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JN0-451
Mist AI - Specialist (JNCIS-MistAI) Questions and Answers

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Questions # 11:

Click the Exhibit button.

Question # 11

Referring to the exhibit, which percentage of connection attempts failed on the access point named LD_RS_Support?

Options:

Answer

Explanation

The 37% of Successful Connects suggest that 63% failed – however, these are spread between both LD_Testbed_MD and LD_RS_Support. If the only AP with connection issues was LD_RS_Support then the reverse math may have worked.

Questions # 12:

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?

Options:

organization labels

device profile

RF template

radio management

Answer

Explanation

When deploying multiple Mist APs across many sites in your network and grouping similar devices together to easily apply consistent WxLAN policies across multiple sites, you should use device profiles.

Questions # 13:

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.)

Options:

MDNS

Broadcast/Multicast

Ignore Broadcast SSID Probe Requests

ARP

Answer

A, B

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.

Questions # 14:

Which two terms correctly describe transmissions over Wi-Fi? (Choose two.)

Options:

shared medium

half-duplex

full-duplex

point-to-point medium

Answer

A, B

Explanation

Transmissions over Wi-Fi are shared medium and half-duplex.

According to the IEEE 802.11 - Wikipedia document2, two terms that correctly describe transmissions over Wi-Fi are:

Shared medium, which means that multiple devices use the same wireless channel and have to compete for access and avoid collisions.

Half-duplex, which means that devices can either transmit or receive data at a time, but not both simultaneously.

References: https://en.wikipedia.org/wiki/IEEE_802.11

Questions # 15:

When does a Mist AP actually begin transmitting BLE?

Options:

When it is claimed and placed on a site.

When it is placed on a floor plan.

When BLE is enabled at the Organization level.

When BLE is enabled for the AP.

Answer

Explanation

According to the Location - how it works - Mist document1, a Mist AP actually begins transmitting BLE when it is placed on a floor plan. This is because the Mist cloud uses the floor plan information to calculate the optimal BLE transmission pattern for each AP.

References: https://www.mist.com/documentation/location-how-it-works/

Questions # 16:

You receive a Marvis Actions alert informing you that there is a non-compliant AP at one of your sites.

What should you do to correct the problem?

Options:

Request an RMA.

Disconnect the Rogue AP from your Ethernet switch.

Replace the AP with the correct hardware model.

Install the correct version of firmware on the AP.

Answer

Explanation

According to the Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide2, a non-compliant AP is an AP that has a different hardware model than what is expected by the cloud configuration. This can happen when an AP is replaced with an incorrect model or when an AP is moved to a different site group that has a different hardware model requirement. The solution is to replace the AP with the correct hardware model.

References: https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/17-2/config-guide/b_wl_17_2_cg/ap-compliance.html

Questions # 17:

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?

Options:

The AP is configured to support wireless mesh.

This behavior is enabled by default under the Site configuration.

The Local Status Page has been enabled in the AP setting under the Site configuration.

The AP MAC has a DHCP reservation.

Answer

Explanation

According to the Mist documentation1, a Mist AP will pull a management IP address from the Native VLAN by default. However, if the Local Status Page is configured for the Site, all the site APs will pull their own IP address from the Management VLAN, but also addresses for each of the VLANs configured on the AP. This is because each AP creates a Switch Virtual Interface (SVI) for each VLAN on its eth0 interface.

The Local Status Page is a feature that allows you to access information about an AP’s status and configuration through a web browser by connecting to its IP address2. This feature can be enabled or disabled at the site level under Site Settings > Access Points > Advanced Settings.

Questions # 18:

You are the only tenant in a building that has Wi-Fi. At times, the Wi-Fi network appears to be slow and you want to determine if the microwave oven is causing an issue because it is used throughput the day. Which SLE metric and classifier should you look at to determine the issue?

Options:

throughput/network issues

capacity/wifi interference

throughput/coverage

capacity/non-wifi interference

Answer

Explanation

[Reference: https://www.mist.com/documentation/radio-management-event-types/, If you are the only tenant in a building that has Wi-Fi and you want to determine if a microwave oven is causing an issue with the Wi-Fi network appearing slow at times, you should look at the capacity/non-wifi interference SLE metric and classifier., According to the Virtual Network Assistant | Juniper Networks US document, Non-Wi-Fi Interference is a classifier under the Capacity SLE that tracks devices that experience interference from non-Wi-Fi sources such as microwave ovens, cordless phones, or Bluetooth devices. This classifier can help determine if a microwave oven is causing an issue with Wi-Fi performance., References: https://www.juniper.net/us/en/products/cloud-services/virtual-network-assistant.html, , ]

Questions # 19:

The customer wants to broadcast a WLAN at a certain time and day of the week.

Which statement is correct in this scenario?

Options:

Third-party integration is required to achieve this requirement.

Mist supports this function with an additional subscription.

APs need to be upgraded for this feature.

SSID scheduling should be configured.

Answer

Explanation

If a customer wants to broadcast a WLAN at a certain time and day of the week, SSID scheduling should be configured

According to the SSID Scheduling - Mist document1, SSID scheduling is a feature that allows you to customize your WLAN by choosing the exact days and times to broadcast the SSID. This feature can be useful for scenarios where you want to limit the availability of a WLAN to a certain time and day of the week.

References: https://www.mist.com/documentation/ssid-scheduling/

Questions # 20:

What is the impact of adding more SSIDs to a radio?