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Cisco 350-501 Practice Test 88

Question 870

After Bluebird Infrastructure deploys Python GET response handling to read router status via REST API without assuming every request succeeds, the primary acceptance check passes (successful responses yield expected fields while failures generate explicit errors). What remaining operational risk should still be part of the design review?

  1. Token expiration and rotation must be handled without weakening auditability.
  2. Retry policy must avoid flooding a degraded control-plane endpoint.
  3. Not every model path supports ON_CHANGE semantics.
  4. Operational cutover must preserve critical fault monitoring continuity.

Explanation

Correct Answer

B:

The relevant boundary of Python GET response handling is that retry policy must avoid flooding a degraded control-plane endpoint. Passing the acceptance test does not eliminate this residual operational risk.

Incorrect Answers

A:

This concern applies to API bearer token scope in a different scenario where operators need to authenticate a network automation script without embedding broad shared passwords. For the deployed Python GET response handling approach, the relevant caution is instead that retry policy must avoid flooding a degraded control-plane endpoint.

C:

This concern applies to gNMI ON_CHANGE subscription in a different scenario where operators need to receive notifications only when eligible operational state leaves change. For the deployed Python GET response handling approach, the relevant caution is instead that retry policy must avoid flooding a degraded control-plane endpoint.

D:

This concern applies to SNMP community versus user model in a different scenario where operators need to remove shared plaintext-community access from a sensitive provider management network. For the deployed Python GET response handling approach, the relevant caution is instead that retry policy must avoid flooding a degraded control-plane endpoint.

Question 871

Horizon Exchange must create a service resource using the documented REST API method. The operator is comparing several service-provider methods. Which design or control directly addresses that stated requirement?

  1. HTTP 429 rate-limit handling
  2. sampled NetFlow capacity
  3. API POST creation workflow
  4. RESTCONF PATCH partial update

Explanation

Correct Answer

C:

API POST creation workflow matches this requirement: the team should send a validated POST payload with correct media type and authorization. A relevant outcome would be that the API returns the documented creation status and resource identity.

Incorrect Answers

A:

HTTP 429 rate-limit handling instead addresses a different condition: prevent a telemetry collection script from exceeding API request quotas. It would instead require you to respect 429 responses and the server's Retry-After or documented backoff policy, not the stated goal to create a service resource using the documented REST API method.

B:

sampled NetFlow capacity instead addresses a different condition: reduce accounting overhead on a high-rate provider interface. It would instead require you to configure supported sampled NetFlow with a documented sampling rate, not the stated goal to create a service resource using the documented REST API method.

D:

RESTCONF PATCH partial update instead addresses a different condition: modify a particular YANG-modeled setting without replacing the entire resource. It would instead require you to use an appropriate supported RESTCONF PATCH or PUT operation with precise target path, not the stated goal to create a service resource using the documented REST API method.

Question 872

At Cedar Wireless, the engineering change is approved for API POST creation workflow. The specific goal is to create a service resource using the documented REST API method. Which implementation step belongs in this change plan?

  1. Respect 429 responses and the server's Retry-After or documented backoff policy.
  2. Configure supported sampled NetFlow with a documented sampling rate.
  3. Use an appropriate supported RESTCONF PATCH or PUT operation with precise target path.
  4. Send a validated POST payload with correct media type and authorization.

Explanation

Correct Answer

D:

Implementing API POST creation workflow requires the operator to send a validated POST payload with correct media type and authorization. This makes the required goal testable using evidence that the API returns the documented creation status and resource identity.

Incorrect Answers

A:

The proposed step is for HTTP 429 rate-limit handling, whose purpose is to prevent a telemetry collection script from exceeding API request quotas. It would not perform the necessary API POST creation workflow operation: send a validated POST payload with correct media type and authorization.

B:

The proposed step is for sampled NetFlow capacity, whose purpose is to reduce accounting overhead on a high-rate provider interface. It would not perform the necessary API POST creation workflow operation: send a validated POST payload with correct media type and authorization.

