Preparing for the JN0-281 Data Center, Associate (JNCIA-DC) exam requires a combination of theoretical knowledge, hands-on practice, and effective study strategies. One of the best ways to ensure success is by utilizing high-quality resources like the Data Center, Associate (JNCIA-DC) JN0-281 Exam Questions from PassQuestion, which are tailored to help you master the exam objectives and feel confident in your knowledge. Focus on understanding the core objectives, practicing configurations, and leveraging expert guidance to make the most of your preparation. With comprehensive, up-to-date Data Center, Associate (JNCIA-DC) JN0-281 Exam Questions, PassQuestion equips you with the insights and practice needed to excel in your test preparation.

Data Center, Associate (JNCIA-DC)

The Data Center, Associate (JNCIA-DC) certification, part of the Data Center track offered by Juniper Networks, is ideal for professionals seeking to validate their understanding of data center networking concepts. Designed for individuals with foundational knowledge of Juniper Networks Junos software and data center devices, this certification confirms competence in the following areas:

• Data center technologies.
• Configuration of Junos-based platforms.
• Troubleshooting skills for data center environments.

Who Should Pursue JNCIA-DC?

This certification is perfect for:

• Networking professionals entering the field of data center technologies.
• Engineers responsible for implementing and troubleshooting Juniper Networks devices.
• IT professionals aiming to enhance their skills and improve career prospects in data center networking.

Exam Details You Need to Know

Exam Code: JN0-281
Prerequisite Certification: None
Exam Delivery: Pearson VUE
Exam Length: 90 minutes
Number of Questions: 65 multiple-choice questions
Software Version Tested: Junos 24.2

Exam Objectives

Data Center Architectures

Identify concepts and general features of data center architectures:

• Traditional architectures (multitier)
• IP fabric architectures (spine/leaf)
• Layer 2 and Layer 3 strategies
• Overlay network vs. underlay network 
• Ethernet VPN–Virtual Extensible LAN (EVPN-VXLAN) basics/purpose

Layer 2 Switching and VLANs

Identify the concepts, operations, or functionalities of Layer 2 switching for Junos OS:

• Ethernet switching/bridging concepts and operations

Identify the concepts, benefits, or functionalities of VLANs:

• Port modes
• VLAN tagging
• Integrated Routing and Bridging (IRB)

Describe how to configure, monitor, or troubleshoot Layer 2 switching or VLANs:

• Ethernet switching/bridging
• VLANs

Protocol-Independent Routing

Identify the concepts, operations, or functionalities of various protocol-independent routing components:

• Static, aggregate, and generated routes
• Martian addresses
• Routing instances, including Routing Information Base (RIB) groups
• Load balancing
• Filter-based forwarding

Describe how to configure, monitor, or troubleshoot various protocol-independent routing components:

• Static, aggregate, and generated routes
• Load balancing

Data Center Routing Protocols BGP/OSPF

Identify the concepts, operation, or functionality of OSPF:

• Link-state database
• OSPF packet types
• Router ID
• Adjacencies and neighbors
• Designated router (DR) and backup designated router (BDR)
• OSPF area and router types
• Link State Advertisement (LSA) packet types

Describe how to configure, monitor, or troubleshoot OSPF:

• Areas, interfaces, and neighbors
• Additional basic options
• Routing policy application
• Troubleshooting tools

Identify the concepts, operation, or functionality of BGP:

• BGP basic operation
• BGP message types
• Attributes
• Route/path selection process
• IBGP and EBGP functionality and interaction

Describe how to configure, monitor, or troubleshoot BGP:

• Groups and peers
• Additional basic options
• Routing policy application

High Availability

Identify the concepts, benefits, applications, or requirements of high availability (HA):

• Link aggregation groups (LAG)
• Graceful restart (GR)
• Bidirectional Forwarding Detection (BFD)
• Virtual Chassis

Describe how to configure, monitor, or troubleshoot high availability components:

• LAG
• GR
• BFD

Top Tips for JN0-281 Exam Preparation

1. Understand the Exam Objectives Thoroughly

Familiarize yourself with each objective to build a strong foundation. Focus on concepts like data center architectures, VLANs, and BGP configurations, as they form a significant portion of the exam.

2. Leverage Official Juniper Resources

Juniper Networks offers extensive learning tools, including:

• Official study guides and courseware.
• Practice labs to simulate real-world tasks.
• Webinars and technical forums.

3. Hands-On Practice

Practical experience is invaluable. Work on real Juniper data center devices or virtual labs to practice configuration and troubleshooting. This hands-on approach will deepen your understanding of complex concepts.

4. Join a Community

Connect with fellow candidates and professionals in online forums or study groups. Sharing insights and solving problems collectively can significantly enhance your preparation.

View Online Data Center, Associate (JNCIA-DC) JN0-281 Free Questions

1. What are two common reasons for BGP routes to be in the hidden state? (Choose two.)
A. Routes are being rejected by a policy
B. Routes are being filtered from the inet.2 routing table
C. The next hop is unresolvable
D. The BGP neighbor is in a different autonomous system
Answer: A, C
 
2. You have configured a load balancing policy. Which statement is correct about applying the policy?
A. The policy is applied as an export policy under the routing protocol’s hierarchy.
B. The policy is applied as an export policy under routing-options forwarding table.
C. The policy is applied as an import policy under the routing protocol’s hierarchy.
D. The policy is applied as an import policy under routing-options forwarding table.
Answer: B
 
3. Under which Junos hierarchy is a static route configured?
A. system
B. routing-instances
C. routing-options
D. protocols
Answer: C
 
4. How does a layer 2 switch populate its bridge table?
A. It stores the protocol number of frames traversing the network.
B. It stores both the source and destination MAC addresses of frames traversing the network.
C. It stores the destination MAC address of frames traversing the network.
D. It stores the source MAC address of frames traversing the network.
Answer: D
 
5. In the Junos OS, what is the default behavior of a switch when it receives a frame with an unknown destination MAC address?
A. It discards the frame.
B. It floods the frame out of all ports except the one it was received on.
C. It sends the frame to its default gateway.
D. It buffers the frame until the MAC address can be learned.
Answer: B
 
6. Which two protocols can you use for a data center underlay network? (Choose two)
A. EBGP
B. OSPF
C. VXLAN
D. EVPN
Answer: A, B
 
7. In the context of data center networking, what is the primary purpose of an Underlay Network?
A. To provide a physical infrastructure for an Overlay Network.
B. To handle external network connections exclusively.
C. To facilitate virtual machine migrations.
D. To encrypt data traffic between servers.
Answer: A
 
8. With regards to graceful restart, which two statements are true? (Choose two.)
A. A supported routing protocol, such as BGP, must be operational for graceful restart to work.
B. NSR must be enabled for graceful restart to work.
C. Dual routing engines are required for graceful restart to work.
D. The network topology must be stable for graceful restart to work.
Answer: A, D
 
9. EVPN/VXLAN is primarily used in modern data centers to:
A. Increase the physical distance between data centers.
B. Provide Layer 2 connectivity over a Layer 3 network.
C. Replace traditional routing protocols.
D. Enhance the physical security of the data center.
Answer: B
 
10. Which two statements are correct about aggregated Ethernet bundles? (Choose two.)
A. You must enable the chassis to support aggregated Ethernet interfaces.
B. You must purchase a services license for the chassis to support aggregate Ethernet interfaces.
C. You must specify which interfaces are members of a specific aggregated Ethernet bundle.
D. You must enable LACP when configuring aggregated Ethernet bundles.
Answer: A, C