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Data Center, Specialist (JNCIS-DC)

The Data Center track allows you to demonstrate your expertise in data center technologies and your ability to configure and solve issues related to them. JNCIS-DC, the Specialist-level certification in this track, is intended for data center networking professionals who have intermediate knowledge of Juniper Networks Apstra software and data center devices. The written exam assesses your understanding of data center technologies, platform configuration, and troubleshooting skills.

This track consists of four certifications:
- JNCIA-DC: Data Center, Associate.
- JNCIS-DC: Data Center, Specialist.
- JNCIP-DC: Data Center, Professional.
- JNCIE-DC: Data Center, Expert.

Exam Details

Exam Code: JN0-480
Prerequisite Certification: JNCIA-DC
Delivered by: Pearson VUE
Exam Length: 90 minutes
Exam Type: 65 multiple-choice questions
Software Versions: Apstra 4.0.2/Junos 21.2

Exam Objectives

Data Center Architectures (IP Fabrics, EVPN-VXLAN)

Describe the concepts, operation, or functionality of an IP fabric

• Spine-Leaf topology design
• ECMP load balancing
• Underlay and Overlay routing strategies
• Juniper Networks best practices

Identify the concepts, operation, or functionality of EVPN

• EVI
• Bridge domain
• Ethernet segments
• Route distinguisher
• Route target versus vrf-import and vrf-export policies
• EVPN route types
• ERB using Type 2 or Type 5

Identify the concepts, operation, or functionality of VXLAN

• Control plane options
• VNI-to-VLAN mapping
• VTEP functions

Juniper Apstra Architecture 

Identify concepts and general features of Juniper Apstra

• Apstra Server
• Apstra device agents
• Apstra UI
• RBAC (role-based access-control)
• Event log
• Syslog

Apstra Design Phase

Identify the concepts, operation, or functionality of components in the Apstra design phase

• DC Reference Design
• Interface maps
• Device profiles (e.g., interface naming and speeds)
• Resources
• Tags
• Logical devices
• Rack types
• Planning total spine capacity
• Templates

Describe how to configure, monitor, or troubleshoot the various components in the Apstra design phase

Apstra Build and Deploy Phases

Identify the concepts, operation, or functionality of components in the Apstra build and deploy phases

• Fabric device management (e.g., install agents, system IDs)
• Blueprint UI
• Cable map
• Device states
• Deploy modes

 Describe how to configure, monitor, or troubleshoot the various components in the Apstra build and deploy phases

Blueprint Operations

Identify the concepts, benefits, applications, or requirements of managing and operating a deployed Apstra blueprint

• Service versus probe anomalies
• Usage of top-level tabs (dashboard, analytics, staged, uncommitted, active, time voyager)
• Querying the blueprint
• Find by tags
• Making changes to a blueprint
• Reverting
• Time voyager usage
• Property sets and configlets
• Root cause identification
• Virtual networks and connectivity templates
• Adding a rack
• Configuration types (e.g., rendered, incremental, and pristine configs)
• Adding a generic system

 Describe how to configure, monitor, or troubleshoot a deployed Apstra blueprint

Data Center Multitenancy

Identify the concepts, operation, or functionality of multitenancy using Apstra

• Connectivity templates
• Routing zones and VRFs
• Routing policy
• Virtual networks
• Security policies
• VMware integration as it relates to Apstra
• Data Center Interconnect

Describe how to configure, monitor, or troubleshoot multitenancy using Apstra

Intent-based Analytics

Identify the concepts, benefits, applications, or requirements of using Apstra intent-based

• Graph explorer
• Graph queries
• IBA probes

Describe how to configure, monitor, or troubleshoot Apstra intent-based analytics

View Online Data Center, Specialist (JNCIS-DC) JN0-480 Free Questions

1. What are two system-defined user roles that are available in Juniper Apstra? (Choose two.)
A. authorized
B. root
C. viewer
D. user
Answer: C D

2. When editing a device configuration to install some manual changes, which procedure should be followed?
A. Edit the configuration on the device directly by the CLI; the changes will automatically be adjusted in the Juniper Apstra configuration
B. Edit the pristine configuration of the device.
C. Add a persistent change to a device configuration with a configlet.
D. Delete the device from the Juniper Apstra system, change the configuration, then re-import the device.
Answer: C

3. You have designed your fabric in Juniper Apstra prior to deploying the network devices.
Which Apstra element in the Staged tab would be used to assist the team that is installing and cabling the devices?
A. Connectivity Templates
B. Virtual Networks table
C. Managed Devices list
D. Links table
Answer: D

4. You are working with a three-stage IP fabric using EBGP for peering.
In this scenario, which two actions are required to implement ECMP? (Choose two.)
A. Usea load balancing policy applied to the forwarding table as an export policy.
B. Use a load balancing policy applied to BGP as an export policy.
C. Use the multipath multiple-as BGP parameter.
D. Use a load balancing policy applied lo BGP as an import policy.
Answer: B C

5. What is the purpose of using a routing zone inside Juniper Apstra software?
A. A routing zone is used to enable L4-L7 inspection inside the fabric.
B. A routing zone is defined to secure the routing protocols.
C. A routing zone defined at the Apstra manager level requires firewalls to be deployed.
D. A routing zone is used to enable the communication between two VNIs within a VRF.
Answer: D

6. Which protocol is used to advertise EVPN routes?
A. OSPF
B. BGP
C. IS-IS
D. RIP
Answer: B

7. Which of the following two statements are correct?
A. VXLAN encapsulation discards VNIs
B. VXLAN is a Layer 3 encapsulation protocol
C. VXLAN encapsulation discards VLAN IDs
D. VXLAN is a Layer 2 encapsulation protocol
 Answer: C, D

8. How does Apstra use Fabric Device Management to ensure consistency across the network?
A. By randomly assigning system IDs to devices
B. By enforcing uniform configurations on all network devices
C. By adjusting the color-coding of cables in the data center
D. By assigning different agents to devices based on their location
Answer: B

9. How does Intent-Based Analytics align with the principles of intent-based networking in terms of data exploration and analysis?
A. By predicting future changes in the network environment
B. By facilitating dynamic queries for intent-based data exploration
C. By managing employee property allocations in the data center
D. By providing real-time weather updates for the data center location
Answer: B

10. In the Apstra design phase, what is the role of DC Reference Design?
A. It refers to the design of data center furniture layout
B. It provides a blueprint for the overall data center architecture and configuration
C. It specifies the color scheme for network cables
D. It determines the placement of security cameras in the data center
Answer: B