Juniper JN0-251 Mist AI, Associate Exam JNCIA-MistAI Exam Practice Test

Answer : B

Answer : B

The correct answer is B. 2 hops.A Mist mesh network supports up to two hops between the root AP and the leaf AP1. A mesh network is a wireless network that allows APs to communicate with each other without a wired connection. The root AP is the AP that has a wired connection to the network, and the leaf AP is the AP that connects to the root AP or another leaf AP wirelessly. A hop is the number of wireless links between the root AP and the leaf AP.A Mist mesh network can have up to two hops, meaning that a leaf AP can connect to another leaf AP that is one hop away from the root AP1.This allows for more flexibility and coverage in areas where wired connections are not available or feasible1.

1:Mist Mesh Network

Answer : A

According to the web search results, Mist AP packet capture is a feature that allows you to capture packets from a specific AP or client and analyze them using a tool such as Wireshark1.Packet capture can help you troubleshoot and diagnose various wireless issues, such as DHCP errors, authentication failures, or roaming problems1.You can configure a wired or wireless packet capture manually by using the Mist portal or the Mist AI app23.

To configure a wired packet capture manually, you can go to Network > Packet Captures in the Mist portal and select the AP and the TCP dump expression that you want to capture packets for2.The TCP dump expression is a filter that specifies the type, source, destination, and port of the packets that you want to capture2.You can use the TCP dump expression builder to create your expression or edit it directly if you are familiar with the syntax2.You can also adjust the packet capture settings, such as the number of packets, duration, and maximum packet length2.Once you start the capture, you can download the PCAP file and open it in Wireshark for analysis2.

To configure a wireless packet capture manually, you can go to Network > Packet Captures in the Mist portal and select the AP and the WLAN that you want to capture packets for3.You can also adjust the packet capture settings, such as the number of packets, duration, and maximum packet length3.Once you start the capture, you can download the PCAP file and open it in Wireshark for analysis3.Alternatively, you can use the Mist AI app to scan the QR code on the AP and start a wireless packet capture from your mobile device3.

Answer : A, B

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.

Answer : A

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.

Answer : B, C

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 arethe MAC address of the client deviceandthe 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.

Answer : D

According to the web search results, the LED on a Mist AP can be used for antenna orientation in the location design phase, besides providing AP configuration status.The location design phase is the process of planning and deploying a wireless network that can provide accurate and reliable location services, such as indoor positioning, wayfinding, or asset tracking1.Antenna orientation is an important factor that affects the performance and accuracy of location services, as it determines the coverage and signal strength of the APs2.

The LED on a Mist AP can be used to indicate the antenna orientation by showing different colors and patterns depending on the angle of the AP3.For example, a blue LED means that the AP is facing down, a green LED means that the AP is tilted at 45 degrees, and a red LED means that the AP is facing up3.By using the LED as a guide, the network installer can easily adjust the angle of the AP to achieve the optimal coverage and location accuracy3.The LED can also be controlled remotely by using the Mist AI app or the Mist portal3.

Therefore, based on the web search results, the LED on a Mist AP can be used for antenna orientation in the location design phase, besides providing AP configuration status.This feature can help improve the quality and efficiency of location services in various scenarios, such as retail, hospitality, or healthcare1.