Question 980
After Starlight IP Services deploys NETCONF candidate validation to check a staged routing configuration before affecting the active running datastore, the primary acceptance check passes (invalid candidate changes are rejected before impacting forwarding). What remaining operational risk should still be part of the design review?
- RESTCONF PATCH support and media types vary by platform release.
- Token expiration and rotation must be handled without weakening auditability.
- Subscription cadence and available paths depend on target implementation.
- NETCONF datastore capabilities are learned from server hello exchange.
Explanation
Correct Answer
D:The relevant boundary of NETCONF candidate validation is that NETCONF datastore capabilities are learned from server hello exchange. Passing the acceptance test does not eliminate this residual operational risk.
Incorrect Answers
A: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 NETCONF candidate validation approach, the relevant caution is instead that NETCONF datastore capabilities are learned from server hello exchange.
B: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 NETCONF candidate validation approach, the relevant caution is instead that NETCONF datastore capabilities are learned from server hello exchange.
C:This concern applies to gNMI streaming subscription in a different scenario where operators need to collect continuously updated interface telemetry from a router without repeated shell polling. For the deployed NETCONF candidate validation approach, the relevant caution is instead that NETCONF datastore capabilities are learned from server hello exchange.
Question 981
Northstar Carrier must change only a specified modelled interface parameter using the device's NETCONF service. The operator is comparing several service-provider methods. Which design or control directly addresses that stated requirement?
- NETCONF interface edit scope
- NETCONF candidate validation
- Terraform state consistency
- Terraform plan before apply
Explanation
Correct Answer
A:NETCONF interface edit scope matches this requirement: the team should send an edit-config operation scoped to the correct YANG data path. A relevant outcome would be that the specified interface leaf changes while unrelated nodes retain their values.
Incorrect Answers
B:NETCONF candidate validation instead addresses a different condition: check a staged routing configuration before affecting the active running datastore. It would instead require you to use candidate edit validate and commit semantics where supported, not the stated goal to change only a specified modelled interface parameter using the device's NETCONF service.
C:Terraform state consistency instead addresses a different condition: track provisioned infrastructure objects and detect changes against code. It would instead require you to use controlled Terraform state with secure remote locking and versioning, not the stated goal to change only a specified modelled interface parameter using the device's NETCONF service.
D:Terraform plan before apply instead addresses a different condition: review configuration impact before making a broad service-provider change. It would instead require you to generate and approve the infrastructure plan prior to applying, not the stated goal to change only a specified modelled interface parameter using the device's NETCONF service.
Question 982
At Orion Transit, the engineering change is approved for NETCONF interface edit scope. The specific goal is to change only a specified modelled interface parameter using the device's NETCONF service. Which implementation step belongs in this change plan?
- Use candidate edit validate and commit semantics where supported.
- Send an edit-config operation scoped to the correct YANG data path.
- Use controlled Terraform state with secure remote locking and versioning.
- Generate and approve the infrastructure plan prior to applying.
Explanation
Correct Answer
B:Implementing NETCONF interface edit scope requires the operator to send an edit-config operation scoped to the correct YANG data path. This makes the required goal testable using evidence that the specified interface leaf changes while unrelated nodes retain their values.
Incorrect Answers
A:The proposed step is for NETCONF candidate validation, whose purpose is to check a staged routing configuration before affecting the active running datastore. It would not perform the necessary NETCONF interface edit scope operation: send an edit-config operation scoped to the correct YANG data path.
C:The proposed step is for Terraform state consistency, whose purpose is to track provisioned infrastructure objects and detect changes against code. It would not perform the necessary NETCONF interface edit scope operation: send an edit-config operation scoped to the correct YANG data path.
D:The proposed step is for Terraform plan before apply, whose purpose is to review configuration impact before making a broad service-provider change. It would not perform the necessary NETCONF interface edit scope operation: send an edit-config operation scoped to the correct YANG data path.