C:

The proposed step is for RESTCONF PATCH partial update, whose purpose is to modify a particular YANG-modeled setting without replacing the entire resource. It would not perform the necessary API POST creation workflow operation: send a validated POST payload with correct media type and authorization.

Question 873

Willow Regional has deployed API POST creation workflow to create a service resource using the documented REST API method. The implementation step was to send a validated POST payload with correct media type and authorization. Which observation demonstrates that the requested service is working?

  1. The API returns the documented creation status and resource identity.
  2. The client reduces request frequency and succeeds after the rate limit interval.
  3. The collector reports sampled records with appropriate scaling and coverage.
  4. Only intended resource fields change and API response confirms success.

Explanation

Correct Answer

A:

For API POST creation workflow, successful verification means that the API returns the documented creation status and resource identity. That evidence directly tests whether the provider can create a service resource using the documented REST API method after deployment.

Incorrect Answers

B:

The observation would verify HTTP 429 rate-limit handling under the separate requirement to prevent a telemetry collection script from exceeding API request quotas. It does not demonstrate the needed API POST creation workflow result: the API returns the documented creation status and resource identity.

C:

The observation would verify sampled NetFlow capacity under the separate requirement to reduce accounting overhead on a high-rate provider interface. It does not demonstrate the needed API POST creation workflow result: the API returns the documented creation status and resource identity.

D:

The observation would verify RESTCONF PATCH partial update under the separate requirement to modify a particular YANG-modeled setting without replacing the entire resource. It does not demonstrate the needed API POST creation workflow result: the API returns the documented creation status and resource identity.

Question 874

While troubleshooting API POST creation workflow at Atlas Backbone, the intended acceptance outcome is still missing: the API returns the documented creation status and resource identity. Which fault condition should be investigated first for this particular design?

  1. The script immediately retries every failed call in a tight loop.
  2. A GET request is sent expecting it to create a new network object.
  3. Every packet is assumed to produce one complete flow record despite sampling.
  4. An unrestricted DELETE is used when a one-field update is needed.

Explanation

Correct Answer

B:

The suspected defect directly frustrates API POST creation workflow: a GET request is sent expecting it to create a new network object. Correcting it should allow verification that the API returns the documented creation status and resource identity.

Incorrect Answers

A:

This defect belongs to HTTP 429 rate-limit handling, where the affected outcome is to prevent a telemetry collection script from exceeding API request quotas. It is not the direct failure mode identified for the API POST creation workflow design in this case: a GET request is sent expecting it to create a new network object.

C:

This defect belongs to sampled NetFlow capacity, where the affected outcome is to reduce accounting overhead on a high-rate provider interface. It is not the direct failure mode identified for the API POST creation workflow design in this case: a GET request is sent expecting it to create a new network object.

D:

This defect belongs to RESTCONF PATCH partial update, where the affected outcome is to modify a particular YANG-modeled setting without replacing the entire resource. It is not the direct failure mode identified for the API POST creation workflow design in this case: a GET request is sent expecting it to create a new network object.

Question 875

After Starlight IP Services deploys API POST creation workflow to create a service resource using the documented REST API method, the primary acceptance check passes (the API returns the documented creation status and resource identity). What remaining operational risk should still be part of the design review?

  1. Rate limiting may still require global coordination among multiple workers.
  2. Sampling introduces estimation error for short or sparse flows.
  3. Repeating a nonidempotent POST can create unintended duplicate objects.
  4. RESTCONF PATCH support and media types vary by platform release.

Explanation

Correct Answer

C:

The relevant boundary of API POST creation workflow is that repeating a nonidempotent POST can create unintended duplicate objects. Passing the acceptance test does not eliminate this residual operational risk.

