Get Ready to Boost your Prepare for your JN0-251 Exam with 79 Questions [Q11-Q27]

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Get Ready to Boost your Prepare for your JN0-251 Exam with 79 Questions

Use Free JN0-251 Exam Questions that Stimulates Actual EXAM

NEW QUESTION # 11
The status of user authentication will affect which pair of SLEs?

  • A. Time to Connect and Throughput
  • B. Successful Connects and Time to Connect
  • C. Capacity and Successful Connects
  • D. Coverage and Roaming

Answer: B


NEW QUESTION # 12
Which administrator role is based on a timed grace period for Mist site and AP configuration access?

  • A. Helpdesk
  • B. Observer
  • C. Network Admin
  • D. Installer

Answer: D


NEW QUESTION # 13
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 the ceiling
  • D. with the LED facing a wall

Answer: B

Explanation:
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.


NEW QUESTION # 14
Which two APIs are supported by Mist? (Choose two.)

  • A. REST
  • B. SOAP
  • C. Webhook
  • D. gRPC

Answer: A,B


NEW QUESTION # 15
When would be the earliest opportunity to configure an access point (AP)?

  • A. after the AP is claimed to inventory
  • B. after you are on the same network as the AP
  • C. after the AP is installed
  • D. after the AP is online

Answer: C


NEW QUESTION # 16
What are three alert levels used in the Mist UI? (Choose three.)

  • A. informational
  • B. error
  • C. warning
  • D. notice
  • E. critical

Answer: C,D,E


NEW QUESTION # 17
Which two domains comprise artificial intelligence (AI)? (Choose two.)

  • A. SIEM
  • B. deep learning
  • C. machine learning
  • D. virtualization

Answer: B,C

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 # 18
Which two statements are correct about microservices? (Choose two.)

  • A. Each microservice uses the same virtual hardware.
  • B. A microservice can be added without system downtime.
  • C. A microservice can be updated without system downtime.
  • D. All microservices can be updated at the same time without downtime.

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 # 19
Which Mist location-based feature would be used for wayfinding?

  • A. Wi-Fi 6
  • B. vBLE Engagement
  • C. Asset Visibility
  • D. Wi-Fi Location

Answer: B

Explanation:
The Mist location-based feature that would be used for wayfinding is the vBLE Engagement. This feature leverages the directional virtual Bluetooth Low Energy (vBLE) arrays in the Mist Access Points to provide accurate and scalable indoor location services. The vBLE Engagement feature enables use cases such as wayfinding, proximity notifications, asset tracking, and analytics.
Wayfinding is the ability to guide users to their desired destination within an indoor environment, such as a mall, airport, hospital, or campus. Wayfinding requires a mobile app that integrates the Mist SDK and a floor plan that defines the wayfinding paths. The app can show the user's current location as a blue dot on the map and provide turn-by-turn navigation instructions based on the user's destination.


NEW QUESTION # 20
How does Mist detect rogue APs?

  • A. by using the AP's third dedicated radio
  • B. by using Radio Resource Management (RRM)
  • C. by using the AP's 5 GHz radio band
  • D. by using the AP's 2.4 GHz radio band

Answer: A


NEW QUESTION # 21
Which characteristic describes Mist's cloud software architecture?

  • A. microservices based
  • B. controller based
  • C. monolithic code
  • D. shard based

Answer: A


NEW QUESTION # 22
The status of user authentication will affect which pair of SLEs?

  • A. Successful Connects and Time to Connect
  • B. Capacity and Successful Connects
  • C. Time to Connect and Throughput
  • D. Coverage and Roaming

Answer: B


NEW QUESTION # 23
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 the ceiling
  • D. with the LED facing a wall

Answer: B


NEW QUESTION # 24
Which two SLEs report DHCP problems? (Choose two.)

  • A. Capacity
  • B. Throughput
  • C. Successful Connects
  • D. Time to Connect

Answer: C,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 # 25
Which two categories are included in the Connectivity Marvis Action? (Choose two.)

  • A. Bad Cable
  • B. Offline AP
  • C. DNS Failure
  • D. ARP Failure

Answer: A,B

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 # 26
A Mist mesh network supports up to how many hops?

  • A. 2 hops
  • B. 4 hops
  • C. 3 hops
  • D. 1 hop

Answer: B


NEW QUESTION # 27
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