2025年最新の認定サンプル問題JN0-451問題集と練習試験合格させます
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Juniper JN0-451（Mist AI-スペシャリスト（JNCIS-Mistai））試験は、JuniperのMist AIプラットフォームの実装と管理におけるIT専門家のスキルと知識を検証するために設計された認定プログラムです。この認定は、ネットワーク運用、エンジニアリング、およびアーキテクチャの役割で働いており、クラウドネットワーキングと自動化の専門知識を強化したい専門家向けです。
質問 # 39
Which two terms correctly describe transmissions over Wi-Fi? (Choose two.)
- A. half-duplex
- B. point-to-point medium
- C. full-duplex
- D. shared medium
正解：C、D
質問 # 40
You are deploying multiple Mist APs across many sites in your network. You must ensure that you apply consistent WxLAN and WLAN policies across all sites within the same organization.
Which configuration object should be used to accomplish this behavior?
- A. site labels
- B. a device profile
- C. an RF template
- D. a config template
正解：C
質問 # 41
Click the Exhibit button.
Referring to the exhibit, which percentage of connection attempts failed on the access point named LD_RS_Support?
- A. 0
- B. 1
- C. 2
- D. 3
正解：A
解説：
Explanation
63% of connection attempts failed on the access point named LD_RS_Support.
質問 # 42
Click the Exhibit button.
Referring to the exhibit, what would a guest user be able to do?
- A. Use Gmail and Slack.
- B. Use the HP Printer and Internet.
- C. Use the Internet, except for Gmail and Slack.
- D. Use only the Intranet.
正解：C
解説：
Explanation
A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It typically establishes a barrier between a trusted internal network and an untrusted external network, such as the Internet .
質問 # 43
A user with a PSK calls you and says, "The Wi-Fi worked for a week and now it does not work." There have not been any recent configuration changes to the network. You suspect that a time-based setting has reset the key.
In this scenario, where would you begin troubleshooting?
- A. Organization-level Pre-Shared Keys
- B. WLAN-level Pre-Shared Keys
- C. Site-level Pre-Shared Keys
- D. RADIUS Pre-Shared Keys
正解：B
解説：
In this scenario, you would begin troubleshooting by checking the WLAN-level Pre-Shared Keys.
According to the Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide1, you can configure a time-based setting for WLAN-level Pre-Shared Keys (PSKs) that will reset the key after a specified interval. This feature is useful for enhancing security and preventing unauthorized access. If a user reports that the Wi-Fi worked for a week and now it does not work, you should check the WLAN-level PSK settings and see if the key has been changed.
質問 # 44
Referring to the exhibit, what does the security alert indicate?
- A. An AP that is not part of the Mist Org is advertising the same SSIDs as the Mist APs.
- B. An AP that is not part of the Mist Org is operating in the same RF channel as the nearby Mist AP.
- C. An AP that is not part of the Mist Org is launching a DDoS attack on the Mist APs.
- D. An AP that is not part of the Mist Org is connected to the same wired network as the Mist APs.
正解：A
解説：
Reference:
According to the Security Alerts - Mist document, the security alert indicates that an AP that is not part of the Mist Org is advertising the same SSIDs as the Mist APs. This is a type of rogue AP that tries to impersonate a legitimate AP and lure users into connecting to it.
質問 # 45
Regarding roaming, which device determines when it is time to connect to another AP?
- A. the client device
- B. the current AP
- C. the primary AP
- D. the gateway router
正解：A
解説：
Explanation
Regarding roaming, it is ultimately up to the client device to determine when it's time to connect to another AP based on signal strength and other factors such as network congestion or interference. So the correct answer is B. The client device.
質問 # 46
A customer is replacing their previous WLAN controller with a Mist Edge to maintain centralization of user traffic.
How does Mist Edge affect control plane forwarding and data plane forwarding in this scenario?
- A. Control plane forwarding applies to the Mist Cloud and data plane forwarding applies to the Mist Cloud.
- B. Control plane forwarding applies to the Mist Edge and data plane forwarding applies to the Mist Edge.
- C. Control plane forwarding applies to the Mist Edge and data plane forwarding applies to the Mist Cloud.
- D. Control plane forwarding applies to the Mist Cloud and data plane forwarding applies to the Mist Edge.
