behavior of a single AP?
- A. AP
- B. Layer 1
- C. Switch
- D. Connectivity
Answer: C
Explanation:
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.
NEW QUESTION # 35
What are three alert levels used in the Mist UI? (Choose three.)
- A. notice
- B. error
- C. informational
- D. warning
- E. critical
Answer: A,D,E
NEW QUESTION # 36
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 the AP's 5 GHz radio band
- D. by using Radio Resource Management (RRM)
Answer: C
NEW QUESTION # 37
Which two SLEs report DHCP problems? (Choose two.)
- A. Capacity
- B. Time to Connect
- C. Throughput
- D. Successful Connects
Answer: B,D
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 # 38
Which Marvis Action category will detect a bad cable based on information and behavior of a single AP?
- A. AP
- B. Layer 1
- C. Switch
- D. Connectivity
Answer: B
NEW QUESTION # 39
Which statement is correct about Mist SLEs?
- A. A Mist classifier is comprised of a single SLE.
- B. A Mist SLE is comprised of multiple classifiers.
- C. A Mist classifier is comprised of multiple SLEs.
- D. A Mist SLE is comprised of a single classifier.
Answer: A
NEW QUESTION # 40
Which characteristic describes Mist's cloud software architecture?
- A. controller based
- B. shard based
- C. monolithic code
- D. microservices based
Answer: D
Explanation:
Reference:
The correct answer is A. microservices based. This is the characteristic that describes Mist's cloud software architecture. Mist's cloud software architecture is based on microservices, which are small, independent, and loosely coupled software components that communicate with each other through APIs1. Microservices allow for faster development, deployment, scaling, and maintenance of cloud applications, as well as improved reliability, performance, and security1. Mist's cloud software architecture leverages microservices to provide AI-driven network management and operations, as well as innovative features such as vBLE engagement, Marvis Virtual Network Assistant, and Wi-Fi Assurance2.
NEW QUESTION # 41
You want to review client information about a specific AP.
In this scenario, where in the UI would you look?
- A. Access Points
- B. SLEs
- C. Client Insights
- D. AP Insights
Answer: A
Explanation:
If you want to review client information about a specific AP, you can go to the Access Points page in the Mist UI. The Access Points page shows a list of all the APs that are managed by your site, along with their status, model, firmware, location, and other details1. You can also use the search bar or the filter options to find a specific AP by its name, MAC address, serial number, or tag1.
By clicking on an AP from the list, you can access the AP Details page, which shows more information about the AP, such as its configuration, events, alerts, and insights2. On the AP Details page, you can also see the client information about the AP by clicking on the Clients tab2. The Clients tab shows a list of all the clients that are associated with the AP, along with their status, MAC address, IP address, hostname, role, SSID, VLAN, and other details2. You can also use the search bar or the filter options to find a specific client by its name, MAC address, IP address, or tag2.
By clicking on a client from the list, you can access the Client Details page, which shows more information about the client, such as its connection history, events, alerts, and insights3. On the Client Details page, you can also see the performance metrics of the client, such as its signal strength, data rate, latency, packet loss, throughput, and SLE scores3. You can also use the Troubleshoot button to launch Marvis virtual network assistant and get answers to your questions about the client3.
Therefore, if you want to review client information about a specific AP in the Mist UI, you can look at the Access Points page and then navigate to the AP Details page and the Clients tab.
NEW QUESTION # 42
Which two SLEs report DHCP problems? (Choose two.)
- A. Capacity
- B. Time to Connect
- C. Throughput
- D. Successful Connects
Answer: B,D
NEW QUESTION # 43
Besides providing AP configuration status, for which other purpose is the LED used in the location design phase?
- A. channels in use
- B. frequency selection
- C. antenna orientation
- D. height orientation
Answer: C
NEW QUESTION # 44
Which two methods are supported for configuring a Mist environment? (Choose two.)
- A. Use the GUI.
- B. Use the CLI.
- C. Use NETCONF.
- D. Use the API.
Answer: A,D
Explanation:
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.
NEW QUESTION # 45
Which device categories are included in WAN Assurance? (Choose two.)
- A. EX
- B. SRX
- C. SSR
- D. Mist Edge
Answer: A,B
NEW QUESTION # 46
What are two characteristics of the 2.4 GHz band when compared to the 5 GHz band? (Choose two.)
- A. more congestion
- B. lower frequency
- C. shorter wavelength
- D. less non-Wi-Fi interference
Answer: A,B
Explanation:
Reference:
The correct answer is B. lower frequency and D. more congestion. These are two characteristics of the 2.4 GHz band when compared to the 5 GHz band. The 2.4 GHz band uses lower frequencies than the 5 GHz band, which means that it can penetrate solid objects better and have more range1. However, the lower frequencies also mean that the 2.4 GHz band has less bandwidth and speed than the 5 GHz band1. The 2.4 GHz band is also more congested than the 5 GHz band, as it has fewer non-overlapping channels and more interference from other devices and routers that use the same frequency band23. The 5 GHz band, on the other hand, has more non-overlapping channels and less interference, which makes it faster and more reliable23.
NEW QUESTION # 47
A Mist mesh network supports up to how many hops?
- A. 3 hops
- B. 4 hops
- C. 2 hops
- D. 1 hop
Answer: B
NEW QUESTION # 48
Which location mode is required to track BLE badges?
- A. BLE asset visibility
- B. vBLE Engagement
- C. wayfinding
- D. Wi-Fi location
Answer: A
NEW QUESTION # 49
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The JNCIA-MistAI exam is a vendor-specific certification, which means that it focuses on Juniper's Mist AI technology exclusively. This technology is an AI-driven wireless platform that leverages machine learning algorithms to provide a more intuitive and automated wireless network experience. JN0-251 exam covers topics such as Mist AI fundamentals, design considerations, deployment and management, troubleshooting, and more.
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