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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.
Question 641
An employee network requires segmentation of finance data while allowing staff to reach shared printers. Which configuration decision most directly resolves the situation?
- Review MAC limits and post-authentication role enforcement for bridged devices
- Correct authorization mapping for contractor identity groups and attach least-privilege access
- Deploy supported dynamic ARP inspection with a valid binding source
- Configure narrowly permitted routed flows across roles or VLANs
Explanation
Correct Answer
D:Segmentation should permit necessary shared services while denying sensitive targets. Both positive and negative cases are needed to verify policy.
Incorrect Answers
A:One authenticated user should not automatically grant unrestricted service to all downstream hosts. The relevant technical distinction is that segmentation should permit necessary shared services while denying sensitive targets.
B:Different business responsibilities require different allowed services. It would not resolve the documented symptom; segmentation should permit necessary shared services while denying sensitive targets.
C:Forged ARP frames can redirect local traffic without changing IP routes. By contrast, segmentation should permit necessary shared services while denying sensitive targets.
Question 642
An employee network requires segmentation of finance data while allowing staff to reach shared printers. Which check most directly demonstrates the desired network behavior?
- Compare certificate identity and authorization outcome on a genuine and spoofed test client
- Probe management ports from approved NOC and guest sources
- Test printer access and rejected access to finance servers from ordinary staff roles
- Review EAP failure events and the presented client/server certificates
Explanation
Correct Answer
C:Both positive and negative cases are needed to verify policy. Segmentation should permit necessary shared services while denying sensitive targets.
Incorrect Answers
A:Credential checks identify devices beyond easily copied MACs. Here, however, both positive and negative cases are needed to verify policy.
B:Access lists must allow operators while denying guests. The relevant technical distinction is that both positive and negative cases are needed to verify policy.
D:Chain or EKU errors can be distinguished from transport faults. By contrast, both positive and negative cases are needed to verify policy.
Question 643
An employee network requires segmentation of finance data while allowing staff to reach shared printers. Which assumption would be most misleading when investigating this situation?
- Assume hiding the guest SSID is sufficient to isolate internal services
- Place all departments into one open VLAN because they share a printer service
- Rely on a nonstandard HTTPS port as the primary management protection
- Assume a single successful 802.1X exchange validates any downstream MAC learned later
Explanation
Correct Answer
B:Shared resources do not require unrestricted lateral access. Segmentation should permit necessary shared services while denying sensitive targets.
Incorrect Answers
A:SSID visibility has no authority over network routing or policy. The relevant technical distinction is that shared resources do not require unrestricted lateral access.
C:Port changes do not authenticate or isolate access. In this situation, shared resources do not require unrestricted lateral access.
D:A shared physical port may carry multiple hosts. Here, however, shared resources do not require unrestricted lateral access.
Question 644
An employee network requires segmentation of finance data while allowing staff to reach shared printers. Which safeguard best reduces the deployment risk in this case?
- Record credential rotation and change audit requirements
- Maintain an approved AP inventory and a safe containment procedure
- Stage profile deployment and keep an authorized recovery enrollment path
- Review shared-resource exceptions with owners and log changes
Explanation
Correct Answer
D:Overbroad exceptions can erode the original trust boundary. Both positive and negative cases are needed to verify policy.
Incorrect Answers
A:Secure APIs require lifecycle controls beyond initial connectivity. It would not resolve the documented symptom; overbroad exceptions can erode the original trust boundary.
B:Incorrect rogue classification can disrupt legitimate neighboring networks. In this situation, overbroad exceptions can erode the original trust boundary.
C:Certificate migrations can lock out large fleets. Here, however, overbroad exceptions can erode the original trust boundary.
Question 645
A switch's control plane faces excessive unknown traffic from one compromised edge port. What is the most appropriate first technical change?
- Replace insecure administration with supported SSH/HTTPS and approved authentication
- Use supported port rate limits, storm control or appropriate control-plane safeguards
- Enable trusted-port DHCP snooping and monitor unauthorized offers
- Move administration to a restricted management segment and enforce access control
Explanation
Correct Answer
B:Rate-based protection can prevent one endpoint from exhausting shared resources. Measured protection must retain required network control traffic.
Incorrect Answers
A:Encrypted management channels reduce credential interception. It would not resolve the documented symptom; rate-based protection can prevent one endpoint from exhausting shared resources.
C:The access edge should block unapproved address services. By contrast, rate-based protection can prevent one endpoint from exhausting shared resources.
D:Management protocols should not be exposed to untrusted clients. In this situation, rate-based protection can prevent one endpoint from exhausting shared resources.