正解：D
解説：
When a customer replaces their previous WLAN controller with a Mist Edge in order to maintain centralization of user traffic, control plane forwarding applies to the Mist Cloud while data plane forwarding applies to the Mist Edge. So the correct answer is A. Control plane forwarding applies to the Mist Cloud and data plane forwarding applies to the Mist Edge.
質問 # 47
Which two statements are correct about the radio frequency rule of 10s and 3s? (Choose two.)
- A. If the signal strength increases by 3 dB, the power is tripled.
- B. If the signal strength decreases by 10 dB, the power decreases tenfold.
- C. If the signal strength increases by 3 dB, the power is doubled.
- D. If the signal strength decreases by 10 dB, the power is halved.
正解：B、C
解説：
Explanation
According to the radio frequency rule of 10s and 3s, for every loss or gain of 10 dBm, you divide or multiply the power in mW by 10. For every loss or gain of 3 dBm, you divide or multiply the power in mW by 2 1.
https://www.controleng.com/articles/radio-math/
質問 # 48
Which two Mist Aps would be used for BLE location? (Choose two.)
- A. AP12
- B. AP43
- C. AP33
- D. AP32
正解：B、C
解説：
Explanation
P33 and AP43 are Mist APs that can be used for BLE location.
質問 # 49
Click the Exhibit button.
Referring to the exhibit, which percentage of connection attempts failed on the access point named LD_RS_Support?
- A. 0
- B. 1
- C. 2
- D. 3
正解：B
質問 # 50
Which Wireless Assurance SLE provides information on Opportunistic Key Caching (OKC)?
- A. Roaming
- B. Time to Connect
- C. Coverage
- D. Capacity
正解：A
解説：
Reference:
According to the Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide1, the Wireless Assurance SLE that provides information on Opportunistic Key Caching (OKC) is Roaming. OKC is a fast roaming technique that allows wireless clients and the WLAN infrastructure to cache only one PMK for client association with a WLAN, even when roaming between multiple APs.
質問 # 51
Once a client discovers an access point, what is the correct order of steps for successful 802.1X authentication?
- A. Association -> Open System Authentication -> 802.1X Authentication
- B. Open System Authentication -> 802.1X Authentication -> Association
- C. Association -> 802.1X Authentication -> Open System Authentication
- D. Open System Authentication -> Association -> 802.1X Authentication
正解：D
質問 # 52
All the access points (APs) on the site will obtain an IP address for the Management VLAN. You notice an additional IP address for each configured VLAN on the AP.
Which statement is correct in this scenario?
- A. The Local Status Page has been enabled in the AP setting under the Site configuration.
- B. This behavior is enabled by default under the Site configuration.
- C. The AP is configured to support wireless mesh.
- D. The AP MAC has a DHCP reservation.
正解：B
質問 # 53
What is the AP's role in the IEEE 802.1X authentication process?
- A. It acts as an authentication server.
- B. It acts as a supplicant.
- C. It acts as a RADIUS proxy server.
- D. It acts as an authenticator.
正解：D
解説：
In the IEEE 802.1X authentication process, the AP acts as an authenticator.
According to the Lecture 5 - Security - Part 1 document, the AP's role in the IEEE 802.1X authentication process is to act as an authenticator. This means that the AP acts as a gatekeeper between the client device (supplicant) and the RADIUS server (authentication server). The AP forwards authentication messages between the supplicant and the server and grants or denies network access based on the server's response.
質問 # 54
Some users cannot connect to the network. You want to identify these users. In Marvis, which query accomplishes this task?
- A. unhappy clients
- B. troubleshoot access points
- C. list clients
- D. troubleshoot clients
正解：A
解説：
Explanation
If some users cannot connect to the network and you want to identify these users in Marvis, you should use the
"unhappy clients" query.
質問 # 55
You have deployed location services at a site and have installed an application which includes the Mist SDK on Bluetooth-only mobile client devices. The devices with the SDK-enabled app have Bluetooth enabled, but the devices do not appear in the Mist GUI under Clients/App Clients.
What is causing this problem?
- A. The AP BLE radios do not hear the SDK-enabled client's BLE beacons.
- B. The client devices are not connected to Wi-Fi or to a cellular data plan.
- C. The clients are connected to the wrong WLAN.
- D. There is BLE and Wi-Fi co-channel interference.
正解：A
解説：
If Bluetooth-only mobile client devices with an SDK-enabled app do not appear in the Mist GUI under Clients/App Clients even though they have Bluetooth enabled, it could be because the AP BLE radios do not hear the SDK-enabled client's BLE beacons.
