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DevNet Associate (DEVASC) 200-901 Practice Test 54

Question 530

The initial implementation fails or does not meet the expected behavior. A source-of-truth generator sends invalid VLAN IDs to multiple switches because device limits were never represented in its data model. Which investigation should be prioritized to diagnose the problem?

  1. Inspect schema mandatory statements, validation path and returned error.
  2. Inspect service facts, task parameters and service manager status.
  3. Inspect data-model range definitions, validation error and device commit history.
  4. Inspect the declared leaf-list type and encoded JSON or XML representation.

Explanation

Correct Answer

C:

Inspect data-model range definitions, validation error and device commit history. These are the relevant initial evidence checks for Validate interface constraints before rollout. Intended action: Validate intended configuration against a supported YANG/schema and platform capability constraints before applying changes. Expected success condition: Out-of-range VLAN values fail preflight and no target switch receives the invalid configuration.

Incorrect Answers

A:

Inspect schema mandatory statements, validation path and returned error. This investigation primarily applies to Interpret YANG mandatory leaf, not the current Validate interface constraints before rollout problem. Prioritize: Inspect data-model range definitions, validation error and device commit history.

B:

Inspect service facts, task parameters and service manager status. This investigation primarily applies to Ansible service started and enabled, not the current Validate interface constraints before rollout problem. Prioritize: Inspect data-model range definitions, validation error and device commit history.

D:

Inspect the declared leaf-list type and encoded JSON or XML representation. This investigation primarily applies to Interpret YANG leaf-list of DNS servers, not the current Validate interface constraints before rollout problem. Prioritize: Inspect data-model range definitions, validation error and device commit history.

Question 531

A Cisco network automation team has this requirement: A company must update guest access policies on hundreds of Meraki networks and proposes SSH scripting every AP individually. Which design or implementation action best addresses it?

  1. Define the supported infrastructure in version-controlled Terraform configuration and apply reviewed plans.
  2. Interpret the minus as removal of the Telnet permit and plus as introduction of a deny in the versioned policy text.
  3. Run a drift-aware plan against current resources and review an approved reconciliation action.
  4. Use the supported controller-level network policy API to apply the intended configuration at the correct scope.

Explanation

Correct Answer

D:

Use the supported controller-level network policy API to apply the intended configuration at the correct scope. Technical reason: Controller-level management applies abstract policy across centrally managed devices. Verify by: A sample of networks shows consistent guest access policy after the controller operation and local device convergence. Deployment qualification: Scope of change and controller permissions must be checked before bulk operations.

Incorrect Answers

A:

Define the supported infrastructure in version-controlled Terraform configuration and apply reviewed plans. This instead targets the different case Terraform declared state for repeatable sites. The described Controller-level Wi-Fi policy at multiple sites requirement specifically calls for Use the supported controller-level network policy API to apply the intended configuration at the correct scope.

B:

Interpret the minus as removal of the Telnet permit and plus as introduction of a deny in the versioned policy text. This instead targets the different case Unified diff shows removed firewall allowance. The described Controller-level Wi-Fi policy at multiple sites requirement specifically calls for Use the supported controller-level network policy API to apply the intended configuration at the correct scope.

C:

Run a drift-aware plan against current resources and review an approved reconciliation action. This instead targets the different case Detect drift with planned IaC comparison. The described Controller-level Wi-Fi policy at multiple sites requirement specifically calls for Use the supported controller-level network policy API to apply the intended configuration at the correct scope.

Question 532

After deployment, an engineer must prove the proposed solution works. A company must update guest access policies on hundreds of Meraki networks and proposes SSH scripting every AP individually. Which observed result is the most direct acceptance evidence?

  1. After execution, nginx package is present and a repeat run usually reports unchanged.
  2. The validator rejects key-only data and accepts the object containing the mandatory field.
  3. Two independently built test environments show matching expected VPC/subnet/network properties.
  4. A sample of networks shows consistent guest access policy after the controller operation and local device convergence.

Explanation

Correct Answer

D:

A sample of networks shows consistent guest access policy after the controller operation and local device convergence. Recommended implementation: Use the supported controller-level network policy API to apply the intended configuration at the correct scope. Why the observation matters: Controller-level management applies abstract policy across centrally managed devices.

Incorrect Answers

A:

After execution, nginx package is present and a repeat run usually reports unchanged. That observation could confirm Ansible package installation state, not the current Controller-level Wi-Fi policy at multiple sites case. For this case, the decisive observation is: A sample of networks shows consistent guest access policy after the controller operation and local device convergence.

