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Juniper JN0-460 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Wired Assurance Management or Operations: This section of the exam measures the skills of Network Operations Engineers and focuses on the management and operational aspects of Wired Assurance. It covers switch management, port profiles, and dynamic port configuration to ensure optimal network performance. The section also explores service-level expectations, client insights, and the use of APIs for improved monitoring and automation. Candidates gain an understanding of how MistAI enables proactive management and predictive troubleshooting to maintain service quality.
Topic 2
  • Campus EVPN-VXLAN: This section of the exam measures the skills of Data Center Network Engineers and explores the key principles of VXLAN and EVPN technologies. Candidates learn about Layer 2 tunneling, data and control plane operations, and the functions of VTEPs and VXLAN gateways. Additionally, it covers advanced EVPN concepts such as multipath routing, route types, and identifiers. The section concludes with a focus on MAC learning and policy applications to ensure efficient, scalable, and resilient network fabrics.
Topic 3
  • Wired Assurance Provisioning or Deployment: This section of the exam measures the skills of Network Deployment Specialists and focuses on the provisioning and deployment processes of Wired Assurance. It includes the essential steps and options involved in setting up networks, from configuration templates to deployment methodologies. Candidates learn about provisioning procedures, supported architectures, and the use of site variables to streamline automation and consistency across wired infrastructures.
Topic 4
  • Campus Fabric Architecture: This section of the exam measures the skills of Network Design Engineers and focuses on understanding and deploying Campus Fabric Architectures. It introduces essential design concepts such as EVPN multihoming, IP Clos architecture, and micro-segmentation. The section also compares CRB and ERB models, explains scaling requirements, and highlights how the Campus Fabric Core-Distribution design supports high-performance, scalable, and secure enterprise networks.
Topic 5
  • Wired Assurance Fundamentals: This section of the exam measures the skills of Network Support Engineers and covers the foundational elements of Wired Assurance within the MistAI ecosystem. It introduces candidates to key concepts such as supported devices, solution architecture, and the main features and components that define Wired Assurance functionality. Additionally, it highlights how MistAI accounts, analytics, and subscriptions integrate to deliver intelligent insights for network performance and operations.

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Juniper Mist AI Wired, Specialist (JNCIS-MistAI-Wired) Sample Questions (Q42-Q47):

NEW QUESTION # 42
Which component performsVXLAN encapsulation and de-encapsulation?

Answer: D

Explanation:
In anEVPN-VXLANarchitecture, theVXLAN Tunnel Endpoint (VTEP)is responsible for encapsulating and de-encapsulating Layer 2 Ethernet frames into VXLAN packets that traverse the IP underlay.
"Each device participating in a VXLAN overlay operates as a VXLAN Tunnel Endpoint (VTEP). The VTEP encapsulates Ethernet frames into VXLAN headers for transmission and de-encapsulates VXLAN packets back into Ethernet frames upon receipt." Option A:Incorrect - VLAN is a Layer 2 construct, not responsible for encapsulation.
Option B:Correct- VTEP handles VXLAN encapsulation and de-encapsulation.
Option C:Incorrect - root bridge pertains to STP, not VXLAN.
Option D:Incorrect - WXLAN policy is not a valid networking term in Juniper documentation.
References:
Juniper Mist AI for Wired - EVPN-VXLAN Overview
Junos OS EVPN-VXLAN Deployment Guide
Juniper Validated Design - VXLAN Tunnel Endpoint (VTEP) Functionality


NEW QUESTION # 43
When is a virtual routing and forwarding (VRF) instance typically used?