According to the Mist documentation1, Mist SDK is a software development kit that enables indoor location and proximity services using Mist's virtual Bluetooth LE (vBLE) technology. The SDK allows mobile applications to communicate with Mist APs using BLE beacons that are transmitted by the client devices.
The devices with the SDK-enabled app have Bluetooth enabled, but they do not appear in the Mist GUI under Clients/App Clients because the AP BLE radios do not hear the SDK-enabled client's BLE beacons. This could be due to various factors such as interference, distance, obstacles, or configuration issues that affect the BLE signal strength and quality.
質問 # 56
Which two statements are correct about channel bonding? (Choose two.)
- A. Bonding two channels together doubles the available bandwidth.
- B. Bonding two channels together doubles the number of available channels.
- C. Bonding two channels together doubles the required device resources.
- D. Bonding two channels together doubles the noise floor.
正解：A、C
解説：
Channel bonding combines two adjacent channels to create a wider channel, effectively doubling the available bandwidth. However, this also doubles the required device resources such as power and processing.
According to the Lecture 3 - Radio Frequency and Antenna Fundamentals - Part 2 document2, channel bonding is a technique that combines two adjacent channels into one wider channel to increase throughput. This doubles the available bandwidth but also doubles the required device resources such as power and processing.
質問 # 57
What is meant when a Marvis Action is shown as "AI Validated"?
- A. Marvis has observed a new issue.
- B. The issue which triggered an alert has been set to Resolved status.
- C. Marvis has observed a recurring issue.
- D. Marvis has observed an issue that is no longer present.
正解：D
質問 # 58
Click the Exhibit button.
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The WLAN with SSID Eero1234 will cause adjacent channel interference.
- B. The WLAN with SSID Bob24WiFi will cause adjacent channel interference.
- C. The WLAN with SSID NETGEAR24 will cause adjacent channel interference.
- D. The WLAN with SSID Verizon-5G_Tuna will cause adjacent channel interference.
正解：B、C
解説：
Explanation
The WLANs with SSIDs NETGEAR24 and Bob24WiFi will cause adjacent channel interference because they are using overlapping channels in the 2.4 GHz frequency band.
質問 # 59
Referring to the exhibit, you asked Marvis to troubleshoot a client. In this scenario, what did Marvis determine?
- A. two DHCP failures today
- B. two authentication failures today
- C. DHCP errors over the past seven days
- D. two authentication failures over this week
正解：B
質問 # 60
Which two statements are correct about channel bonding? (Choose two.)
- A. Bonding two channels together doubles the available bandwidth.
- B. Bonding two channels together doubles the number of available channels.
- C. Bonding two channels together doubles the required device resources.
- D. Bonding two channels together doubles the noise floor.
正解：A、C
解説：
Explanation
Channel bonding combines two adjacent channels to create a wider channel, effectively doubling the available bandwidth. However, this also doubles the required device resources such as power and processing.
質問 # 61
What is the AP's role in the IEEE 802.1X authentication process?
- A. It acts as an authentication server.
- B. It acts as a supplicant.
- C. It acts as a RADIUS proxy server.
- D. It acts as an authenticator.
正解：D
解説：
Explanation
In the IEEE 802.1X authentication process, the AP acts as an authenticator.
質問 # 62
Which Wireless Assurance SLE has classifiers of Association, Authorization, DHCP, and Internet Services?
- A. Time to Connect
- B. Capacity
- C. Coverage
- D. Roaming
正解：B
質問 # 63
Which two statements are correct about the radio frequency rule of 10s and 3s? (Choose two.)
- A. If the signal strength decreases by 10 dB, the power decreases tenfold.
- B. If the signal strength increases by 3 dB, the power is doubled.
- C. If the signal strength increases by 3 dB, the power is tripled.
- D. If the signal strength decreases by 10 dB, the power is halved.
正解：B、C
解説：
質問 # 64
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Juniper JN0-451認定試験は、ワイヤレスネットワーキング業界でキャリアを進めたい個人にとって理想的な選択肢です。この認定試験は、AI駆動の無線ネットワークを展開および管理する専門家のスキルと知識を検証するよう設計されています。この試験は、ネットワークアーキテクチャ、構成およびトラブルシューティング、セキュリティおよびパフォーマンス最適化を含む幅広いトピックをカバーしています。
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