B:

The validator rejects key-only data and accepts the object containing the mandatory field. That observation could confirm Interpret YANG mandatory leaf, not the current Controller-level Wi-Fi policy at multiple sites case. For this case, the decisive observation is: A sample of networks shows consistent guest access policy after the controller operation and local device convergence.

C:

Two independently built test environments show matching expected VPC/subnet/network properties. That observation could confirm Terraform declared state for repeatable sites, not the current Controller-level Wi-Fi policy at multiple sites case. For this case, the decisive observation is: A sample of networks shows consistent guest access policy after the controller operation and local device convergence.

Question 533

A developer is explaining the underlying technical behavior. A company must update guest access policies on hundreds of Meraki networks and proposes SSH scripting every AP individually. Which principle is most relevant to this case?

  1. Controller inventory APIs can return operational attributes without modifying managed state.
  2. IaC plan compares declared desired state with discovered provider resources and tracked state.
  3. Controller-level management applies abstract policy across centrally managed devices.
  4. Network simulation provides a safe environment for examining design behavior before live deployment.

Explanation

Correct Answer

C:

Controller-level management applies abstract policy across centrally managed devices. This mechanism explains Controller-level Wi-Fi policy at multiple sites. Action: Use the supported controller-level network policy API to apply the intended configuration at the correct scope. Expected confirmation: A sample of networks shows consistent guest access policy after the controller operation and local device convergence.

Incorrect Answers

A:

Controller inventory APIs can return operational attributes without modifying managed state. This relates to Interpret Catalyst Center device health report. In the current Controller-level Wi-Fi policy at multiple sites case the operative principle is: Controller-level management applies abstract policy across centrally managed devices.

B:

IaC plan compares declared desired state with discovered provider resources and tracked state. This relates to Detect drift with planned IaC comparison. In the current Controller-level Wi-Fi policy at multiple sites case the operative principle is: Controller-level management applies abstract policy across centrally managed devices.

D:

Network simulation provides a safe environment for examining design behavior before live deployment. This relates to Cisco Modeling Labs topology before production change. In the current Controller-level Wi-Fi policy at multiple sites case the operative principle is: Controller-level management applies abstract policy across centrally managed devices.

Question 534

A team does not apply the necessary control or correction. A company must update guest access policies on hundreds of Meraki networks and proposes SSH scripting every AP individually. Which resulting failure or risk is most directly relevant?

  1. Direct per-device edits can be overwritten or create inconsistent centrally managed state.
  2. Confusing a device setting with transport status can invert monitoring alerts.
  3. Ignoring failed network tests can spread an outage despite available detection.
  4. Skipping mandatory modeled values produces invalid configuration despite an authentic session.

Explanation

Correct Answer

A:

Direct per-device edits can be overwritten or create inconsistent centrally managed state. This is the direct exposure for Controller-level Wi-Fi policy at multiple sites. Mitigate with: Use the supported controller-level network policy API to apply the intended configuration at the correct scope. Check success by: A sample of networks shows consistent guest access policy after the controller operation and local device convergence.

Incorrect Answers

B:

Confusing a device setting with transport status can invert monitoring alerts. This risk occurs in the different Interpret RESTCONF HTTP 200 resource data situation. For the given Controller-level Wi-Fi policy at multiple sites requirement, the directly relevant risk is: Direct per-device edits can be overwritten or create inconsistent centrally managed state.

C:

Ignoring failed network tests can spread an outage despite available detection. This risk occurs in the different Block a network rollout on failed pyATS checks situation. For the given Controller-level Wi-Fi policy at multiple sites requirement, the directly relevant risk is: Direct per-device edits can be overwritten or create inconsistent centrally managed state.

D:

Skipping mandatory modeled values produces invalid configuration despite an authentic session. This risk occurs in the different Interpret YANG mandatory leaf situation. For the given Controller-level Wi-Fi policy at multiple sites requirement, the directly relevant risk is: Direct per-device edits can be overwritten or create inconsistent centrally managed state.

Question 535

The initial implementation fails or does not meet the expected behavior. A company must update guest access policies on hundreds of Meraki networks and proposes SSH scripting every AP individually. Which investigation should be prioritized to diagnose the problem?

  1. Inspect organization/network policy, controller task status and representative AP behavior.
  2. Inspect service facts, task parameters and service manager status.
  3. Inspect test exit codes, stage dependencies and promotion logs.
  4. Inspect resource path, HTTP method, module data and the absence of PATCH/PUT/POST.

Explanation

Correct Answer

A:

Inspect organization/network policy, controller task status and representative AP behavior. These are the relevant initial evidence checks for Controller-level Wi-Fi policy at multiple sites. Intended action: Use the supported controller-level network policy API to apply the intended configuration at the correct scope. Expected success condition: A sample of networks shows consistent guest access policy after the controller operation and local device convergence.

