Juniper Mist AI Wired, Specialist JN0-460 JNCIS-MistAI-Wired Exam Questions

Answer : A, C

Wired Assurance in Mist Cloud provides automated configuration for Juniper EX Series switches. The automation is built on open APIs and supports programmable workflows, which allow seamless integration with external systems and reduce manual configuration errors.

''Wired Assurance leverages 100% open APIs, enabling integration with third-party automation and orchestration tools. Combined with programmable workflows, this provides a consistent and scalable automation framework for switch deployment and management.''

Option A (100% open APIs): Correct --- APIs enable automation and external integration.

Option C (programmable workflows): Correct --- workflows automate repetitive tasks and provisioning.

Option B (client SLEs): Incorrect --- this is part of user experience monitoring, not automation.

Option D (switch insights): Incorrect --- this relates to telemetry and visibility, not automation.

Juniper Mist AI for Wired -- Wired Assurance Overview

Juniper Mist AI for Wired -- Switch Automation and APIs Guide

Juniper Validated Design -- Mist Wired Automation Best Practices

Answer : C

According to Juniper Mist documentation, the Throughput Service Level Expectation (SLE) is the primary metric used to measure the ability of wired clients to pass traffic across the physical network without impedance. This SLE is critical for diagnosing issues with real-time, high-bandwidth applications such as video streams, which are highly sensitive to packet loss and latency. Within the Throughput SLE, the Storm Control classifier is specifically designed to identify 'bad user minutes' caused by the suppression of Broadcast, Unknown Unicast, and Multicast (BUM) traffic.

Storm control is a mechanism that enables the switch to monitor traffic levels and drop BUM packets when a specified traffic level---known as the storm control level---is exceeded. This prevents a 'traffic storm' from proliferating and degrading the overall performance of the LAN. While this is a vital security feature to prevent network meltdowns, it can inadvertently impact legitimate traffic. For instance, if multicast-based video streams or other heavy BUM traffic exceed the configured bandwidth percentage on a port, the switch will drop those packets to protect the rest of the network.

When troubleshooting video stream issues, network administrators should inspect the Storm Control classifier to see if it is triggering 'bad user minutes'. If the Mist dashboard indicates failures under this classifier, it signifies that the switch hardware is actively dropping packets because the BUM traffic limit has been reached. This provides immediate root-cause evidence, allowing the administrator to determine if they need to adjust the storm control thresholds within the Port Profile or investigate the source of the excessive broadcast traffic. By correlating these hardware-level events with the end-user experience, Mist AI simplifies the resolution of complex performance problems that traditional 'up/down' monitoring would miss.

Answer : C

According to Juniper Mist documentation regarding campus fabric design, the campus fabric IP Clos (also known as a 5-stage Clos) is the architecture that extends the EVPN-VXLAN protocol stack from the core tier down through the distribution tier and finally to the access tier. In this model, every switch in the hierarchy---from the high-capacity core switches to the wiring closet access switches---participates in the EVPN control plane and VXLAN data plane.

By extending EVPN-VXLAN to the access tier, the IP Clos architecture provides a standards-based, scalable framework that allows for seamless Layer 2 connectivity over a Layer 3 underlay across the entire campus333333333. This enables advanced features like Microsegmentation using Group-Based Policies (GBP) and Macrosegmentation via Virtual Routing and Forwarding (VRF) instances directly at the edge of the network.

In contrast, other architectures like 'core-distribution' (either CRB or ERB) typically limit the EVPN-VXLAN fabric to the core and distribution layers, leaving the access tier to connect via traditional methods like LAG, Virtual Chassis, or standard Layer 2 trunks5555. The IP Clos architecture is specifically designed for large-scale deployments where high density, vendor interoperability, and end-to-end policy enforcement are critical6. By utilizing a 5-stage IP Clos, organizations can eliminate the complexities of Spanning Tree Protocol (STP) while maintaining a flexible, 'any-to-any' communication path throughout the physical infrastructure.

Answer : B

According to the Juniper Mist Wired Assurance Configuration Guide, the foundational step for implementing Layer 2 segmentation within the Mist UI is the creation of a 'Network'. In the context of Mist Wired Assurance, a Network is logically synonymous with a Virtual Local Area Network (VLAN). To define a network, a user must navigate to the Networks section---located within an organization-level template, a site-level configuration, or an individual switch configuration---and click to add a new entry.

The two mandatory parameters for this step are naming the VLAN and providing the corresponding VLAN ID. The name serves as a human-readable alias (such as 'Corporate_Data' or 'IoT_Devices') that allows administrators to easily reference the segment across different parts of the configuration without constantly tracking numeric IDs. The VLAN ID is the specific numeric value (ranging from 1 to 4094) that will be used by the switch for 802.1Q tagging on the physical wire.