Question 983
Meridian Networks has deployed NETCONF interface edit scope to change only a specified modelled interface parameter using the device's NETCONF service. The implementation step was to send an edit-config operation scoped to the correct YANG data path. Which observation demonstrates that the requested service is working?
- Invalid candidate changes are rejected before impacting forwarding.
- Plans reference the current managed object identities without conflicting state writes.
- The specified interface leaf changes while unrelated nodes retain their values.
- The reviewed plan enumerates proposed create update and delete operations.
Explanation
Correct Answer
C:For NETCONF interface edit scope, successful verification means that the specified interface leaf changes while unrelated nodes retain their values. That evidence directly tests whether the provider can change only a specified modelled interface parameter using the device's NETCONF service after deployment.
Incorrect Answers
A:The observation would verify NETCONF candidate validation under the separate requirement to check a staged routing configuration before affecting the active running datastore. It does not demonstrate the needed NETCONF interface edit scope result: the specified interface leaf changes while unrelated nodes retain their values.
B:The observation would verify Terraform state consistency under the separate requirement to track provisioned infrastructure objects and detect changes against code. It does not demonstrate the needed NETCONF interface edit scope result: the specified interface leaf changes while unrelated nodes retain their values.
D:The observation would verify Terraform plan before apply under the separate requirement to review configuration impact before making a broad service-provider change. It does not demonstrate the needed NETCONF interface edit scope result: the specified interface leaf changes while unrelated nodes retain their values.
Question 984
While troubleshooting NETCONF interface edit scope at Kestrel Broadband, the intended acceptance outcome is still missing: the specified interface leaf changes while unrelated nodes retain their values. Which fault condition should be investigated first for this particular design?
- The automation assumes every NETCONF target implements a separate candidate datastore.
- Two concurrent runners modify the same unsecured state file.
- An unreviewed apply destroys a shared routing resource.
- A broad replace operation deletes sibling configuration nodes unintentionally.
Explanation
Correct Answer
D:The suspected defect directly frustrates NETCONF interface edit scope: a broad replace operation deletes sibling configuration nodes unintentionally. Correcting it should allow verification that the specified interface leaf changes while unrelated nodes retain their values.
Incorrect Answers
A:This defect belongs to NETCONF candidate validation, where the affected outcome is to check a staged routing configuration before affecting the active running datastore. It is not the direct failure mode identified for the NETCONF interface edit scope design in this case: a broad replace operation deletes sibling configuration nodes unintentionally.
B:This defect belongs to Terraform state consistency, where the affected outcome is to track provisioned infrastructure objects and detect changes against code. It is not the direct failure mode identified for the NETCONF interface edit scope design in this case: a broad replace operation deletes sibling configuration nodes unintentionally.
C:This defect belongs to Terraform plan before apply, where the affected outcome is to review configuration impact before making a broad service-provider change. It is not the direct failure mode identified for the NETCONF interface edit scope design in this case: a broad replace operation deletes sibling configuration nodes unintentionally.
Question 985
After Harbor Metro deploys NETCONF interface edit scope to change only a specified modelled interface parameter using the device's NETCONF service, the primary acceptance check passes (the specified interface leaf changes while unrelated nodes retain their values). What remaining operational risk should still be part of the design review?
- Patch semantics and module support must match the target router.
- NETCONF datastore capabilities are learned from server hello exchange.
- State may contain sensitive data requiring encryption and access policy.
- External drift can invalidate an earlier saved plan.
Explanation
Correct Answer
A:The relevant boundary of NETCONF interface edit scope is that patch semantics and module support must match the target router. Passing the acceptance test does not eliminate this residual operational risk.
Incorrect Answers
B:This concern applies to NETCONF candidate validation in a different scenario where operators need to check a staged routing configuration before affecting the active running datastore. For the deployed NETCONF interface edit scope approach, the relevant caution is instead that patch semantics and module support must match the target router.