Incorrect Answers

A:

This concern applies to HTTP 429 rate-limit handling in a different scenario where operators need to prevent a telemetry collection script from exceeding API request quotas. For the deployed API POST creation workflow approach, the relevant caution is instead that repeating a nonidempotent POST can create unintended duplicate objects.

B:

This concern applies to sampled NetFlow capacity in a different scenario where operators need to reduce accounting overhead on a high-rate provider interface. For the deployed API POST creation workflow approach, the relevant caution is instead that repeating a nonidempotent POST can create unintended duplicate objects.

D:

This concern applies to RESTCONF PATCH partial update in a different scenario where operators need to modify a particular YANG-modeled setting without replacing the entire resource. For the deployed API POST creation workflow approach, the relevant caution is instead that repeating a nonidempotent POST can create unintended duplicate objects.

Question 876

Northstar Carrier must authenticate a network automation script without embedding broad shared passwords. The operator is comparing several service-provider methods. Which design or control directly addresses that stated requirement?

  1. Python GET response handling
  2. YANG list key uniqueness
  3. gNMI ON_CHANGE subscription
  4. API bearer token scope

Explanation

Correct Answer

D:

API bearer token scope matches this requirement: the team should supply a scoped bearer token over TLS and restrict access to required endpoints. A relevant outcome would be that authorized operations succeed while unrelated administrative calls are denied.

Incorrect Answers

A:

Python GET response handling instead addresses a different condition: read router status via REST API without assuming every request succeeds. It would instead require you to issue a GET request with timeout and validate the HTTP response before parsing, not the stated goal to authenticate a network automation script without embedding broad shared passwords.

B:

YANG list key uniqueness instead addresses a different condition: model several ordered or keyed interface entries without ambiguous instance paths. It would instead require you to define a YANG list with a suitable unique key leaf for each instance, not the stated goal to authenticate a network automation script without embedding broad shared passwords.

C:

gNMI ON_CHANGE subscription instead addresses a different condition: receive notifications only when eligible operational state leaves change. It would instead require you to configure ON_CHANGE for supported state paths rather than fixed polling, not the stated goal to authenticate a network automation script without embedding broad shared passwords.

Question 877

At Orion Transit, the engineering change is approved for API bearer token scope. The specific goal is to authenticate a network automation script without embedding broad shared passwords. Which implementation step belongs in this change plan?

  1. Supply a scoped bearer token over TLS and restrict access to required endpoints.
  2. Issue a GET request with timeout and validate the HTTP response before parsing.
  3. Define a YANG list with a suitable unique key leaf for each instance.
  4. Configure ON_CHANGE for supported state paths rather than fixed polling.

Explanation

Correct Answer

A:

Implementing API bearer token scope requires the operator to supply a scoped bearer token over TLS and restrict access to required endpoints. This makes the required goal testable using evidence that authorized operations succeed while unrelated administrative calls are denied.

Incorrect Answers

B:

The proposed step is for Python GET response handling, whose purpose is to read router status via REST API without assuming every request succeeds. It would not perform the necessary API bearer token scope operation: supply a scoped bearer token over TLS and restrict access to required endpoints.

C:

The proposed step is for YANG list key uniqueness, whose purpose is to model several ordered or keyed interface entries without ambiguous instance paths. It would not perform the necessary API bearer token scope operation: supply a scoped bearer token over TLS and restrict access to required endpoints.

D:

The proposed step is for gNMI ON_CHANGE subscription, whose purpose is to receive notifications only when eligible operational state leaves change. It would not perform the necessary API bearer token scope operation: supply a scoped bearer token over TLS and restrict access to required endpoints.

Question 878

Meridian Networks has deployed API bearer token scope to authenticate a network automation script without embedding broad shared passwords. The implementation step was to supply a scoped bearer token over TLS and restrict access to required endpoints. Which observation demonstrates that the requested service is working?

  1. Successful responses yield expected fields while failures generate explicit errors.
  2. Authorized operations succeed while unrelated administrative calls are denied.
  3. Clients can address one specific modeled entry by its stable key.
  4. The collector gets an event when the operational leaf changes.

