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Question 630
A school Wi-Fi SSID uses WPA2-Personal and a shared key has leaked to former students. Which check most directly demonstrates the desired network behavior?
- Compare accepted legitimate ARP and rejected spoofed frames in violation logs
- Probe management ports from approved NOC and guest sources
- Inject a controlled rogue offer and verify it is rejected while legitimate leases succeed
- Test that old credentials fail and authorized devices receive the correct role
Explanation
Correct Answer
D:Revocation must be effective on the live WLAN. A shared leaked PSK grants anyone possessing it potential access.
Incorrect Answers
A:The control should distinguish authentic bindings from forged claims. It would not resolve the documented symptom; revocation must be effective on the live WLAN.
B:Access lists must allow operators while denying guests. By contrast, revocation must be effective on the live WLAN.
C:Functionality and protection must both pass. In this situation, revocation must be effective on the live WLAN.
Question 631
A school Wi-Fi SSID uses WPA2-Personal and a shared key has leaked to former students. Which assumption would be most misleading when investigating this situation?
- Place all departments into one open VLAN because they share a printer service
- Change the SSID's broadcast name but keep the exposed shared key
- Treat every RADIUS timeout as permission to join the trusted clinical VLAN
- Assume membership in any directory group automatically gives the intended contractor restrictions
Explanation
Correct Answer
B:Renaming a network does not invalidate a compromised secret. A shared leaked PSK grants anyone possessing it potential access.
Incorrect Answers
A:Shared resources do not require unrestricted lateral access. The relevant technical distinction is that renaming a network does not invalidate a compromised secret.
C:Availability fallback cannot override patient-data protection. It would not resolve the documented symptom; renaming a network does not invalidate a compromised secret.
D:Group-to-role mappings must be configured and tested. By contrast, renaming a network does not invalidate a compromised secret.
Question 632
A school Wi-Fi SSID uses WPA2-Personal and a shared key has leaked to former students. Which safeguard best reduces the deployment risk in this case?
- Keep the authorized DHCP relay/server paths documented and monitored
- Review role permissions with the information security owner before broad rollout
- Stage profile deployment and keep an authorized recovery enrollment path
- Document key rotation, supported client transition and immediate incident response
Explanation
Correct Answer
D:A hurried change must not leave critical devices offline. Revocation must be effective on the live WLAN.
Incorrect Answers
A:Incorrect trust mapping can cause a general addressing outage. The relevant technical distinction is that a hurried change must not leave critical devices offline.
B:A broad authenticated role can still expose sensitive systems. Here, however, a hurried change must not leave critical devices offline.
C:Certificate migrations can lock out large fleets. By contrast, a hurried change must not leave critical devices offline.
Question 633
A hospital's wireless network uses RADIUS but client devices unexpectedly enter a broad default role when the server times out. Which TWO actions together implement the required change and verify that it works? Choose TWO.
- Plan static-IP exceptions so critical equipment is not blocked
- Induce a controlled RADIUS timeout and inspect the assigned network role
- Transition the intended access to managed individual authentication or rotate compromised credentials
- Verify certificate revocation checking and the approved RADIUS trust policy
- Review authentication server fallback behavior and fail-closed or restricted-role settings
Explanation
Correct Answers
B:Failure-mode testing reveals the real default authorization. Authentication failure must not silently grant privileged access.
E:Authentication failure must not silently grant privileged access. Failure-mode testing reveals the real default authorization.
Incorrect Answers
A:Binding-driven inspection must support authorized non-DHCP devices. Here, however, resilience should preserve least privilege during identity outages.
C:A shared leaked PSK grants anyone possessing it potential access. In this situation, authentication failure must not silently grant privileged access.
D:A previously issued but revoked credential should not grant indefinite access. The relevant technical distinction is that authentication failure must not silently grant privileged access.
Question 634
A hospital's wireless network uses RADIUS but client devices unexpectedly enter a broad default role when the server times out. Which observation would best verify that the intended behavior is working?
- Test allowed support access and denied access from guest networks
- Verify deprecated insecure services are disabled and administrative sessions use secure protocols
- Induce a controlled RADIUS timeout and inspect the assigned network role
- Observe control-plane load and violation counters during a bounded test
Explanation
Correct Answer
C:Failure-mode testing reveals the real default authorization. Authentication failure must not silently grant privileged access.
Incorrect Answers
A:Both paths verify the boundary is enforced. It would not resolve the documented symptom; failure-mode testing reveals the real default authorization.
B:A documented policy is not proof the old listener is closed. Here, however, failure-mode testing reveals the real default authorization.
D:Measured protection must retain required network control traffic. In this situation, failure-mode testing reveals the real default authorization.
Question 635
A hospital's wireless network uses RADIUS but client devices unexpectedly enter a broad default role when the server times out. Which belief about the configuration should the team reject?
- Rely on a nonstandard HTTPS port as the primary management protection
- Change the SSID's broadcast name but keep the exposed shared key
- Treat every RADIUS timeout as permission to join the trusted clinical VLAN
- Assume a certificate's future expiry date means revocation is irrelevant
Explanation
Correct Answer
C:Availability fallback cannot override patient-data protection. Authentication failure must not silently grant privileged access.
