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Question 610
A floor switch sees unexpected MAC addresses on an authenticated staff port. Which observation would best verify that the intended behavior is working?
- Review EAP failure events and the presented client/server certificates
- Compare accepted legitimate ARP and rejected spoofed frames in violation logs
- Check contract expiry, assigned role and denied internal destinations
- Inspect port authentication sessions and learned MACs after adding a test bridge
Explanation
Correct Answer
D:Session evidence reveals unauthorized additional devices. One authenticated user should not automatically grant unrestricted service to all downstream hosts.
Incorrect Answers
A:Chain or EKU errors can be distinguished from transport faults. By contrast, session evidence reveals unauthorized additional devices.
B:The control should distinguish authentic bindings from forged claims. In this situation, session evidence reveals unauthorized additional devices.
C:Authorization should disappear when the contract ends. It would not resolve the documented symptom; session evidence reveals unauthorized additional devices.
Question 611
A floor switch sees unexpected MAC addresses on an authenticated staff port. Which belief about the configuration should the team reject?
- Assume a single successful 802.1X exchange validates any downstream MAC learned later
- Place all departments into one open VLAN because they share a printer service
- 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
A:A shared physical port may carry multiple hosts. One authenticated user should not automatically grant unrestricted service to all downstream hosts.
Incorrect Answers
B:Shared resources do not require unrestricted lateral access. It would not resolve the documented symptom; a shared physical port may carry multiple hosts.
C:That configuration lets a rogue server assign unsafe gateways. By contrast, a shared physical port may carry multiple hosts.
D:MAC addresses can be observed and impersonated. The relevant technical distinction is that a shared physical port may carry multiple hosts.
Question 612
A floor switch sees unexpected MAC addresses on an authenticated staff port. What should be included in the rollout plan to limit a foreseeable failure?
- Review role permissions with the information security owner before broad rollout
- Document key rotation, supported client transition and immediate incident response
- Require explicit deny checks whenever guest roles or VLAN mappings change
- Define phone-and-PC multi-auth exceptions explicitly
Explanation
Correct Answer
D:Legitimate shared-port designs should not become open forwarding paths. Session evidence reveals unauthorized additional devices.
Incorrect Answers
A:A broad authenticated role can still expose sensitive systems. Here, however, legitimate shared-port designs should not become open forwarding paths.
B:A hurried change must not leave critical devices offline. The relevant technical distinction is that legitimate shared-port designs should not become open forwarding paths.
C:A template error can expose protected systems at scale. By contrast, legitimate shared-port designs should not become open forwarding paths.
Question 613
A corporate WLAN security team needs to support EAP-TLS without accepting a fraudulent RADIUS server. What should the network engineer do to address this requirement?
- Use a narrow quarantine role or security policy for the affected authenticated device
- Require supplicant validation of the authentic server certificate and trust anchors
- Review authentication server fallback behavior and fail-closed or restricted-role settings
- Apply segmentation or role-based enforcement appropriate to the student trust level
Explanation
Correct Answer
B:Client-side trust validation reduces credential capture by imitation servers. Rejection of an impostor demonstrates effective trust checking.
Incorrect Answers
A:Targeted containment avoids unnecessarily denying healthy users. The relevant technical distinction is that client-side trust validation reduces credential capture by imitation servers.
C:Authentication failure must not silently grant privileged access. In this situation, client-side trust validation reduces credential capture by imitation servers.
D:Edge access control should restrict more than initial login. Here, however, client-side trust validation reduces credential capture by imitation servers.
Question 614
A corporate WLAN security team needs to support EAP-TLS without accepting a fraudulent RADIUS server. What should the team inspect to confirm the result?
- Inspect a test connection with valid and forged server certificates
- Compare accepted legitimate ARP and rejected spoofed frames in violation logs
- Verify deprecated insecure services are disabled and administrative sessions use secure protocols
- Probe management ports from approved NOC and guest sources
Explanation
Correct Answer
A:Rejection of an impostor demonstrates effective trust checking. Client-side trust validation reduces credential capture by imitation servers.
Incorrect Answers
B:The control should distinguish authentic bindings from forged claims. In this situation, rejection of an impostor demonstrates effective trust checking.
C:A documented policy is not proof the old listener is closed. Here, however, rejection of an impostor demonstrates effective trust checking.
D:Access lists must allow operators while denying guests. It would not resolve the documented symptom; rejection of an impostor demonstrates effective trust checking.
Question 615
A corporate WLAN security team needs to support EAP-TLS without accepting a fraudulent RADIUS server. Which misconception is most likely to obstruct a correct fix?
- Turn off server-certificate checks to eliminate authentication prompts
- Trust all edge ports so no DHCP offers are ever blocked
- Disable all security logs to reduce switch CPU while leaving attack traffic unrestricted
- Share a permanent administrator credential to avoid provisioning an individual contractor identity
Explanation
Correct Answer
A:The client could then trust a malicious authenticator. Client-side trust validation reduces credential capture by imitation servers.
