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Question 790
A wired office reports that only one VLAN lost connectivity after an access switch firmware update. Which misconception is most likely to obstruct a correct fix?
- Replace every upstream router because some VLANs remain reachable
- Reboot every AP because a historical red dashboard icon persists
- Turn off network authentication to avoid a confusing user prompt
- Rewrite BGP communities to repair corrupted Ethernet frames
Explanation
Correct Answer
A:Partial failure does not prove global router hardware failure. A single-VLAN outage often points to a scoped configuration or software difference.
Incorrect Answers
B:A stale alarm is not proof devices currently fail. It would not resolve the documented symptom; partial failure does not prove global router hardware failure.
C:That bypasses rather than fixes certificate validation. In this situation, partial failure does not prove global router hardware failure.
D:Route policy cannot fix physical integrity faults. By contrast, partial failure does not prove global router hardware failure.
Question 791
A wired office reports that only one VLAN lost connectivity after an access switch firmware update. What precaution is most important before the change is expanded?
- Correct one pilot AP and then review the shared profile before mass deployment
- Alert on monitoring data age and confirm user impact before mass changes
- Retest portal onboarding from a clean device session after policy adjustment
- Test one repaired port and maintain rollback for the firmware change
Explanation
Correct Answer
D:Change control limits collateral impact. A targeted diff isolates the missing service.
Incorrect Answers
A:Shared template defects should not be rolled out blindly. It would not resolve the documented symptom; change control limits collateral impact.
B:Operational decisions should use current evidence. The relevant technical distinction is that change control limits collateral impact.
C:Cached browser states can hide continuing redirect problems. By contrast, change control limits collateral impact.
Question 792
A student Wi-Fi SSID shows full signal bars but its captive portal never displays. Which configuration decision most directly resolves the situation?
- Investigate RADIUS response time and server capacity rather than endpoint signal alone
- Inspect access VLAN, DHCP snooping trust and server/relay reachability
- Trace association, DHCP, DNS, guest policy and portal redirect in order
- Review IPv6-specific ACL, router advertisements and neighbor discovery
Explanation
Correct Answer
C:Each stage has distinct dependencies beyond radio signal. The earliest failing step identifies the correct team.
Incorrect Answers
A:Overloaded authentication infrastructure can delay otherwise correct exchanges. The relevant technical distinction is that each stage has distinct dependencies beyond radio signal.
B:A wrong patch or trunk membership can direct offers from the wrong scope. Here, however, each stage has distinct dependencies beyond radio signal.
D:Dual-stack policy components are separate and can fail independently. By contrast, each stage has distinct dependencies beyond radio signal.
Question 793
A student Wi-Fi SSID shows full signal bars but its captive portal never displays. Which check most directly demonstrates the desired network behavior?
- Compare client ARP, effective role and switch gateway counters for a test packet
- Compare error rate using a known-good cable or optic under the same load
- Trace DHCP Discover and Offer VLAN tags from client to server
- Capture the first failed DNS or HTTP redirect request and inspect policy logs
Explanation
Correct Answer
D:The earliest failing step identifies the correct team. Each stage has distinct dependencies beyond radio signal.
Incorrect Answers
A:Evidence locates the first blocked or missing hop. Here, however, the earliest failing step identifies the correct team.
B:Controlled substitution isolates a physical defect. The relevant technical distinction is that the earliest failing step identifies the correct team.
C:Packet path evidence reveals where the incorrect network is selected. In this situation, the earliest failing step identifies the correct team.
Question 794
A student Wi-Fi SSID shows full signal bars but its captive portal never displays. Which assumption would be most misleading when investigating this situation?
- Reboot every AP because a historical red dashboard icon persists
- Increase AP power to fix a portal server that is unreachable through guest policy
- Assume neighbor Full means every user application must be reachable
- Assume a successful IPv4 ping proves the IPv6 path is permitted
Explanation
Correct Answer
B:More signal does not correct service routing. Each stage has distinct dependencies beyond radio signal.
Incorrect Answers
A:A stale alarm is not proof devices currently fail. In this situation, more signal does not correct service routing.
C:OSPF adjacency is not application connectivity. Here, however, more signal does not correct service routing.
D:IPv4 and IPv6 use different addresses and filters. It would not resolve the documented symptom; more signal does not correct service routing.
Question 795
A student Wi-Fi SSID shows full signal bars but its captive portal never displays. Which safeguard best reduces the deployment risk in this case?
- Retest portal onboarding from a clean device session after policy adjustment
- Test secondary next-hop reachability before enabling a broad route change
- Document the replaced component and confirm port errors remain stable
- Record the precise failing flow and change one component at a time
Explanation
Correct Answer
A:Cached browser states can hide continuing redirect problems. The earliest failing step identifies the correct team.
Incorrect Answers
B:A fix should preserve intended failover behavior. In this situation, cached browser states can hide continuing redirect problems.
C:Intermittent media faults can recur after short tests. It would not resolve the documented symptom; cached browser states can hide continuing redirect problems.
