Download Free Juniper JN0-451 Exam Questions & Answer [Q16-Q39]

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The JN0-451 exam tests the candidate's knowledge of the Juniper Mist AI platform, including design, implementation, and troubleshooting of Mist AI solutions. It covers a wide range of topics, including wireless LAN architecture, access point deployment, radio frequency (RF) technologies, network security, and more.

 

NEW QUESTION # 16
Once a client discovers an access point, what is the correct order of steps for successful 802.1X authentication?

  • A. Association -> 802.1X Authentication -> Open System Authentication
  • B. Open System Authentication -> 802.1X Authentication -> Association
  • C. Association -> Open System Authentication -> 802.1X Authentication
  • D. Open System Authentication -> Association -> 802.1X Authentication

Answer: D

Explanation:
Once a client discovers an access point, the correct order of steps for successful 802.1X authentication is Open System Authentication -> Association -> 802.1X Authentication. So the correct answer is D.Open System Authentication -> Association -> 802.1X Authentication.


NEW QUESTION # 17
Which two SLEs measure the amount of time that it takes for a process to complete? (Choose two.)

  • A. roaming
  • B. AP uptime
  • C. time to connect
  • D. throughput

Answer: C,D


NEW QUESTION # 18
You want to identify APs that are not associated with your network. However, the APs broadcast your corporate login page and WLAN name.
What does Mist use to identify APs in this scenario?

  • A. a rogue AP
  • B. a neighbor AP
  • C. an approved AP
  • D. a honeypot AP

Answer: A

Explanation:
Explanation
In a scenario where you want to identify APs that are not associated with your network but broadcast your corporate login page and WLAN name, Mist would use a rogue AP to identify these APs.


NEW QUESTION # 19
Your organization has recently purchased new VoIP handsets. All of the VoIP handsets fail to connect to the corporate WLAN. However, all other devices connect successfully. You expect that there might be a bug with the new handsets. The vendor asks you to provide a pcap file of the handsets' connection attempts.
Which Juniper Mist feature will provide this file?

  • A. Alerts dashboard
  • B. Dynamic Packet Capture
  • C. Clients Insights
  • D. Service Level Expectations

Answer: A

Explanation:
According to the Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide2, Dynamic Packet Capture is a feature that enables capturing packets from a client device and downloading them as a pcap file. This file can be used for troubleshooting purposes or sent to a vendor for analysis.


NEW QUESTION # 20
What are two ways to access Marvis? (Choose two.)

  • A. Use Insights.
  • B. Use the conversational assistant.
  • C. Use config templates.
  • D. Use Actions.

Answer: B,D


NEW QUESTION # 21
You are deploying multiple Mist APs across many sites in your network. You must ensure that you can group similar devices together to easily apply consistent WxLAN policies across multiple sites.
Which configuration object should be used to accomplish this behavior?

  • A. device profile
  • B. radio management
  • C. organization labels
  • D. RF template

Answer: C


NEW QUESTION # 22
Regarding roaming, which device determines when it is time to connect to another AP?

  • A. the current AP
  • B. the gateway router
  • C. the primary AP
  • D. the client device

Answer: D

Explanation:
According to the Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide1, roaming is the process of moving a wireless client device from one AP to another while maintaining network connectivity. The client device determines when it is time to connect to another AP based on its own roaming algorithm and criteria.


NEW QUESTION # 23
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. RADIUS Pre-Shared Keys
  • B. WLAN-level Pre-Shared Keys
  • C. Site-level Pre-Shared Keys
  • D. Organization-level Pre-Shared Keys

Answer: B

Explanation:
Explanation
In this scenario, you would begin troubleshooting by checking the WLAN-level Pre-Shared Keys.


NEW QUESTION # 24
According to the 802.11 standard, how wide are 2.4 GHz band OFDM channels?

  • A. 3 MHz
  • B. 22 MHz
  • C. 5 MHz
  • D. 20 MHz

Answer: D


NEW QUESTION # 25
What are two functions of Mist Radio Resource Management (RRM)? (Choose two.)

  • A. channel assignment
  • B. Ethernet configurations
  • C. transmit power control
  • D. WLAN scheduling

Answer: A,C


NEW QUESTION # 26
Which two SLEs measure the amount of time that it takes for a process to complete? (Choose two.)

  • A. AP uptime
  • B. time to connect
  • C. roaming
  • D. throughput

Answer: B,C

Explanation:
According to the Virtual Network Assistant | Juniper Networks US document3, two SLEs that measure the amount of time that it takes for a process to complete are:
Roaming, which measures how long it takes for a client to switch from one AP to another without losing connectivity.
Time to Connect, which measures how long it takes for a client to complete all steps of network access such as authentication, DHCP, and DNS.


NEW QUESTION # 27
A retail customer has legacy 2.4 GHz scanners that need to connect to the WLAN, but they are not connecting.
Which WLAN data rate setting is required for these devices to connect?