This step is a prerequisite for more advanced configurations. Once a network is created with its name and ID, it can then be selected within a Port Profile. While creating a port profile (Option C) or an access policy (Option D) are common tasks in the deployment workflow, they are dependent on the prior existence of a defined Network. For instance, a Port Profile defines how a port behaves (e.g., access vs. trunk), but it must point to a specific Network name to know which VLAN to assign to that interface. Similarly, site variables can be used to override these VLAN IDs at specific locations, but the base definition requires the initial pairing of a name and a default ID in the portal.

Answer : C

According to Juniper Networks' software licensing documentation, Juniper utilizes a tiered subscription model for its Junos OS features on EX and QFX Series switches, specifically designed to align with different network use cases. This model is categorized into three main tiers: Standard, Advanced, and Premium. While basic Layer 2 and Layer 3 functions are included in the base or Standard tiers, advanced fabric technologies are reserved for the highest tier.

The Premium License is explicitly required to enable the full EVPN-VXLAN protocol stack on Juniper switches within a campus or data center fabric. As detailed in the Juniper Licensing User Guide, the Premium license serves as a superset that includes all functionality from the Standard and Advanced tiers, while specifically unlocking the advanced routing and virtualization features necessary for modern fabrics. Specifically, this license entitles the user to configure and run Multiprotocol BGP (MP-BGP) with the EVPN address family---which acts as the control plane---and the VXLAN encapsulation required for the data plane.

In a Juniper Mist Wired Assurance environment, there is a clear distinction between the cloud-based management subscription and the local Junos OS license. While the Wired Assurance subscription provides the AI-driven visibility, SLE monitoring, and automation capabilities through the Mist cloud, the Junos OS Premium license is a prerequisite on the physical hardware to execute the EVPN-VXLAN commands and maintain compliance with Juniper's End User License Agreement (EULA). For instance, on platforms like the EX4650 or QFX5120, attempting to commit a configuration involving EVPN without the appropriate Premium Feature License (PFL) will result in system warnings and protocol limitations, as these features are considered 'high-value' software capabilities intended for complex, multitenant campus environments.

Answer : A, C, D

According to Juniper Mist documentation, the EX2300, EX4650, and QFX5120 switches require a specific additional workflow within the Mist portal to form a Virtual Chassis because these models do not have dedicated Virtual Chassis ports (VCPs). Unlike other EX-series models (such as the EX4100 or EX4400) that possess factory-defined, dedicated VCPs and can form a Virtual Chassis automatically upon physical connection, these three platforms require an administrator to explicitly initiate the 'Form Virtual Chassis' action from the Mist UI.

This workflow is necessary because the system must logically convert standard network uplink ports into Virtual Chassis ports to enable stack communication. To execute this, the switches must first be onboarded to the Juniper Mist cloud as standalone devices and assigned to the same site. Once they are online and their configuration is managed by Mist, the administrator selects the desired members from the switch inventory and clicks More > Form Virtual Chassis.

During this additional workflow, the Mist portal prompts the user to specify which front-panel ports will be repurposed as VCPs and allows for the manual assignment of member IDs and Routing Engine roles. This 'pre-provisioned' method ensures a deterministic setup where roles are not left to chance. Once the command is pushed, the switches reboot to reconfigure their internal hardware logic to treat the selected ports as fabric links. Juniper emphasizes that for these specific models, the 'Form Virtual Chassis' option is the only supported way to establish the stack within Wired Assurance, as it ensures that the cloud-native management plane correctly recognizes the multiple physical chassis as a single logical entity.

Answer : B, C, D

Forgreenfield onboarding, switches are newly deployed and must be claimed into Mist Cloud. Juniper Mist offers multiple claim options to simplify large-scale onboarding.

''You can claim switches using the device's QR claim code, by bulk importing from a sales order, or through API-based automation for large deployments. Each of these methods securely associates the devices to your organization in Mist Cloud.''

Option A:Incorrect --- serial number alone is not sufficient for claiming.

Option B:Correct--- claim codes (QR) uniquely identify switches.

Option C:Correct--- bulk claim from a sale order streamlines large deployments.

Option D:Correct--- APIs support automated claiming and provisioning workflows.

Option E:Incorrect --- MAC address alone cannot be used to claim devices.

Juniper Mist AI for Wired -- Switch Onboarding and Claiming Guide

Juniper Mist AI Cloud -- Greenfield Deployment and Automation Documentation

Juniper Mist Wired Assurance -- API-Based Device Provisioning