D:Broad simultaneous edits obscure the defect. By contrast, cached browser states can hide continuing redirect problems.
Question 796
A switch uplink is operational but users report random failures after a cable vendor change. What is the most appropriate first technical change?
- Inspect CRC/FCS errors, optics and physical negotiation before changing routing
- Review IPv6-specific ACL, router advertisements and neighbor discovery
- Check telemetry timestamp and management connection before assuming a data-plane failure
- Inspect access VLAN, DHCP snooping trust and server/relay reachability
Explanation
Correct Answer
A:Frame errors can degrade service without dropping carrier. Controlled substitution isolates a physical defect.
Incorrect Answers
B:Dual-stack policy components are separate and can fail independently. The relevant technical distinction is that frame errors can degrade service without dropping carrier.
C:A stale dashboard can be disconnected from current user experience. By contrast, frame errors can degrade service without dropping carrier.
D:A wrong patch or trunk membership can direct offers from the wrong scope. It would not resolve the documented symptom; frame errors can degrade service without dropping carrier.
Question 797
A switch uplink is operational but users report random failures after a cable vendor change. Which observation would best verify that the intended behavior is working?
- Capture the first failed DNS or HTTP redirect request and inspect policy logs
- Inspect BGP best path and recursive route lookup to the physical egress
- Compare error rate using a known-good cable or optic under the same load
- Correlate server resource graphs, request latency and failed user sessions
Explanation
Correct Answer
C:Controlled substitution isolates a physical defect. Frame errors can degrade service without dropping carrier.
Incorrect Answers
A:The earliest failing step identifies the correct team. By contrast, controlled substitution isolates a physical defect.
B:The chain reveals the missing transport dependency. Here, however, controlled substitution isolates a physical defect.
D:Matching peaks demonstrate the backend bottleneck. The relevant technical distinction is that controlled substitution isolates a physical defect.
Question 798
A switch uplink is operational but users report random failures after a cable vendor change. Which belief about the configuration should the team reject?
- Change the AP's radio channel without examining the working association and lease
- Replace every upstream router because some VLANs remain reachable
- Assume neighbor Full means every user application must be reachable
- Rewrite BGP communities to repair corrupted Ethernet frames
Explanation
Correct Answer
D:Route policy cannot fix physical integrity faults. Frame errors can degrade service without dropping carrier.
Incorrect Answers
A:Good RF cannot repair a blocked gateway policy. The relevant technical distinction is that route policy cannot fix physical integrity faults.
B:Partial failure does not prove global router hardware failure. In this situation, route policy cannot fix physical integrity faults.
C:OSPF adjacency is not application connectivity. Here, however, route policy cannot fix physical integrity faults.
Question 799
A switch uplink is operational but users report random failures after a cable vendor change. What should be included in the rollout plan to limit a foreseeable failure?
- Document the replaced component and confirm port errors remain stable
- Correct one pilot AP and then review the shared profile before mass deployment
- Pilot the corrected supplicant profile and preserve a safe enrollment network
- Retest portal onboarding from a clean device session after policy adjustment
Explanation
Correct Answer
A:Intermittent media faults can recur after short tests. Controlled substitution isolates a physical defect.
Incorrect Answers
B:Shared template defects should not be rolled out blindly. Here, however, intermittent media faults can recur after short tests.
C:Devices need a recovery path for certificate-profile mistakes. In this situation, intermittent media faults can recur after short tests.
D:Cached browser states can hide continuing redirect problems. It would not resolve the documented symptom; intermittent media faults can recur after short tests.
Question 800
A wired EAP-TLS client repeatedly requests a password even though its device certificate is installed. Which THREE steps together deliver the change, verify its effect, and reduce rollout risk? Choose THREE.
- Check the selected route, return path, ACL and actual firewall/state policy
- Compare the SSID profile, assigned role/VLAN and upstream switch tagging
- Inspect certificate trust, supplicant EAP method and RADIUS failure codes
- Pilot the corrected supplicant profile and preserve a safe enrollment network
- Test one repaired port and maintain rollback for the firmware change
- Compare EAP exchange and certificate selection to the intended authentication profile
Explanation
Correct Answers
C:A wrong EAP profile or trust chain can surface as a generic login prompt. Handshake evidence identifies credential versus configuration error.
D:Devices need a recovery path for certificate-profile mistakes. Handshake evidence identifies credential versus configuration error.
F:Handshake evidence identifies credential versus configuration error. A wrong EAP profile or trust chain can surface as a generic login prompt.
Incorrect Answers
A:Control-plane learning does not guarantee data-plane delivery. By contrast, a wrong EAP profile or trust chain can surface as a generic login prompt.
B:Device management and client data can use different network paths. In this situation, a wrong EAP profile or trust chain can surface as a generic login prompt.
E:Change control limits collateral impact. It would not resolve the documented symptom; devices need a recovery path for certificate-profile mistakes.
HPE Network Campus Access Professional (HPE7-A01) Practice Tests