Incorrect Answers

B:

Inspect service facts, task parameters and service manager status. This investigation primarily applies to Ansible service started and enabled, not the current Controller-level Wi-Fi policy at multiple sites problem. Prioritize: Inspect organization/network policy, controller task status and representative AP behavior.

C:

Inspect test exit codes, stage dependencies and promotion logs. This investigation primarily applies to Block a network rollout on failed pyATS checks, not the current Controller-level Wi-Fi policy at multiple sites problem. Prioritize: Inspect organization/network policy, controller task status and representative AP behavior.

D:

Inspect resource path, HTTP method, module data and the absence of PATCH/PUT/POST. This investigation primarily applies to Interpret RESTCONF configuration retrieval, not the current Controller-level Wi-Fi policy at multiple sites problem. Prioritize: Inspect organization/network policy, controller task status and representative AP behavior.

Question 536

A Cisco network automation team has this requirement: A lab router not enrolled in a central controller needs a one-off interface operational counter for troubleshooting. Which design or implementation action best addresses it?

  1. Classify the script as a read-only managed-device inventory/health report rather than an interface configuration updater.
  2. Use pyATS/Genie structured parsing and automated comparison for relevant learned routes and interfaces.
  3. Use a supported device-level read API such as IOS XE RESTCONF for that router rather than assuming controller inventory exists.
  4. Distinguish unchanged context lines from added and removed lines when assessing the patch.

Explanation

Correct Answer

C:

Use a supported device-level read API such as IOS XE RESTCONF for that router rather than assuming controller inventory exists. Technical reason: Device APIs expose local state even when no controller owns its management policy. Verify by: The router returns the exact interface counter without affecting other devices. Deployment qualification: Device API access requires reachability, enabled services and a permitted account.

Incorrect Answers

A:

Classify the script as a read-only managed-device inventory/health report rather than an interface configuration updater. This instead targets the different case Interpret Catalyst Center device health report. The described Device-level interface test outside controller policy requirement specifically calls for Use a supported device-level read API such as IOS XE RESTCONF for that router rather than assuming controller inventory exists.

B:

Use pyATS/Genie structured parsing and automated comparison for relevant learned routes and interfaces. This instead targets the different case pyATS structured network state verification. The described Device-level interface test outside controller policy requirement specifically calls for Use a supported device-level read API such as IOS XE RESTCONF for that router rather than assuming controller inventory exists.

D:

Distinguish unchanged context lines from added and removed lines when assessing the patch. This instead targets the different case Unified diff context versus change lines. The described Device-level interface test outside controller policy requirement specifically calls for Use a supported device-level read API such as IOS XE RESTCONF for that router rather than assuming controller inventory exists.

Question 537

After deployment, an engineer must prove the proposed solution works. A lab router not enrolled in a central controller needs a one-off interface operational counter for troubleshooting. Which observed result is the most direct acceptance evidence?

  1. Validation accepts the two values without inventing child element names.
  2. The validator rejects key-only data and accepts the object containing the mandatory field.
  3. After execution, nginx package is present and a repeat run usually reports unchanged.
  4. The router returns the exact interface counter without affecting other devices.

Explanation

Correct Answer

D:

The router returns the exact interface counter without affecting other devices. Recommended implementation: Use a supported device-level read API such as IOS XE RESTCONF for that router rather than assuming controller inventory exists. Why the observation matters: Device APIs expose local state even when no controller owns its management policy.

Incorrect Answers

A:

Validation accepts the two values without inventing child element names. That observation could confirm Interpret YANG leaf-list of DNS servers, not the current Device-level interface test outside controller policy case. For this case, the decisive observation is: The router returns the exact interface counter without affecting other devices.

B:

The validator rejects key-only data and accepts the object containing the mandatory field. That observation could confirm Interpret YANG mandatory leaf, not the current Device-level interface test outside controller policy case. For this case, the decisive observation is: The router returns the exact interface counter without affecting other devices.

C:

After execution, nginx package is present and a repeat run usually reports unchanged. That observation could confirm Ansible package installation state, not the current Device-level interface test outside controller policy case. For this case, the decisive observation is: The router returns the exact interface counter without affecting other devices.

Question 538

A developer is explaining the underlying technical behavior. A lab router not enrolled in a central controller needs a one-off interface operational counter for troubleshooting. Which principle is most relevant to this case?

