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IT Certifications · 300-620 DCACI

Cisco Implementing Cisco Application Centric Infrastructure Exam Practice Test

The Cisco Implementing Cisco Application Centric Infrastructure Exam covers configuring and operating an ACI fabric through policy-based networking. Its practice bank includes scenarios on leaf-interface attachment, access policy, bridge-domain subnets, endpoint location, fabric faults, configuration backup, and switch maintenance—tasks that connect application requirements with physical fabric behavior.

Exam overview

Exam providerCisco
Exam code300-620 DCACI
CategoryIT Certifications

About the Cisco Implementing Cisco Application Centric Infrastructure Exam

ACI operations require tracing how an endpoint’s attachment maps through leaf ports, access policies, endpoint groups, and bridge domains. Administrators use APIC information to inspect learned endpoint locations, identify policy or link faults, and determine whether an observed connectivity problem comes from configuration or physical state. The practice scenarios also touch on preserving fabric configuration for recovery, using policy validation and fault data before changes, and planning upgrades with attention to sequence and impact. Understanding spine connectivity and available forwarding paths helps explain how the fabric responds when a link or device becomes unavailable. These skills support methodical implementation and troubleshooting: verify the attachment, follow the applicable policy, inspect operational evidence, and assess change effects before altering the fabric.

Sample Practice Questions

Review a selection from this exam's published US Practice Tests practice bank.

Question 1

A team is troubleshooting why a physical server cannot reach an intended ACI policy attachment. Which information is most useful to verify first on the connected leaf interface?

  1. AThat the interface's access policy and VLAN encapsulation are consistent with the intended attachment
  2. BThat the APIC cluster has a matching server operating-system license
  3. CThat the spine switch has learned the server's application process list
  4. DThat the tenant name matches the server's DNS search suffix
Show answerCorrect answer: A

For a physically connected endpoint, checking the leaf interface's access-policy configuration and expected VLAN encapsulation is a practical initial step. The other items are unrelated to ACI interface attachment.

Question 2

What is the purpose of a port-channel policy group in ACI access policy?

  1. ATo apply aggregation-related settings to a bundled set of physical interfaces
  2. BTo define a routing table for an external Layer 3 network
  3. CTo classify a VM using its hypervisor inventory attributes
  4. DTo configure a tenant-wide subnet allocation service
Show answerCorrect answer: A

A port-channel policy group supplies relevant access-policy settings for interfaces operating together as a port channel or related bundled link.

Question 3

A team needs a copy of fabric configuration that can be retained independently for recovery planning. Which action best supports this goal?

  1. AExport a configuration backup and store it in a protected external location
  2. BClear all historical faults before each change
  3. CDisable endpoint learning on all leaf switches
  4. DRemove unused tenant objects without recording the changes
Show answerCorrect answer: A

An exported configuration backup stored outside the fabric provides a recoverable copy if the live configuration is lost or damaged. Retaining it securely and managing versions improves recovery readiness.

Question 4

What is a key operational difference between a configuration fault and a fault that reports a physical link failure in ACI?

  1. AA configuration fault indicates a policy or configuration issue, while a link fault reports a problem with connectivity at a physical interface
  2. BA configuration fault always means a spine has failed, while a link fault always means a tenant is missing
  3. CA configuration fault affects only the APIC GUI, while a link fault affects only backups
  4. DThere is no difference; both identify the same underlying condition
Show answerCorrect answer: A

ACI faults describe a range of conditions. A configuration-related fault points to a policy or configuration problem, whereas a physical link fault indicates an interface or connectivity condition. Distinguishing these categories helps narrow troubleshooting.

Question 5

When planning a change to an ACI policy, what is a useful role of the APIC's policy validation or fault information?

  1. AIt can help identify configuration issues that may prevent intended policy deployment
  2. BIt automatically guarantees that application performance meets service-level targets
  3. CIt replaces the need to verify endpoint connectivity
  4. DIt selects physical cabling paths without regard to the fabric topology
Show answerCorrect answer: A

Validation feedback and faults can reveal configuration inconsistencies or deployment problems. They are useful diagnostic aids, but do not guarantee application outcomes or eliminate the need for operational testing.

Question 6

Before applying a fabric-wide software upgrade, an operator wants to understand the expected sequence and potential impact. Which practice is most appropriate?

  1. AReview the upgrade plan and compatibility guidance, then schedule the change with an appropriate maintenance window
  2. BUpgrade all nodes simultaneously without checking dependencies
  3. CDisable all fabric policies for the duration of the upgrade
  4. DDelete the node inventory so the upgrade can rediscover switches
Show answerCorrect answer: A

Planning an upgrade includes checking compatibility and release guidance, understanding the upgrade sequence, and choosing a suitable maintenance window. This reduces avoidable operational risk.

Question 7

An administrator needs to inspect which leaf and interface currently host a learned endpoint. Where is this information typically available in ACI?

  1. AThe endpoint database or endpoint-focused operational views
  2. BThe fabric's VLAN pool definition
  3. CThe APIC firmware image repository
  4. DThe contract filter entry
Show answerCorrect answer: A

ACI maintains operational endpoint information that can be inspected to identify a learned endpoint's location, such as its leaf and interface. VLAN pools, images, and filters serve different purposes.

How to use this practice test

Access is free. A practice session draws up to 20 random questions from the 50-question bank and displays results afterward. Use the scenarios to test how you trace endpoint attachment, interpret APIC faults, and reason about policy and maintenance decisions; review any missed items against the relevant ACI behavior.

Preparation tips

  • Trace a sample endpoint from its leaf interface through access policy and endpoint-group attachment, noting where a mismatch could interrupt policy application.
  • Compare configuration faults with physical link faults; identify the APIC evidence that distinguishes policy state from interface or connectivity state.
  • Practice locating learned endpoint details, including the hosting leaf and interface, and connect that information to bridge-domain and subnet behavior.
  • Before considering an upgrade or policy change, map the maintenance sequence, affected switches, validation findings, and recovery configuration available.
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