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Question 440
A campus migration has no explicit rollback for a failed fabric cutover. Which workstream is missing?
- Role-based dynamic segmentation
- Change-impact and staged migration plan
- Validation of effective device state
- Central site and group organization
Explanation
Correct Answer
B:Change impact, coexistence and recovery must be documented. Fabric or role migrations should define coexistence, rollback and a phased change strategy.
Incorrect Answers
A:Identity-based permissions can follow users and compatible devices across access attachments. But this does not address the case requirement to restore prior working segmentation if needed.
C:Central intent must be compared to actual switch status, interfaces and policies. But this does not address the case requirement to restore prior working segmentation if needed.
D:Central organizes devices and common configurations by group and site. But this does not address the case requirement to restore prior working segmentation if needed.
Question 441
A new site shows green policy status in Central but clients receive unexpected ACL denies. What must be investigated?
- Validation of effective device state
- Role-based dynamic segmentation
- Change-impact and staged migration plan
- Compatibility and licensing matrix
Explanation
Correct Answer
A:Operational data must confirm Central-intended policy on real traffic. Central intent must be compared to actual switch status, interfaces and policies.
Incorrect Answers
B:Identity-based permissions can follow users and compatible devices across access attachments. But this does not address the case requirement to detect intent-to-enforcement mismatch.
C:Fabric or role migrations should define coexistence, rollback and a phased change strategy. But this does not address the case requirement to detect intent-to-enforcement mismatch.
D:Product, software and entitlement support determine available orchestration features. But this does not address the case requirement to detect intent-to-enforcement mismatch.
Question 442
A monitoring system should query interface state in structured JSON without changing configuration. What API mode is required?
- REST write capability with RBAC
- AOS-CX REST read access
- Idempotent desired-state automation
- API transaction audit trail
Explanation
Correct Answer
B:Read-oriented REST calls can retrieve state without mutation. REST GET requests expose structured device state for authorized inspection.
Incorrect Answers
A:Mutating API calls require suitable authorization and enabled write access per platform settings. But this does not address the case requirement to programmatically observe AOS-CX switch status.
C:Automation should compare desired and actual state and avoid repeated unintended mutations. But this does not address the case requirement to programmatically observe AOS-CX switch status.
D:Log API caller, time, target and changed objects for reliable review and rollback. But this does not address the case requirement to programmatically observe AOS-CX switch status.
Question 443
A script attempts an approved VLAN update but receives a write-permission error. What control must be checked?
- Idempotent desired-state automation
- REST write capability with RBAC
- Configuration preflight validation
- Rate limiting and error handling
Explanation
Correct Answer
B:REST write access and admin authorization govern mutations. Mutating API calls require suitable authorization and enabled write access per platform settings.
Incorrect Answers
A:Automation should compare desired and actual state and avoid repeated unintended mutations. But this does not address the case requirement to allow authorized API configuration updates.
C:Check target model, firmware, dependencies and planned effect before sending changes. But this does not address the case requirement to allow authorized API configuration updates.
D:Automation should respect device/API capacity, detect failures and retry safely. But this does not address the case requirement to allow authorized API configuration updates.
Question 444
A compliance job runs repeatedly and should not duplicate an ACL entry on every run. What design property matters?
- AOS-CX REST read access
- REST write capability with RBAC
- Configuration preflight validation
- Idempotent desired-state automation
Explanation
Correct Answer
D:Idempotence keeps repeated automation operations stable. Automation should compare desired and actual state and avoid repeated unintended mutations.
Incorrect Answers
A:REST GET requests expose structured device state for authorized inspection. But this does not address the case requirement to avoid cumulative changes on retries.
B:Mutating API calls require suitable authorization and enabled write access per platform settings. But this does not address the case requirement to avoid cumulative changes on retries.
C:Check target model, firmware, dependencies and planned effect before sending changes. But this does not address the case requirement to avoid cumulative changes on retries.
Question 445
An automation controller plans to apply the same configuration to different CX releases. What check should precede mutation?
- Rate limiting and error handling
- Idempotent desired-state automation
- Configuration preflight validation
- REST write capability with RBAC
Explanation
Correct Answer
C:Capability compatibility must be verified for every target. Check target model, firmware, dependencies and planned effect before sending changes.
