Cisco 300-620 DCACI Exam Practice Questions, practice question pack
CISCO · 300-620

Cisco 300-620 DCACI Exam Practice Questions

404 questionsPDF by emailUpdated September 2026

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Three of the 404 questions in this pack

Question 1

An engineer is implementing a Cisco ACI data center network that includes Cisco Nexus 2000 Series 10G fabric extenders. Which physical topology is supported?

Exhibit for question 1

Exhibit for question 1

Show answer and explanation

Correct answer: C. Nexus 9K Switches - ACI Mode with Spine 1 and

Spine 2 connected to Leaf 1 and Leaf 2 (10GE) in a full mesh, which then connect to FEX 101 and FEX 102 in a full mesh. Labeled 'Port Channel Aggregation Connectivity' In Cisco ACI, Nexus 2000 Series fabric extenders (FEX) are supported in a two-tier leaf architecture where the FEX devices connect to Leaf switches, not directly to Spine switches. Option C shows the correct supported topology with Spines connecting to Leaves in a full mesh, and Leaves connecting to FEX devices in a full mesh using Port Channel Aggregation (PCA) for redundancy. The FEX devices do not connect directly to the Spine layer in ACI mode. Option A shows Virtual Port Channel Aggregation which is a different concept, option B incorrectly shows FEX devices connecting directly to Spines, and option D shows a non-redundant direct connection topology.

Why the other options are wrong

  • A. Shows Virtual Port Channel Aggregation rather than Port Channel Aggregation, which is not the standard ACI fabric extender topology
  • B. Incorrectly shows FEX devices connecting directly to both Spine switches, bypassing the Leaf layer, which is not supported in ACI mode

Question 2

An ACI administrator notices a change in the behavior of the fabric. Which action must be taken to determine if a human intervention introduced the change?

  1. Inspect event records in the APIC UI to see all actions performed by users.
  2. Inspect /var/log/audit_messages on the APIC to see a record of all user actions.
  3. Inspect audit logs in the APIC UI to see all user events.
  4. Inspect the output of show command history in the APIC CLI.
Show answer and explanation

Correct answer: C. Inspect audit logs in the APIC UI to see all user events.

events. Audit logs in the APIC UI provide a comprehensive record of all user events and actions performed on the fabric, including configuration changes made through human intervention. This is the primary method to track administrative actions and determine if a change was introduced manually.

Why the other options are wrong

  • A. Event records show fabric events but not specifically user actions performed.
  • B. While audit_messages exists on the APIC, the UI audit logs interface is the proper and supported method for viewing user actions.
  • D. Command history is not a standard APIC CLI feature for tracking user actions across the fabric.

Question 3

An engineer is creating a configuration import policy that must terminate if the imported configuration is incompatible with the existing system. Which import mode achieves this result?

  1. merge
  2. atomic
  3. best effort
  4. replace
Show answer and explanation

Correct answer: B. atomic

Atomic import mode ensures that the entire import operation is treated as a single transaction; if any part of the configuration is incompatible with the existing system, the entire import is rejected and the fabric state remains unchanged. This prevents partial or incompatible configurations from being applied.

Why the other options are wrong

  • A. Merge mode combines imported configuration with existing configuration and would not terminate on incompatibility.
  • C. Best effort mode attempts to apply what it can and ignores incompatible elements rather than terminating.
  • D. Replace mode overwrites existing configuration without checking compatibility with the current system state.

See all 10 free questions Get the full pack, US$39

404 practice questions for Cisco 300-620 DCACI v1.2, the ACI concentration exam for CCNP Data Center, with full explanations.

Every question comes with the correct answer, the reasoning behind it, and a note on why each wrong option is wrong. Work through it once with the answers, then again with the questions-only copy under exam conditions.

  • 404 questions across all six DCACI domains
  • Answers and explanations for every question, including the wrong options
  • A questions-only PDF for timed practice runs
  • Instant delivery by email the moment you check out
  • Free monthly updates for as long as the exam is live
  • Pass or your money back

A failed 300-620 attempt costs another US$300. This pack is US$39, paid once, and refunded if you fail.

Try 10 questions free before you buy.

Last updated September 2026 · 404 questions

What makes the DCACI hard

DCACI is the most popular CCNP Data Center concentration because ACI is where the jobs are, and v1.2 is the current blueprint. It is a 90-minute exam that goes deep on one product rather than wide across the data centre, so the questions get into configuration detail fast.

Three domains carry 20% each: fabric infrastructure, external connectivity and management. Fabric covers the object model, virtual APIC, fabric discovery and policies, and the full logical construct chain of tenant, application profile, VRF, bridge domain, EPG and contracts. External connectivity is Layer 2 with STP basics and EPG port bindings, plus L3Out. Management covers out-of-band and in-band access, Nexus Dashboard Insights, snapshots, AAA and upgrades. Packet forwarding is 15% on endpoint learning and bridge domain settings. Integrations at 15% now include Nutanix VMM alongside VMware DVS. ACI Anywhere closes at 10% with Multi-Pod, Multi-Site and Remote Leaf.

About the exam

300-620 (Implementing Cisco Application Centric Infrastructure v1.2, DCACI) earns the Cisco Certified Specialist, Data Center ACI Implementation certification and counts as the concentration exam for CCNP Data Center. It covers ACI fabric infrastructure, packet forwarding, external network connectivity, VMM and service graph integrations, ACI management, and ACI Anywhere. No prerequisites.

Exam domains

  • ACI Fabric Infrastructure: 20%
  • ACI Packet Forwarding: 15%
  • External Network Connectivity: 20%
  • Integrations: 15%
  • ACI Management: 20%
  • ACI Anywhere: 10%

90 minutes, US$300 per attempt, Pearson VUE test centre or online, certification valid for three years. Cisco does not publish a fixed passing score.

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Questions before you buy

What do I get when I buy the Cisco 300-620 DCACI pack?

404 practice questions as a PDF, each with the correct answer, a full explanation and a note on why the other options are wrong, plus a separate questions-only PDF for timed practice.

How quickly do I receive it?

Your PDF is prepared and sent to your email address after checkout, and you get a confirmation as soon as it is on its way.

Is there a free sample?

Yes. Ten questions from this pack, with answers and explanations, are free on this page and as a PDF, so you can judge the quality before you pay.

Are updates included?

Yes. The pack is updated every month for as long as the exam is live, and updates are free for everyone who has bought it.

What if I fail the exam?

We refund the pack. Sit the exam 7 to 30 days after buying, then send your official score report within 7 days of the exam date, as set out in the refund policy.

Can I share it with colleagues?

Each purchase is licensed to one person. For a team, school or training organisation, email support@certstash.com for a licence that fits.

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