JN0-281: Data Center, Associate (JNCIA-DC)

By Juniper · Browse Mode
About the Exam

This associate-level Juniper certification is for data center networking professionals with introductory knowledge of Junos software and Juniper data center devices. It verifies understanding of data center technologies, related platform configuration, and troubleshooting skills. The exam covers data center architectures, Layer 2 switching and VLANs, protocol-independent routing, BGP and OSPF, and high availability.

Exam Topics

  • Data Center Architectures20%
  • Layer 2 Switching and VLANs20%
  • Protocol-Independent Routing20%
  • Data Center Routing Protocols BGP/OSPF20%
  • High Availability20%

How to Use This Practice Exam

  1. Browse — Read each question, select your answer, and reveal the explanation.
  2. Exam Mode — Simulate real exam conditions with a timed session and score report.
  3. Learn Mode — Spaced repetition schedules questions you struggle with for long-term retention.

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Last updated July 9, 2026 at 5:40 AM

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QuestionQ1

Layer 2 Switching and VLANs

Which statement accurately describes access ports?

Explanation

A switch access port belongs to one VLAN and carries untagged traffic for that VLAN. Carrying traffic for multiple VLANs is a trunk-port function.

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QuestionQ2

Layer 2 Switching and VLANs

Which two statements are true about configuring VLANs?

Choose two
Explanation

A VLAN is defined with a VLAN name or identifier and Layer 2 interface membership. A trunk-mode interface carries traffic for multiple VLANs, while an access-mode interface is limited to one VLAN. An IRB interface is only needed to provide Layer 3 routing for a VLAN.

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QuestionQ3

Protocol-Independent Routing

Which statement is correct about the qualified next-hop feature when configuring a static route?

Explanation

A qualified next hop lets a static route use multiple possible next hops while assigning specific properties, such as a distinct preference or metric, to an individual next hop. This supports primary and backup forwarding paths for redundancy.

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QuestionQ4

Layer 2 Switching and VLANs

By default, which two statements regarding trunk and access ports are correct?

Choose two
Explanation

An access port carries traffic for one access VLAN and forwards it untagged toward the attached endpoint. A trunk carries multiple VLANs and forwards VLAN traffic with 802.1Q tags so the receiving device can identify each VLAN. A native VLAN on an 802.1Q trunk is a special untagged exception.

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QuestionQ5

Layer 2 Switching and VLANs

What is one function of an integrated routing and bridging (IRB) interface?

Explanation

An IRB interface provides Layer 3 connectivity for VLANs and routes traffic between separate VLANs or bridge domains. Juniper: Integrated Routing and Bridging

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