C:This concern applies to Terraform state consistency in a different scenario where operators need to track provisioned infrastructure objects and detect changes against code. For the deployed NETCONF interface edit scope approach, the relevant caution is instead that patch semantics and module support must match the target router.
D:This concern applies to Terraform plan before apply in a different scenario where operators need to review configuration impact before making a broad service-provider change. For the deployed NETCONF interface edit scope approach, the relevant caution is instead that patch semantics and module support must match the target router.
Question 986
Summit Service Provider must modify a particular YANG-modeled setting without replacing the entire resource. The operator is comparing several service-provider methods. Which design or control directly addresses that stated requirement?
- NETCONF candidate validation
- RESTCONF PATCH partial update
- SNMPv3 authPriv requirements
- YANG operational versus config state
Explanation
Correct Answer
B:RESTCONF PATCH partial update matches this requirement: the team should use an appropriate supported RESTCONF PATCH or PUT operation with precise target path. A relevant outcome would be that only intended resource fields change and API response confirms success.
Incorrect Answers
A:NETCONF candidate validation instead addresses a different condition: check a staged routing configuration before affecting the active running datastore. It would instead require you to use candidate edit validate and commit semantics where supported, not the stated goal to modify a particular YANG-modeled setting without replacing the entire resource.
C:SNMPv3 authPriv requirements instead addresses a different condition: poll secure provider management counters with authentication and confidentiality. It would instead require you to configure SNMPv3 authPriv using current supported authenticated encryption settings, not the stated goal to modify a particular YANG-modeled setting without replacing the entire resource.
D:YANG operational versus config state instead addresses a different condition: separate a read-only interface counter from an editable interface configuration leaf. It would instead require you to use YANG config false operational nodes for observed state and config true nodes for settings, not the stated goal to modify a particular YANG-modeled setting without replacing the entire resource.
Question 987
At Ridgeway Networks, the engineering change is approved for RESTCONF PATCH partial update. The specific goal is to modify a particular YANG-modeled setting without replacing the entire resource. Which implementation step belongs in this change plan?
- Use candidate edit validate and commit semantics where supported.
- Configure SNMPv3 authPriv using current supported authenticated encryption settings.
- Use an appropriate supported RESTCONF PATCH or PUT operation with precise target path.
- Use YANG config false operational nodes for observed state and config true nodes for settings.
Explanation
Correct Answer
C:Implementing RESTCONF PATCH partial update requires the operator to use an appropriate supported RESTCONF PATCH or PUT operation with precise target path. This makes the required goal testable using evidence that only intended resource fields change and API response confirms success.
Incorrect Answers
A:The proposed step is for NETCONF candidate validation, whose purpose is to check a staged routing configuration before affecting the active running datastore. It would not perform the necessary RESTCONF PATCH partial update operation: use an appropriate supported RESTCONF PATCH or PUT operation with precise target path.
B:The proposed step is for SNMPv3 authPriv requirements, whose purpose is to poll secure provider management counters with authentication and confidentiality. It would not perform the necessary RESTCONF PATCH partial update operation: use an appropriate supported RESTCONF PATCH or PUT operation with precise target path.
D:The proposed step is for YANG operational versus config state, whose purpose is to separate a read-only interface counter from an editable interface configuration leaf. It would not perform the necessary RESTCONF PATCH partial update operation: use an appropriate supported RESTCONF PATCH or PUT operation with precise target path.
Question 988
Lakeside Transport has deployed RESTCONF PATCH partial update to modify a particular YANG-modeled setting without replacing the entire resource. The implementation step was to use an appropriate supported RESTCONF PATCH or PUT operation with precise target path. Which observation demonstrates that the requested service is working?
- Invalid candidate changes are rejected before impacting forwarding.
- The NMS receives authorized data while unauthenticated or unencrypted requests fail.
- Clients can read counters but cannot write them as configuration updates.
- Only intended resource fields change and API response confirms success.
