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Question 720
An enterprise uses MAC authentication for classroom projectors and wants to detect unregistered replacements. Which misconception is most likely to obstruct a correct fix?
- Treat every AAA timeout as explicit authorization to the most trusted subnet
- Accept any MAC address from a projector vendor's OUI into the trusted role
- Assume identical username text always produces an identical role without policy configuration
- Increase AP transmission power to repair a wrongly authorized user role
Explanation
Correct Answer
B:Vendor prefixes do not guarantee that a device is owned or approved. MAC-based access relies on accurately maintained device identity records.
Incorrect Answers
A:Authentication failure is not a proof of user identity. In this situation, vendor prefixes do not guarantee that a device is owned or approved.
C:Service type and NAS attributes can affect authorization rules. It would not resolve the documented symptom; vendor prefixes do not guarantee that a device is owned or approved.
D:RF strength does not control directory policy selection. By contrast, vendor prefixes do not guarantee that a device is owned or approved.
Question 721
An enterprise uses MAC authentication for classroom projectors and wants to detect unregistered replacements. What precaution is most important before the change is expanded?
- Retain secure break-glass access and monitor central AAA failures
- Stage group rule changes with explicit denied-access regression cases
- Test local VLAN existence and authorization attributes before enabling the contractor cohort
- Set ownership, replacement and decommission processes for the registry
Explanation
Correct Answer
D:Inventory drift can weaken a MAC-based control. The comparison confirms the inventory boundary actually controls access.
Incorrect Answers
A:An identity outage must not eliminate authorized emergency maintenance. The relevant technical distinction is that inventory drift can weaken a MAC-based control.
B:A broad group rule can affect every student simultaneously. By contrast, inventory drift can weaken a MAC-based control.
C:An undefined VLAN can cause unpredictable access failures. It would not resolve the documented symptom; inventory drift can weaken a MAC-based control.
Question 722
A switch supports downloadable ACLs through RADIUS but a user's role changes mid-session without enforcement updating. Which configuration decision most directly resolves the situation?
- Use a supported multi-domain or multi-auth design with separate phone and data roles
- Use MAC authentication bypass with a restricted printer role where supported
- Use a supported reauthentication or change-of-authorization process with policy validation
- Align the configured shared secret and server identity on both RADIUS client and server
Explanation
Correct Answer
C:Authorization changes may require an explicit session update to take effect. Seeing a new directory group is not proof the access switch updated its running session.
Incorrect Answers
A:Shared ports may carry devices with different identity and VLAN requirements. Here, however, authorization changes may require an explicit session update to take effect.
B:Non-802.1X devices still require an accountable limited access decision. By contrast, authorization changes may require an explicit session update to take effect.
D:Mismatched authentication parameters can cause request rejection or silence. The relevant technical distinction is that authorization changes may require an explicit session update to take effect.
Question 723
A switch supports downloadable ACLs through RADIUS but a user's role changes mid-session without enforcement updating. Which check most directly demonstrates the desired network behavior?
- Inspect a controlled CoA/reauth event and the effective ACL before and after
- Check policy rule hits and the resulting enforced role for student and teacher test accounts
- Probe DNS and an employee-record destination from a test guest identity
- Attempt a safe revocation test and inspect rejection logs
Explanation
Correct Answer
A:Seeing a new directory group is not proof the access switch updated its running session. Authorization changes may require an explicit session update to take effect.
Incorrect Answers
B:Comparing both categories identifies an overbroad match. Here, however, seeing a new directory group is not proof the access switch updated its running session.
C:Both an allowed and denied test are needed to prove policy. The relevant technical distinction is that seeing a new directory group is not proof the access switch updated its running session.
D:A published revocation record alone does not prove the access service reads it. In this situation, seeing a new directory group is not proof the access switch updated its running session.
Question 724
A switch supports downloadable ACLs through RADIUS but a user's role changes mid-session without enforcement updating. Which assumption would be most misleading when investigating this situation?
- Assume any directory group edit instantly rewrites every active switch ACL
- Accept any MAC address from a projector vendor's OUI into the trusted role
- Authenticate only the phone and assume the workstation inherits its trusted voice policy
- Turn off TLS server-name and certificate verification on every endpoint
Explanation
Correct Answer
A:Existing sessions may retain the earlier authorization state. Authorization changes may require an explicit session update to take effect.
Incorrect Answers
B:Vendor prefixes do not guarantee that a device is owned or approved. In this situation, existing sessions may retain the earlier authorization state.
C:A second endpoint should not gain voice trust without policy. Here, however, existing sessions may retain the earlier authorization state.
D:Removing trust checks exposes users to fraudulent authentication servers. It would not resolve the documented symptom; existing sessions may retain the earlier authorization state.
Question 725
A switch supports downloadable ACLs through RADIUS but a user's role changes mid-session without enforcement updating. Which safeguard best reduces the deployment risk in this case?
- Test phone reboot and workstation reconnect independently
- Document device loss response, certificate rotation and offline validation limits
- Monitor CoA errors and keep an authorized recovery workflow
- Maintain a device inventory and require a sponsor for each MAB exception
Explanation
Correct Answer
C:Failed changes should not leave privilege beyond its intended period. Seeing a new directory group is not proof the access switch updated its running session.
