JN0-481 - Data Center, Specialist (JNCIS-DC)–Valid Valid Study Plan

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Juniper JN0-481 Exam Syllabus Topics:

SectionWeightObjectives
Data Center Architectures20%- IP Fabrics
  • 1. Underlay and overlay networks
  • 2. Spine-leaf topology concepts
  • 3. ECMP and load balancing
- EVPN-VXLAN
  • 1. Network segmentation and multi-tenancy
  • 2. EVPN control plane and routing
  • 3. VXLAN encapsulation and operation
Apstra Build and Deploy Phases15%- Fabric deployment
  • 1. Cable mapping and topology discovery
  • 2. Deployment modes and state management
  • 3. Device onboarding and agent installation
- Configuration management
  • 1. Configuration types and versioning
  • 2. Blueprint generation and activation
Blueprint Operations15%- Troubleshooting
  • 1. Query tools and topology inspection
  • 2. Anomaly detection and analysis
- Day-to-day management
  • 1. Dashboard and monitoring views
  • 2. Change management and rollback
  • 3. Time voyager and configuration history
Juniper Apstra Architecture15%- Intent-based networking principles
  • 1. Continuous compliance monitoring
  • 2. Intent definition and validation
- Core components
  • 1. Apstra server and agents
  • 2. User interface and APIs
  • 3. RBAC and system management
Apstra Design Phase15%- Configuration and validation
  • 1. Design rules and constraints
  • 2. Pre-deployment validation
- Design elements
  • 1. Reference designs and templates
  • 2. Device profiles and logical models
  • 3. Rack layout and capacity planning
Intent-Based Analytics10%- Analytics features
  • 1. Graph explorer and telemetry
  • 2. Probes and anomaly detection
- Operational insights
  • 1. Capacity planning
  • 2. Performance monitoring
Data Center Multitenancy10%- Integration and extension
  • 1. VMware integration
  • 2. Data center interconnect (DCI)
- Multitenant design
  • 1. VRF and virtual networks
  • 2. Connectivity templates and policies

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Juniper Data Center, Specialist (JNCIS-DC) Sample Questions (Q71-Q76):

NEW QUESTION # 71
You are asked to deploy a collapsed fabric architecture.
Which two statements are correct about this deployment? (Choose two.)

Answer: B,D

Explanation:
In a collapsed fabric architecture, the leaf devices act as both leaf and spine switches:
Leaf devices are full-mesh connected - because there is no dedicated spine layer, leaves interconnect directly with each other in a full mesh.
Top-of-rack switches (leaves) provide VXLAN support - they handle both access (server connectivity) and overlay/EVPN-VXLAN functionality.


NEW QUESTION # 72
Exhibit.

Referring to the exhibit, which role does Device A serve in an IP fabric?

Answer: B

Explanation:
Device A serves as a spine in an IP fabric. An IP fabric is a network architecture that uses a spine-leaf topology to provide high performance, scalability, and reliability for data center networks. A spine-leaf topology consists of two layers of devices: spine devices and leaf devices. Spine devices are the core devices that interconnect all the leaf devices using equal-cost multipath (ECMP) routing. Leaf devices are the edge devices that connect to the servers, storage, or other network devices. In the exhibit, Device A is connected to four leaf devices using multiple links, which indicates that it is a spine device. The other options are incorrect because:
A . leaf is wrong because a leaf device is an edge device that connects to the servers, storage, or other network devices. In the exhibit, Device A is not connected to any servers, storage, or other network devices, but only to four leaf devices, which indicates that it is not a leaf device.
C . super spine is wrong because a super spine device is a higher-level device that interconnects multiple spine devices in a large-scale IP fabric. A super spine device is typically used when the number of leaf devices exceeds the port density of a single spine device. In the exhibit, Device A is not connected to any other spine devices, but only to four leaf devices, which indicates that it is not a super spine device.
D . server is wrong because a server device is a compute or storage device that connects to a leaf device in an IP fabric. A server device is typically the end host that provides or consumes data in the network. In the exhibit, Device A is not connected to any leaf devices, but only to four leaf devices, which indicates that it is not a server device. Reference:
IP Fabric Underlay Network Design and Implementation
IP Fabric Overview
IP Fabric Architecture


NEW QUESTION # 73
What does EVPN use lo identity which remote leaf device advertised the EVPN route?

Answer: A

Explanation:
EVPN uses a route distinguisher (RD) value to identify which remote leaf device advertised the EVPN route. An RD is a 64-bit value that is prepended to the EVPN NLRI to create a unique VPNv4 or VPNv6 prefix. The RD value is usually derived from the IP address of the PE that originates the EVPN route. By comparing the RD values of different EVPN routes, a PE can determine which remote PE advertised the route and which VRF the route belongs to.


NEW QUESTION # 74
Which statement correctly describes the purpose of the Apstra "Time Voyager" feature?

Answer: B

Explanation:
Time Voyager in Juniper Apstra allows administrators to view the historical states of a blueprint over time, compare differences between snapshots, and roll back the network to a previously committed configuration state if needed. This provides a powerful tool for troubleshooting and recovering from unintended changes.


NEW QUESTION # 75
What is the primary reason for creating an Apstra worker node?

Answer: D

Explanation:
The primary reason for creating an Apstra worker node is to offload resource-intensive tasks such as running off-box agents and Intent-Based Analytics (IBA) probes from the main Apstra server.
This improves performance and scalability, especially in larger or more complex deployments.


NEW QUESTION # 76
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