Question 646
A switch's control plane faces excessive unknown traffic from one compromised edge port. Which observation would best verify that the intended behavior is working?
- Induce a controlled RADIUS timeout and inspect the assigned network role
- Check contract expiry, assigned role and denied internal destinations
- Observe control-plane load and violation counters during a bounded test
- Inspect RADIUS attributes, applied role and blocked employee-only sessions
Explanation
Correct Answer
C:Measured protection must retain required network control traffic. Rate-based protection can prevent one endpoint from exhausting shared resources.
Incorrect Answers
A:Failure-mode testing reveals the real default authorization. By contrast, measured protection must retain required network control traffic.
B:Authorization should disappear when the contract ends. It would not resolve the documented symptom; measured protection must retain required network control traffic.
D:Authentication success does not prove correct authorization. The relevant technical distinction is that measured protection must retain required network control traffic.
Question 647
A switch's control plane faces excessive unknown traffic from one compromised edge port. Which belief about the configuration should the team reject?
- Disable all security logs to reduce switch CPU while leaving attack traffic unrestricted
- Turn off server-certificate checks to eliminate authentication prompts
- Use MAC filtering as the sole defense against a capable attacker
- Disable certificate validation on all supplicants to make EAP-TLS succeed
Explanation
Correct Answer
A:Less monitoring does not stop packet floods. Rate-based protection can prevent one endpoint from exhausting shared resources.
Incorrect Answers
B:The client could then trust a malicious authenticator. The relevant technical distinction is that less monitoring does not stop packet floods.
C:MAC addresses can be observed and impersonated. By contrast, less monitoring does not stop packet floods.
D:This removes the authentication assurance the method was chosen to provide. Here, however, less monitoring does not stop packet floods.
Question 648
A switch's control plane faces excessive unknown traffic from one compromised edge port. What should be included in the rollout plan to limit a foreseeable failure?
- Maintain redundant authentication infrastructure and a limited emergency-access policy
- Require explicit deny checks whenever guest roles or VLAN mappings change
- Validate thresholds for legitimate discovery and routing messages
- Document key rotation, supported client transition and immediate incident response
Explanation
Correct Answer
C:Overly strict controls can destabilize the network itself. Measured protection must retain required network control traffic.
Incorrect Answers
A:Resilience should preserve least privilege during identity outages. Here, however, overly strict controls can destabilize the network itself.
B:A template error can expose protected systems at scale. The relevant technical distinction is that overly strict controls can destabilize the network itself.
D:A hurried change must not leave critical devices offline. In this situation, overly strict controls can destabilize the network itself.
Question 649
A building uses an EAP-TLS SSID but a device certificate was revoked and still authenticates. What should the network engineer do to address this requirement?
- Apply the approved guest isolation and deny internal subnet access at the enforcement boundary
- Classify the detection using BSSID, RF and wired-network evidence before containment
- Transition the intended access to managed individual authentication or rotate compromised credentials
- Verify certificate revocation checking and the approved RADIUS trust policy
Explanation
Correct Answer
D:A previously issued but revoked credential should not grant indefinite access. Actual rejection proves revocation enforcement works.
Incorrect Answers
A:An SSID name alone is not a security policy. In this situation, a previously issued but revoked credential should not grant indefinite access.
B:Neighbor networks can be visible without being unauthorized corporate equipment. Here, however, a previously issued but revoked credential should not grant indefinite access.
C:A shared leaked PSK grants anyone possessing it potential access. It would not resolve the documented symptom; a previously issued but revoked credential should not grant indefinite access.
Question 650
A building uses an EAP-TLS SSID but a device certificate was revoked and still authenticates. What should the team inspect to confirm the result?
- Verify deprecated insecure services are disabled and administrative sessions use secure protocols
- Check contract expiry, assigned role and denied internal destinations
- Attempt an authorized controlled test with the revoked identity and inspect rejection events
- Compare accepted legitimate ARP and rejected spoofed frames in violation logs
Explanation
Correct Answer
C:Actual rejection proves revocation enforcement works. A previously issued but revoked credential should not grant indefinite access.
Incorrect Answers
A:A documented policy is not proof the old listener is closed. In this situation, actual rejection proves revocation enforcement works.
B:Authorization should disappear when the contract ends. It would not resolve the documented symptom; actual rejection proves revocation enforcement works.
D:The control should distinguish authentic bindings from forged claims. By contrast, actual rejection proves revocation enforcement works.
HPE Network Campus Access Professional (HPE7-A01) Practice Tests