Explanation
Correct Answer
D:For RESTCONF PATCH partial update, successful verification means that only intended resource fields change and API response confirms success. That evidence directly tests whether the provider can modify a particular YANG-modeled setting without replacing the entire resource after deployment.
Incorrect Answers
A:The observation would verify NETCONF candidate validation under the separate requirement to check a staged routing configuration before affecting the active running datastore. It does not demonstrate the needed RESTCONF PATCH partial update result: only intended resource fields change and API response confirms success.
B:The observation would verify SNMPv3 authPriv requirements under the separate requirement to poll secure provider management counters with authentication and confidentiality. It does not demonstrate the needed RESTCONF PATCH partial update result: only intended resource fields change and API response confirms success.
C:The observation would verify YANG operational versus config state under the separate requirement to separate a read-only interface counter from an editable interface configuration leaf. It does not demonstrate the needed RESTCONF PATCH partial update result: only intended resource fields change and API response confirms success.
Question 989
While troubleshooting RESTCONF PATCH partial update at Coastal Communications, the intended acceptance outcome is still missing: only intended resource fields change and API response confirms success. Which fault condition should be investigated first for this particular design?
- An unrestricted DELETE is used when a one-field update is needed.
- The automation assumes every NETCONF target implements a separate candidate datastore.
- An SNMPv2c community string is treated as equivalent to v3 authPriv security.
- The script attempts to edit a read-only operational counter.
Explanation
Correct Answer
A:The suspected defect directly frustrates RESTCONF PATCH partial update: an unrestricted DELETE is used when a one-field update is needed. Correcting it should allow verification that only intended resource fields change and API response confirms success.
Incorrect Answers
B:This defect belongs to NETCONF candidate validation, where the affected outcome is to check a staged routing configuration before affecting the active running datastore. It is not the direct failure mode identified for the RESTCONF PATCH partial update design in this case: an unrestricted DELETE is used when a one-field update is needed.
C:This defect belongs to SNMPv3 authPriv requirements, where the affected outcome is to poll secure provider management counters with authentication and confidentiality. It is not the direct failure mode identified for the RESTCONF PATCH partial update design in this case: an unrestricted DELETE is used when a one-field update is needed.
D:This defect belongs to YANG operational versus config state, where the affected outcome is to separate a read-only interface counter from an editable interface configuration leaf. It is not the direct failure mode identified for the RESTCONF PATCH partial update design in this case: an unrestricted DELETE is used when a one-field update is needed.
Question 990
After Bluebird Infrastructure deploys RESTCONF PATCH partial update to modify a particular YANG-modeled setting without replacing the entire resource, the primary acceptance check passes (only intended resource fields change and API response confirms success). What remaining operational risk should still be part of the design review?
- NETCONF datastore capabilities are learned from server hello exchange.
- RESTCONF PATCH support and media types vary by platform release.
- Cipher and hash options depend on IOS XR release and platform support.
- Stale telemetry can differ from the last intended configuration snapshot.
Explanation
Correct Answer
B:The relevant boundary of RESTCONF PATCH partial update is that RESTCONF PATCH support and media types vary by platform release. Passing the acceptance test does not eliminate this residual operational risk.
Incorrect Answers
A:This concern applies to NETCONF candidate validation in a different scenario where operators need to check a staged routing configuration before affecting the active running datastore. For the deployed RESTCONF PATCH partial update approach, the relevant caution is instead that RESTCONF PATCH support and media types vary by platform release.
C:This concern applies to SNMPv3 authPriv requirements in a different scenario where operators need to poll secure provider management counters with authentication and confidentiality. For the deployed RESTCONF PATCH partial update approach, the relevant caution is instead that RESTCONF PATCH support and media types vary by platform release.
D:This concern applies to YANG operational versus config state in a different scenario where operators need to separate a read-only interface counter from an editable interface configuration leaf. For the deployed RESTCONF PATCH partial update approach, the relevant caution is instead that RESTCONF PATCH support and media types vary by platform release.
Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) (350-501) Practice Tests