Incorrect Answers
A:Automation should respect device/API capacity, detect failures and retry safely. But this does not address the case requirement to avoid unsupported REST changes on a switch version.
B:Automation should compare desired and actual state and avoid repeated unintended mutations. But this does not address the case requirement to avoid unsupported REST changes on a switch version.
D:Mutating API calls require suitable authorization and enabled write access per platform settings. But this does not address the case requirement to avoid unsupported REST changes on a switch version.
Question 446
A failed automation run changed interface settings but no operator can identify which API account acted. What should be logged?
- Configuration preflight validation
- Rate limiting and error handling
- API transaction audit trail
- REST write capability with RBAC
Explanation
Correct Answer
C:Caller, object and timestamp evidence supports audit and recovery. Log API caller, time, target and changed objects for reliable review and rollback.
Incorrect Answers
A:Check target model, firmware, dependencies and planned effect before sending changes. But this does not address the case requirement to trace automated switch changes.
B:Automation should respect device/API capacity, detect failures and retry safely. But this does not address the case requirement to trace automated switch changes.
D:Mutating API calls require suitable authorization and enabled write access per platform settings. But this does not address the case requirement to trace automated switch changes.
Question 447
A script hammers hundreds of REST requests and silently skips failures. What resilience design is needed?
- API transaction audit trail
- Rate limiting and error handling
- Configuration preflight validation
- AOS-CX REST read access
Explanation
Correct Answer
B:Backoff and error checks prevent uncontrolled overload or partial state. Automation should respect device/API capacity, detect failures and retry safely.
Incorrect Answers
A:Log API caller, time, target and changed objects for reliable review and rollback. But this does not address the case requirement to handle API rate and server errors safely.
C:Check target model, firmware, dependencies and planned effect before sending changes. But this does not address the case requirement to handle API rate and server errors safely.
D:REST GET requests expose structured device state for authorized inspection. But this does not address the case requirement to handle API rate and server errors safely.
Question 448
A fleet dashboard collects structured VLAN state from a switch using GET. What interface is being used?
- Idempotent desired-state automation
- AOS-CX REST read access
- REST write capability with RBAC
- Rate limiting and error handling
Explanation
Correct Answer
B:REST exposes machine-readable switch resources. REST GET requests expose structured device state for authorized inspection.
Incorrect Answers
A:Automation should compare desired and actual state and avoid repeated unintended mutations. But this does not address the case requirement to retrieve live device configuration without screen scraping.
C:Mutating API calls require suitable authorization and enabled write access per platform settings. But this does not address the case requirement to retrieve live device configuration without screen scraping.
D:Automation should respect device/API capacity, detect failures and retry safely. But this does not address the case requirement to retrieve live device configuration without screen scraping.
Question 449
Running the same automation twice deletes and recreates all ports unnecessarily. Which principle is missing?
- Configuration preflight validation
- AOS-CX REST read access
- Idempotent desired-state automation
- API transaction audit trail
Explanation
Correct Answer
C:Desired-state idempotence avoids unwanted repeated operations. Automation should compare desired and actual state and avoid repeated unintended mutations.
Incorrect Answers
A:Check target model, firmware, dependencies and planned effect before sending changes. But this does not address the case requirement to make automation safe for recurring execution.
B:REST GET requests expose structured device state for authorized inspection. But this does not address the case requirement to make automation safe for recurring execution.
D:Log API caller, time, target and changed objects for reliable review and rollback. But this does not address the case requirement to make automation safe for recurring execution.
Question 450
An API-driven change caused an outage, and the investigation needs to identify its source. What evidence should be retained?
- AOS-CX REST read access
- Idempotent desired-state automation
- API transaction audit trail
- Configuration preflight validation
Explanation
Correct Answer
C:Audit records should include actor, target and time. Log API caller, time, target and changed objects for reliable review and rollback.
Incorrect Answers
A:REST GET requests expose structured device state for authorized inspection. But this does not address the case requirement to reconstruct the automated change history.
B:Automation should compare desired and actual state and avoid repeated unintended mutations. But this does not address the case requirement to reconstruct the automated change history.
D:Check target model, firmware, dependencies and planned effect before sending changes. But this does not address the case requirement to reconstruct the automated change history.
HPE Network Switching Professional (HPE7-A08) Practice Tests