2024年最新の実際のJN0-251問題集最新Juniper練習テスト問題集ゲット
JN0-251問題集PDFでJN0-251リアル試験問題解答
質問 # 27
Which Marvis Action category will detect a bad cable based on information and behavior of a single AP?
- A. Layer 1
- B. Switch
- C. Connectivity
- D. AP
正解：B
解説：
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.
質問 # 28
You want to obtain detailed information on a wireless client.
In this scenario, which area would you use to accomplish this task?
- A. Templates
- B. Insights
- C. SLEs
- D. Security
正解：B
解説：
The area that you would use to obtain detailed information on a wireless client is the Insights area. The Insights area provides a comprehensive view of the wireless network performance and user experience, including the client dashboard, the live view, the service-level expectations (SLEs), and the Marvis virtual network assistant.
The client dashboard allows you to view and search for individual wireless clients and see their connection details, such as device type, MAC address, IP address, SSID, AP name, signal strength, throughput, data usage, location, and more. You can also perform actions on the clients, such as block, unblock, or capture packets.
The live view allows you to monitor the real-time status and activity of the wireless network and clients. You can see the number of connected clients, the traffic volume, the SLE scores, the top APs and SSIDs, and more. You can also filter and drill down into specific clients, APs, SSIDs, or sites.
The SLEs allow you to define and measure the quality of service and user experience for the wireless network. You can set thresholds and goals for key metrics, such as throughput, coverage, capacity, roaming, uptime, and WAN. You can also receive alerts and recommendations when the SLEs are violated.
The Marvis virtual network assistant allows you to interact with the wireless network using natural language commands. You can ask questions, troubleshoot issues, perform actions, and get insights from Marvis. For example, you can ask Marvis to show you the details of a wireless client or to explain why a client had a poor connection.
質問 # 29
How does Mist detect rogue APs?
- A. by using Radio Resource Management (RRM)
- B. by using the AP's 2.4 GHz radio band
- C. by using the AP's 5 GHz radio band
- D. by using the AP's third dedicated radio
正解：D
質問 # 30
What are two prerequisites for adopting Juniper switches for Wired Assurance? (Choose two.)
- A. an activation code
- B. a Wired Assurance license
- C. a claim code
- D. an account on manage.mist.com
正解：B、D
解説：
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.
質問 # 31
Which two domains comprise artificial intelligence (AI)? (Choose two.)
- A. virtualization
- B. SIEM
- C. machine learning
- D. deep learning
正解：C、D
解説：
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.
質問 # 32
Under ideal conditions, which frequency band will have the farthest usable range?
- A. 900 MHz
- B. 5 GHz
- C. 2.4 GHz
- D. 6 GHz
正解：A
解説：
Reference:
The correct answer is A. 900 MHz. This is the frequency band that will have the farthest usable range under ideal conditions. The range of a wireless signal depends on several factors, such as the transmit power, the antenna gain, the receiver sensitivity, the propagation environment, and the interference level1. However, in general, lower frequency signals can travel farther than higher frequency signals, as they have less attenuation (signal loss) and can penetrate solid objects better2. The 900 MHz band is a lower frequency band than the 2.4 GHz, 5 GHz, and 6 GHz bands, which are commonly used for Wi-Fi and other wireless technologies3. Therefore, the 900 MHz band will have the farthest usable range under ideal conditions. However, the 900 MHz band also has less bandwidth and speed than the higher frequency bands, as well as more interference from other devices that use the same band3. Therefore, the 900 MHz band may not be suitable for some wireless applications that require high data rates or low latency.
質問 # 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 access point to which the client was connected
- B. the time of the incident
- C. user home address
- D. the MAC address of the client device
正解：B、D
質問 # 34
What is the minimum administrator role needed to invite a user to be an administrator of an organization?
- A. network admin
- B. installer
- C. helpdesk
- D. super user
正解：D
質問 # 35
Which two categories are included in the Connectivity Marvis Action? (Choose two.)
- A. Offline AP
- B. ARP Failure
- C. Bad Cable
- D. DNS Failure
正解：B、D
質問 # 36
What is an advantage of using the Juniper Mist cloud compared to traditional on-premises WLAN controllers?
- A. Machine learning occurs through microservices.
- B. More robust AP encryption occurs.
- C. The ability to configure Mist cloud using any connected AP.
- D. Mist updates occur daily.
正解：A
解説：
The Juniper Mist cloud delivers a modern microservices cloud architecture to meet your digital transformation goals for the AI-Driven Enterprise1. Machine learning is one of the key technologies that enables the cloud to automate key tasks and proactively address networking issues before they impact the quality-of-service levels2. Microservices are a way of designing software applications as a collection of independently deployable, small, modular services, each running a unique process and communicating through APIs3. This allows for faster and more scalable development, deployment, and maintenance of cloud services.
質問 # 37
Which statement is correct about Mist SLEs?
- A. A Mist SLE is comprised of multiple classifiers.
- B. A Mist classifier is comprised of multiple SLEs.
- C. A Mist classifier is comprised of a single SLE.
- D. A Mist SLE is comprised of a single classifier.
正解：A
解説：
Reference:
The correct statement about Mist SLEs is that a Mist SLE is comprised of multiple classifiers. A Mist SLE, or Service Level Expectation, is a metric that tracks the percentage of time that a specific network condition is met within a given time range. A Mist classifier is a sub-metric that identifies the root cause of the network condition or issue. For example, the Throughput SLE measures the percentage of time that the wireless clients have an estimated throughput above the threshold configured by the network administrator. The Throughput SLE has four classifiers: Coverage, Network Issues, Device Capacity, and Capacity. Each classifier indicates a possible reason for low throughput, such as poor signal strength, interference, device limitations, or high bandwidth utilization12.
質問 # 38
Which location mode is required to track BLE badges?
- A. BLE asset visibility
- B. vBLE Engagement
- C. Wi-Fi location
- D. wayfinding
正解：A
質問 # 39
Mist has detected a bad cable.
What are two ways that Marvis determined this result? (Choose two.)
- A. It identified network loops.
- B. It identified a missing VLAN.
- C. It identified port flapping.
- D. It identified interface errors.
正解：C、D
解説：
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.
質問 # 40
Which statement is correct about Mist SLEs?
- A. A Mist SLE is comprised of multiple classifiers.
- B. A Mist classifier is comprised of multiple SLEs.
- C. A Mist classifier is comprised of a single SLE.
- D. A Mist SLE is comprised of a single classifier.
正解：A
質問 # 41
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 access point to which the client was connected
- B. the time of the incident
- C. user home address
- D. the MAC address of the client device
正解：B、D
解説：
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.
質問 # 42
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JN0-251試験 [2024] 問題集でJuniperのPDF問題：https://drive.google.com/open?id=1tnqUE7qk1FUXwezEhCZF6Ac7fSK1tDb1