Incorrect Answers
A:Session changes can expose unintended role fallback. It would not resolve the documented symptom; failed changes should not leave privilege beyond its intended period.
B:Revocation must be operationally enforceable. In this situation, failed changes should not leave privilege beyond its intended period.
D:MAC identities can be spoofed and must be governed. By contrast, failed changes should not leave privilege beyond its intended period.
Question 726
An office wants to authenticate users on an access switch while keeping unauthenticated devices in a limited onboarding role. What is the most appropriate first technical change?
- Revoke the lost device certificate and ensure the authentication policy checks revocation
- Configure supported pre-authentication or guest/quarantine policy with a narrow onboarding service list
- Align the configured shared secret and server identity on both RADIUS client and server
- Check the RADIUS policy match and returned attributes along with the switch's enforcement state
Explanation
Correct Answer
B:Devices can receive limited services before full identity validation without broad network access. The fallback role must allow only the required enrollment workflow.
Incorrect Answers
A:Credential removal must take effect before expiry for lost devices. By contrast, devices can receive limited services before full identity validation without broad network access.
C:Mismatched authentication parameters can cause request rejection or silence. The relevant technical distinction is that devices can receive limited services before full identity validation without broad network access.
D:Credential acceptance can be followed by an incorrect authorization decision. It would not resolve the documented symptom; devices can receive limited services before full identity validation without broad network access.
Question 727
An office wants to authenticate users on an access switch while keeping unauthenticated devices in a limited onboarding role. Which observation would best verify that the intended behavior is working?
- Test onboarding reachability and denied production destinations for an unauthenticated client
- Attempt a safe revocation test and inspect rejection logs
- Connect an enrolled and an unknown projector and inspect the resulting port session roles
- Check supplicant and RADIUS handshake errors against the full new chain
Explanation
Correct Answer
A:The fallback role must allow only the required enrollment workflow. Devices can receive limited services before full identity validation without broad network access.
Incorrect Answers
B:A published revocation record alone does not prove the access service reads it. Here, however, the fallback role must allow only the required enrollment workflow.
C:The comparison confirms the inventory boundary actually controls access. The relevant technical distinction is that the fallback role must allow only the required enrollment workflow.
D:Evidence pinpoints whether client or server trust is missing. By contrast, the fallback role must allow only the required enrollment workflow.
Question 728
An office wants to authenticate users on an access switch while keeping unauthenticated devices in a limited onboarding role. Which belief about the configuration should the team reject?
- Disable 802.1X globally instead of correcting the RADIUS trust relationship
- Change the employee's directory password and assume the device certificate is invalidated
- Place unauthenticated clients directly in the full employee VLAN to simplify setup
- Disable 802.1X on the entire closet to make one printer work
Explanation
Correct Answer
C:An onboarding exception must not confer employee authorization. Devices can receive limited services before full identity validation without broad network access.
Incorrect Answers
A:Broad bypass trades an administrative error for widespread exposure. In this situation, an onboarding exception must not confer employee authorization.
B:User passwords and device certificates have separate lifecycles. Here, however, an onboarding exception must not confer employee authorization.
D:Global deactivation weakens access control for unrelated workstations. The relevant technical distinction is that an onboarding exception must not confer employee authorization.
Question 729
An office wants to authenticate users on an access switch while keeping unauthenticated devices in a limited onboarding role. What should be included in the rollout plan to limit a foreseeable failure?
- Pilot the certificate migration on both new and existing laptops
- Document device loss response, certificate rotation and offline validation limits
- Provide redundant RADIUS endpoints with monitored response health
- Audit the enrollment transition and clear temporary roles after successful authentication
Explanation
Correct Answer
D:Temporary access should not persist once the device state changes. The fallback role must allow only the required enrollment workflow.
Incorrect Answers
A:Old clients may have different cached trust configuration. In this situation, temporary access should not persist once the device state changes.
B:Revocation must be operationally enforceable. Here, however, temporary access should not persist once the device state changes.
C:Availability improvements should not undermine access restrictions. It would not resolve the documented symptom; temporary access should not persist once the device state changes.
Question 730
A campus operator needs to diagnose intermittent packet loss without disrupting an active user port. What should the network engineer do to address this requirement?
- Configure supported port mirroring to an authorized packet-capture destination
- Use the supported authenticated REST API with read-only scope for inventory collection
- Use supported configuration audit/events and NAE checkpoints where appropriate
- Verify API credentials, user role, endpoint permissions and supported version
Explanation
Correct Answer
A:Mirroring provides traffic evidence while the production link remains active. An empty capture can indicate incorrect mirroring rather than no traffic.
Incorrect Answers
B:Structured state retrieval can reduce manual transcription errors. It would not resolve the documented symptom; mirroring provides traffic evidence while the production link remains active.
C:Configuration history can link a new symptom to a recent change. In this situation, mirroring provides traffic evidence while the production link remains active.
D:REST access depends on authentication and authorization independent of network ping. By contrast, mirroring provides traffic evidence while the production link remains active.
HPE Network Campus Access Professional (HPE7-A01) Practice Tests