Explanation

Correct Answer

B:

For API bearer token scope, successful verification means that authorized operations succeed while unrelated administrative calls are denied. That evidence directly tests whether the provider can authenticate a network automation script without embedding broad shared passwords after deployment.

Incorrect Answers

A:

The observation would verify Python GET response handling under the separate requirement to read router status via REST API without assuming every request succeeds. It does not demonstrate the needed API bearer token scope result: authorized operations succeed while unrelated administrative calls are denied.

C:

The observation would verify YANG list key uniqueness under the separate requirement to model several ordered or keyed interface entries without ambiguous instance paths. It does not demonstrate the needed API bearer token scope result: authorized operations succeed while unrelated administrative calls are denied.

D:

The observation would verify gNMI ON_CHANGE subscription under the separate requirement to receive notifications only when eligible operational state leaves change. It does not demonstrate the needed API bearer token scope result: authorized operations succeed while unrelated administrative calls are denied.

Question 879

While troubleshooting API bearer token scope at Kestrel Broadband, the intended acceptance outcome is still missing: authorized operations succeed while unrelated administrative calls are denied. Which fault condition should be investigated first for this particular design?

  1. The script assumes success and indexes a nonexistent response body on HTTP failure.
  2. Repeated unkeyed list elements are used where unique instance lookup is required.
  3. The token is exposed in query parameters or committed source files.
  4. SAMPLE polling is treated as proof the update was event-triggered.

Explanation

Correct Answer

C:

The suspected defect directly frustrates API bearer token scope: the token is exposed in query parameters or committed source files. Correcting it should allow verification that authorized operations succeed while unrelated administrative calls are denied.

Incorrect Answers

A:

This defect belongs to Python GET response handling, where the affected outcome is to read router status via REST API without assuming every request succeeds. It is not the direct failure mode identified for the API bearer token scope design in this case: the token is exposed in query parameters or committed source files.

B:

This defect belongs to YANG list key uniqueness, where the affected outcome is to model several ordered or keyed interface entries without ambiguous instance paths. It is not the direct failure mode identified for the API bearer token scope design in this case: the token is exposed in query parameters or committed source files.

D:

This defect belongs to gNMI ON_CHANGE subscription, where the affected outcome is to receive notifications only when eligible operational state leaves change. It is not the direct failure mode identified for the API bearer token scope design in this case: the token is exposed in query parameters or committed source files.

Question 880

After Harbor Metro deploys API bearer token scope to authenticate a network automation script without embedding broad shared passwords, the primary acceptance check passes (authorized operations succeed while unrelated administrative calls are denied). What remaining operational risk should still be part of the design review?

  1. Retry policy must avoid flooding a degraded control-plane endpoint.
  2. Key changes may alter API resource identities and automation references.
  3. Not every model path supports ON_CHANGE semantics.
  4. Token expiration and rotation must be handled without weakening auditability.

Explanation

Correct Answer

D:

The relevant boundary of API bearer token scope is that token expiration and rotation must be handled without weakening auditability. Passing the acceptance test does not eliminate this residual operational risk.

Incorrect Answers

A:

This concern applies to Python GET response handling in a different scenario where operators need to read router status via REST API without assuming every request succeeds. For the deployed API bearer token scope approach, the relevant caution is instead that token expiration and rotation must be handled without weakening auditability.

B:

This concern applies to YANG list key uniqueness in a different scenario where operators need to model several ordered or keyed interface entries without ambiguous instance paths. For the deployed API bearer token scope approach, the relevant caution is instead that token expiration and rotation must be handled without weakening auditability.

C:

This concern applies to gNMI ON_CHANGE subscription in a different scenario where operators need to receive notifications only when eligible operational state leaves change. For the deployed API bearer token scope approach, the relevant caution is instead that token expiration and rotation must be handled without weakening auditability.


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