  • A. No Legacy
  • B. Custom Rates
  • C. Compatible
  • D. High Density

Answer: C

Explanation:
The Compatible WLAN data rate setting is required for legacy 2.4 GHz scanners to connect to the WLAN.
According to the Data Rates - Mist document4, the WLAN data rate setting that is required for legacy 2.4 GHz scanners to connect to the WLAN is Compatible. This setting enables all data rates from 1 Mbps to 54 Mbps for both 2.4 GHz and 5 GHz bands. This setting is recommended for legacy devices that need low data rates to connect.


NEW QUESTION # 28
What are two ways to access Marvis? (Choose two.)

  • A. Use Insights.
  • B. Use the conversational assistant.
  • C. Use config templates.
  • D. Use Actions.

Answer: B,D

Explanation:
According to the Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide1, there are two ways to access Marvis, which is a virtual network assistant that provides insights and troubleshooting for wireless networks:
Use the conversational assistant, which allows you to ask natural language questions and get answers from Marvis.
Use Actions, which are predefined queries that you can select from a list and get results from Marvis.


NEW QUESTION # 29
A retail customer has legacy 2.4 GHz scanners that need to connect to the WLAN, but they are not connecting.
Which WLAN data rate setting is required for these devices to connect?

  • A. No Legacy
  • B. Custom Rates
  • C. Compatible
  • D. High Density

Answer: C


NEW QUESTION # 30
According to the Coverage SLE, which classifier tracks a client that transmits at a lower data rate than the AP to which it is connected?

  • A. Asymmetry Uplink
  • B. Wi-Fi Interference
  • C. Asymmetry Downlink
  • D. Slow OKC Roam

Answer: C

Explanation:
According to Coverage SLE, Asymmetry Downlink classifier tracks a client that transmits at lower data rate than AP to which it is connected.So the correct answer is A.Asymmetry Downlink


NEW QUESTION # 31
Which two fields are required when creating a new site? (Choose two.)

  • A. site name
  • B. time zone
  • C. location
  • D. RF template

Answer: A,B

Explanation:
According to the Create a Mist Account and Organization - Mist document1, two fields that are required when creating a new site are:
Site name, which is a unique identifier for the site within the organization.
Time zone, which is used to display the correct time for events and reports related to the site.


NEW QUESTION # 32
You are asked to forward event messages from Mist to an external log collector.
In this scenario, which feature would enable this capability?

  • A. syslog
  • B. SNMP traps
  • C. NETCONF
  • D. webhooks

Answer: D


NEW QUESTION # 33
You are installing and booting up your first Juniper Mist AP at your site.
By default, which two statements are correct in this scenario? (Choose two.)

  • A. The AP will attempt to connect to the Mist cloud using port 8080.
  • B. The AP will attempt to connect to the Mist cloud using port 443.
  • C. The AP will send DHCP requests using the native VLAN.
  • D. The AP will send DHCP requests with a VLAN ID of 10.

Answer: B,C

Explanation:
According to the Initial AP Connection and VLANs & Static IP addresses - Mist document1, when a Juniper Mist AP boots up for the first time, it will expect to see a trunked port or the native VLAN=1 and will send a DHCP request on that VLAN. The AP will attempt to connect to the Mist cloud using port 443, which is the default HTTPS port.


NEW QUESTION # 34
You want to identify APs that are not associated with your network. However, the APs broadcast your corporate login page and WLAN name.
What does Mist use to identify APs in this scenario?

  • A. a rogue AP
  • B. a neighbor AP
  • C. an approved AP
  • D. a honeypot AP

Answer: A


NEW QUESTION # 35
Mist WLAN objects are configurable at which two levels? (Choose two.)

  • A. site group
  • B. access point
  • C. site
  • D. organization

Answer: B,C


NEW QUESTION # 36
Your customer added an Apple TV in their conference room so that employees can easily share their screen. However, the Apple TV cannot be discovered by the employees' devices.
Which two settings are causing the problem? (Choose two.)

  • A. MDNS
  • B. ARP
  • C. Broadcast/Multicast
  • D. Ignore Broadcast SSID Probe Requests

Answer: A,C

Explanation:
If a customer added an Apple TV in their conference room so that employees can easily share their screen but the Apple TV cannot be discovered by the employees' devices, two settings that could be causing this problem are MDNS and Broadcast/Multicast. So the correct answers are A. MDNS and B. Broadcast/Multicast.


NEW QUESTION # 37
Regarding roaming, which device determines when it is time to connect to another AP?

  • A. the current AP
  • B. the gateway router
  • C. the primary AP
  • D. the client device

Answer: D


NEW QUESTION # 38
Which two events are displayed under the Client Events area found on the Insights page? (Choose two.)

  • A. Reflection (Loop Detection)
  • B. Reassociation
  • C. DHCP Denied
  • D. Restart by User

Answer: B,C

Explanation:
Two events that are displayed under Client Events area found on Insights page are Reassociation and DHCP Denied. So the correct answers are A. Reassociation and D. DHCP Denied.


NEW QUESTION # 39
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Taking the Juniper JN0-451 exam is a great way to enhance your career in the IT industry. With the increasing demand for Mist AI solutions, having a certification in this area can make you stand out from the crowd. Mist AI - Specialist (JNCIS-MistAI) certification demonstrates that you have the skills and knowledge to deploy, configure, and troubleshoot Mist AI solutions, which can be a valuable asset to any organization.

 

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