Answer: B

Explanation:
According to Juniper Networks' documentation on campus fabric and EVPN-VXLAN architectures, a Virtual Routing and Forwarding (VRF) instance-conceptually referred to within the Junos OS as a routing instance-is typically used to provide macro-segmentation by logically separating a single physical network into multiple, isolated virtual networks.2 In the context of a modern campus fabric managed by Juniper Mist, VRFs allow network administrators to create distinct routing domains that maintain their own independent routing and forwarding tables.3 This separation is essential for multitenancy and security.4 For example, an organization might use one VRF for "Corporate_IT" and another for "Guest_WiFi" or "IoT_Devices". Because each VRF operates with its own routing table, traffic belonging to one instance is completely isolated from traffic in another by default; packets cannot travel between VRFs unless an administrator explicitly configures "route leaking" or directs the traffic through a stateful firewall for security inspection. This architectural approach also permits the use of overlapping IP address spaces, as the routing decisions for one tenant do not interfere with the address entries of another.5 In a Juniper Mist-driven campus fabric (such as Core-Distribution or IP Clos), the Mist portal streamlines the creation of these VRF instances as part of the fabric workflow.6 Once a VRF is created, specific VLANs (and their corresponding IRB interfaces) are assigned to it, ensuring that Layer 3 gateways are placed in the correct logical domain. While the underlay network (Option D) is responsible for providing the physical reachability (loopback to loopback) between switches using a protocol like eBGP, the overlay network leverages VRFs to deliver the actual isolated user services.


NEW QUESTION # 44
How do VXLAN and EVPN work together to support MAC learning in a scalable way?

Answer: A


NEW QUESTION # 45
Which service level expectation (SLE) metric measures congestion on the uplink interface of a switch?

Answer: A

Explanation:
According to Juniper Mist documentation, the Throughput Service Level Expectation (SLE) is the primary metric used to represent the ability of wired users to pass traffic across the network without impedance. This SLE provides a comprehensive oversight of network performance by identifying issues that degrade the user experience, such as storm control events, interface anomalies, and specifically uplink congestion.
Within the Throughput SLE, the Congestion classifier (also referred to as Congestion Uplink) is specifically designed to monitor for buffer saturation and packet drops (TxDrops). When traffic arriving at an interface exceeds its processing or forwarding capacity, packets are queued in a buffer; if this buffer becomes full, the switch begins dropping packets. Juniper Mist utilizes a specific formula considering the ratios of TxDrops to TxPackets, Transmitted bps to Link Speed, and Received Speed to Link Speed to determine if a "Bad User Minute" has occurred due to congestion.
A critical feature of Wired Assurance is the automatic identification of uplink interfaces. Mist identifies these high-capacity ports by analyzing switch telemetry for characteristics such as having a switch or router as an LLDP neighbor, being designated as a Spanning Tree Protocol (STP) root port, or exhibiting significantly higher packet counts compared to access ports. When congestion is detected on an interface identified as an uplink, the system recognizes that this bottleneck impacts every user on that switch. By correlating these drops with the Throughput SLE, network administrators can proactively identify when a site requires more bandwidth or a different fabric architecture to handle current traffic demands, rather than simply monitoring if the link is physically "up" or "down".


NEW QUESTION # 46
You receive aMarvis Actionthat reports"Port negotiation mismatch detected on EX3400-48P." In this scenario, which two steps should you take to resolve the issue? (Choose two.)

Answer: C,D

Explanation:
Aport negotiation mismatchoccurs when the local and remote interfaces fail to agree on common speed or duplex settings.
Marvis Wired Assurance automatically detects this by analyzing telemetry from the switch's physical interfaces.
You can resolve this by ensuringauto-negotiationis enabled on both ends (A) and verifying the peer device supports the802.3 autonegotiation standard(D).
Manually forcing half-duplex or replacing hardware is unnecessary unless the hardware is faulty.
"Marvis Wired Actions correlate interface negotiation errors with LLDP neighbor data to pinpoint mismatched configurations, helping administrators quickly verify speed/duplex compatibility and 802.3 autonegotiation support." References:
Juniper Mist Wired Assurance - Marvis Actions and Insights Guide
Juniper EX Series Switches - Interface Negotiation Troubleshooting


NEW QUESTION # 47
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