Incorrect Answers
B:That configuration lets a rogue server assign unsafe gateways. It would not resolve the documented symptom; the client could then trust a malicious authenticator.
C:Less monitoring does not stop packet floods. In this situation, the client could then trust a malicious authenticator.
D:Shared privileged access defeats accountability and revocation. By contrast, the client could then trust a malicious authenticator.
Question 616
A corporate WLAN security team needs to support EAP-TLS without accepting a fraudulent RADIUS server. What precaution is most important before the change is expanded?
- Apply temporary role expiry and require a contractor sponsor
- Distribute the approved CA profile through device management
- Require explicit deny checks whenever guest roles or VLAN mappings change
- Document key rotation, supported client transition and immediate incident response
Explanation
Correct Answer
B:A consistent trusted root reduces unsafe manual user prompts. Rejection of an impostor demonstrates effective trust checking.
Incorrect Answers
A:External access must be revoked when the assignment ends. The relevant technical distinction is that a consistent trusted root reduces unsafe manual user prompts.
C:A template error can expose protected systems at scale. It would not resolve the documented symptom; a consistent trusted root reduces unsafe manual user prompts.
D:A hurried change must not leave critical devices offline. By contrast, a consistent trusted root reduces unsafe manual user prompts.
Question 617
A campus switch receives DHCP responses from a user-controlled device posing as the network DHCP server. Which configuration decision most directly resolves the situation?
- Move administration to a restricted management segment and enforce access control
- Enable trusted-port DHCP snooping and monitor unauthorized offers
- Use supported port rate limits, storm control or appropriate control-plane safeguards
- Deploy supported dynamic ARP inspection with a valid binding source
Explanation
Correct Answer
B:The access edge should block unapproved address services. Functionality and protection must both pass.
Incorrect Answers
A:Management protocols should not be exposed to untrusted clients. By contrast, the access edge should block unapproved address services.
C:Rate-based protection can prevent one endpoint from exhausting shared resources. Here, however, the access edge should block unapproved address services.
D:Forged ARP frames can redirect local traffic without changing IP routes. The relevant technical distinction is that the access edge should block unapproved address services.
Question 618
A campus switch receives DHCP responses from a user-controlled device posing as the network DHCP server. Which check most directly demonstrates the desired network behavior?
- Test that old credentials fail and authorized devices receive the correct role
- Inject a controlled rogue offer and verify it is rejected while legitimate leases succeed
- Test denied payroll access and permitted guest internet sessions after authentication
- Check contract expiry, assigned role and denied internal destinations
Explanation
Correct Answer
B:Functionality and protection must both pass. The access edge should block unapproved address services.
Incorrect Answers
A:Revocation must be effective on the live WLAN. In this situation, functionality and protection must both pass.
C:Negative and positive flow checks verify actual role enforcement. The relevant technical distinction is that functionality and protection must both pass.
D:Authorization should disappear when the contract ends. Here, however, functionality and protection must both pass.
Question 619
A campus switch receives DHCP responses from a user-controlled device posing as the network DHCP server. Which assumption would be most misleading when investigating this situation?
- Assume a single successful 802.1X exchange validates any downstream MAC learned later
- Use MAC filtering as the sole defense against a capable attacker
- Trust all edge ports so no DHCP offers are ever blocked
- Turn off server-certificate checks to eliminate authentication prompts
Explanation
Correct Answer
C:That configuration lets a rogue server assign unsafe gateways. The access edge should block unapproved address services.
Incorrect Answers
A:A shared physical port may carry multiple hosts. In this situation, that configuration lets a rogue server assign unsafe gateways.
B:MAC addresses can be observed and impersonated. Here, however, that configuration lets a rogue server assign unsafe gateways.
D:The client could then trust a malicious authenticator. It would not resolve the documented symptom; that configuration lets a rogue server assign unsafe gateways.
Question 620
A campus switch receives DHCP responses from a user-controlled device posing as the network DHCP server. Which safeguard best reduces the deployment risk in this case?
- Keep the authorized DHCP relay/server paths documented and monitored
- Require explicit deny checks whenever guest roles or VLAN mappings change
- Document key rotation, supported client transition and immediate incident response
- Maintain an approved AP inventory and a safe containment procedure
Explanation
Correct Answer
A:Incorrect trust mapping can cause a general addressing outage. Functionality and protection must both pass.
Incorrect Answers
B:A template error can expose protected systems at scale. In this situation, incorrect trust mapping can cause a general addressing outage.
C:A hurried change must not leave critical devices offline. It would not resolve the documented symptom; incorrect trust mapping can cause a general addressing outage.
D:Incorrect rogue classification can disrupt legitimate neighboring networks. By contrast, incorrect trust mapping can cause a general addressing outage.
HPE Network Campus Access Professional (HPE7-A01) Practice Tests