Incorrect Answers
A:Port changes do not authenticate or isolate access. It would not resolve the documented symptom; availability fallback cannot override patient-data protection.
B:Renaming a network does not invalidate a compromised secret. In this situation, availability fallback cannot override patient-data protection.
D:Revocation can invalidate credentials before expiration. By contrast, availability fallback cannot override patient-data protection.
Question 636
A hospital's wireless network uses RADIUS but client devices unexpectedly enter a broad default role when the server times out. What should be included in the rollout plan to limit a foreseeable failure?
- Record credential rotation and change audit requirements
- Maintain redundant authentication infrastructure and a limited emergency-access policy
- Include a false-positive appeal and restore procedure
- Define phone-and-PC multi-auth exceptions explicitly
Explanation
Correct Answer
B:Resilience should preserve least privilege during identity outages. Failure-mode testing reveals the real default authorization.
Incorrect Answers
A:Secure APIs require lifecycle controls beyond initial connectivity. It would not resolve the documented symptom; resilience should preserve least privilege during identity outages.
C:Quarantine actions must be reversible after investigation. By contrast, resilience should preserve least privilege during identity outages.
D:Legitimate shared-port designs should not become open forwarding paths. The relevant technical distinction is that resilience should preserve least privilege during identity outages.
Question 637
A campus wireless policy permits only inventory handhelds but unknown laptops associate using cloned MAC addresses. What should the network engineer do to address this requirement?
- Create an expiring contractor identity/role with only the needed segment access
- Restrict API access to approved management sources and strong authentication
- Review authentication server fallback behavior and fail-closed or restricted-role settings
- Evaluate stronger device identity such as certificate-based authentication and role mapping
Explanation
Correct Answer
D:MAC address alone is not proof of device ownership. Credential checks identify devices beyond easily copied MACs.
Incorrect Answers
A:Time-bounded least privilege limits the exposure of external support. The relevant technical distinction is that mAC address alone is not proof of device ownership.
B:Device management interfaces are privileged targets. Here, however, mAC address alone is not proof of device ownership.
C:Authentication failure must not silently grant privileged access. By contrast, mAC address alone is not proof of device ownership.
Question 638
A campus wireless policy permits only inventory handhelds but unknown laptops associate using cloned MAC addresses. What should the team inspect to confirm the result?
- Check contract expiry, assigned role and denied internal destinations
- Verify deprecated insecure services are disabled and administrative sessions use secure protocols
- Compare certificate identity and authorization outcome on a genuine and spoofed test client
- Probe management ports from approved NOC and guest sources
Explanation
Correct Answer
C:Credential checks identify devices beyond easily copied MACs. MAC address alone is not proof of device ownership.
Incorrect Answers
A:Authorization should disappear when the contract ends. Here, however, credential checks identify devices beyond easily copied MACs.
B:A documented policy is not proof the old listener is closed. The relevant technical distinction is that credential checks identify devices beyond easily copied MACs.
D:Access lists must allow operators while denying guests. In this situation, credential checks identify devices beyond easily copied MACs.
Question 639
A campus wireless policy permits only inventory handhelds but unknown laptops associate using cloned MAC addresses. Which misconception is most likely to obstruct a correct fix?
- Assume any radio using the corporate SSID is part of the approved WLAN
- Disable all security logs to reduce switch CPU while leaving attack traffic unrestricted
- Trust all edge ports so no DHCP offers are ever blocked
- Use MAC filtering as the sole defense against a capable attacker
Explanation
Correct Answer
D:MAC addresses can be observed and impersonated. MAC address alone is not proof of device ownership.
Incorrect Answers
A:SSID names are public and trivial to impersonate. It would not resolve the documented symptom; mAC addresses can be observed and impersonated.
B:Less monitoring does not stop packet floods. Here, however, mAC addresses can be observed and impersonated.
C:That configuration lets a rogue server assign unsafe gateways. In this situation, mAC addresses can be observed and impersonated.
Question 640
A campus wireless policy permits only inventory handhelds but unknown laptops associate using cloned MAC addresses. What precaution is most important before the change is expanded?
- Enable strong administrator authentication and log management changes
- Document key rotation, supported client transition and immediate incident response
- Maintain approved certificate lifecycle and revocation procedures
- Include a false-positive appeal and restore procedure
Explanation
Correct Answer
C:Hardware replacement and loss should trigger credential control. Credential checks identify devices beyond easily copied MACs.
Incorrect Answers
A:Segmentation should be paired with identity and auditing. It would not resolve the documented symptom; hardware replacement and loss should trigger credential control.
B:A hurried change must not leave critical devices offline. In this situation, hardware replacement and loss should trigger credential control.
D:Quarantine actions must be reversible after investigation. By contrast, hardware replacement and loss should trigger credential control.
HPE Network Campus Access Professional (HPE7-A01) Practice Tests