  1. Controller inventory APIs can return operational attributes without modifying managed state.
  2. Meraki client APIs report observed endpoint activity scoped to networks and time windows.
  3. Device APIs expose local state even when no controller owns its management policy.
  4. Simulation tests system dynamics; test frameworks provide machine-checked acceptance evidence.

Explanation

Correct Answer

C:

Device APIs expose local state even when no controller owns its management policy. This mechanism explains Device-level interface test outside controller policy. Action: Use a supported device-level read API such as IOS XE RESTCONF for that router rather than assuming controller inventory exists. Expected confirmation: The router returns the exact interface counter without affecting other devices.

Incorrect Answers

A:

Controller inventory APIs can return operational attributes without modifying managed state. This relates to Interpret Catalyst Center device health report. In the current Device-level interface test outside controller policy case the operative principle is: Device APIs expose local state even when no controller owns its management policy.

B:

Meraki client APIs report observed endpoint activity scoped to networks and time windows. This relates to Interpret Meraki Python client count workflow. In the current Device-level interface test outside controller policy case the operative principle is: Device APIs expose local state even when no controller owns its management policy.

D:

Simulation tests system dynamics; test frameworks provide machine-checked acceptance evidence. This relates to CML and pyATS roles in preflight. In the current Device-level interface test outside controller policy case the operative principle is: Device APIs expose local state even when no controller owns its management policy.

Question 539

A team does not apply the necessary control or correction. A lab router not enrolled in a central controller needs a one-off interface operational counter for troubleshooting. Which resulting failure or risk is most directly relevant?

  1. Misreading the loop as device provisioning could lead an analyst to trust an irrelevant count.
  2. Misreading the command can lead to premature deletion or underestimated storage recovery.
  3. CLI regex-only logic can fail silently when human-readable command output changes.
  4. Querying an unrelated controller could give incomplete or stale device state.

Explanation

Correct Answer

D:

Querying an unrelated controller could give incomplete or stale device state. This is the direct exposure for Device-level interface test outside controller policy. Mitigate with: Use a supported device-level read API such as IOS XE RESTCONF for that router rather than assuming controller inventory exists. Check success by: The router returns the exact interface counter without affecting other devices.

Incorrect Answers

A:

Misreading the loop as device provisioning could lead an analyst to trust an irrelevant count. This risk occurs in the different Interpret Meraki Python client count workflow situation. For the given Device-level interface test outside controller policy requirement, the directly relevant risk is: Querying an unrelated controller could give incomplete or stale device state.

B:

Misreading the command can lead to premature deletion or underestimated storage recovery. This risk occurs in the different Bash script conditional cleanup workflow situation. For the given Device-level interface test outside controller policy requirement, the directly relevant risk is: Querying an unrelated controller could give incomplete or stale device state.

C:

CLI regex-only logic can fail silently when human-readable command output changes. This risk occurs in the different Desired-state YANG instead of CLI scraping situation. For the given Device-level interface test outside controller policy requirement, the directly relevant risk is: Querying an unrelated controller could give incomplete or stale device state.

Question 540

The initial implementation fails or does not meet the expected behavior. A lab router not enrolled in a central controller needs a one-off interface operational counter for troubleshooting. Which investigation should be prioritized to diagnose the problem?

  1. Inspect schema mandatory statements, validation path and returned error.
  2. Inspect router address, RESTCONF model path and operational-state response.
  3. Inspect provider resources, Ansible tasks and execution ordering.
  4. Inspect the declared leaf-list type and encoded JSON or XML representation.

Explanation

Correct Answer

B:

Inspect router address, RESTCONF model path and operational-state response. These are the relevant initial evidence checks for Device-level interface test outside controller policy. Intended action: Use a supported device-level read API such as IOS XE RESTCONF for that router rather than assuming controller inventory exists. Expected success condition: The router returns the exact interface counter without affecting other devices.

Incorrect Answers

A:

Inspect schema mandatory statements, validation path and returned error. This investigation primarily applies to Interpret YANG mandatory leaf, not the current Device-level interface test outside controller policy problem. Prioritize: Inspect router address, RESTCONF model path and operational-state response.

C:

Inspect provider resources, Ansible tasks and execution ordering. This investigation primarily applies to Terraform versus Ansible responsibilities, not the current Device-level interface test outside controller policy problem. Prioritize: Inspect router address, RESTCONF model path and operational-state response.

D:

Inspect the declared leaf-list type and encoded JSON or XML representation. This investigation primarily applies to Interpret YANG leaf-list of DNS servers, not the current Device-level interface test outside controller policy problem. Prioritize: Inspect router address, RESTCONF model path and operational-state response.

DevNet Associate (DEVASC) (200-901) Practice Tests

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