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Question 840
An employee authenticates but gets guest VLAN and cannot reach payroll. What output should be examined?
- Check administrator authentication audit
- Inspect 802.1X supplicant and session state
- Check RADIUS request/response logs
- Review dynamic role and VLAN mapping
Explanation
Correct Answer
D:The returned dynamic role or VLAN controls effective access. A successful login can still receive the wrong network role and restricted policy.
Incorrect Answers
A:Management AAA logs reveal who accessed the switch and whether privileged commands were authorized. But this does not address the case requirement to diagnose role mapping.
B:Authentication may fail due to EAP negotiation, credential or authorization status independent of physical carrier. But this does not address the case requirement to diagnose role mapping.
C:AAA server timeouts and policy rejects distinguish transport failure from an intentional denial. But this does not address the case requirement to diagnose role mapping.
Question 841
A new ACL precedes a permit and its deny counter rises for approved HTTPS sessions. What state should be checked?
- Examine ACL counters and hit order
- Check administrator authentication audit
- Check RADIUS request/response logs
- Review dynamic role and VLAN mapping
Explanation
Correct Answer
A:ACL rule hits and order reveal shadowed traffic. Rule hit statistics help identify whether an unexpected deny is shadowing allowed traffic.
Incorrect Answers
B:Management AAA logs reveal who accessed the switch and whether privileged commands were authorized. But this does not address the case requirement to identify unexpected deny match.
C:AAA server timeouts and policy rejects distinguish transport failure from an intentional denial. But this does not address the case requirement to identify unexpected deny match.
D:A successful login can still receive the wrong network role and restricted policy. But this does not address the case requirement to identify unexpected deny match.
Question 842
A rogue DHCP server is plugged into an edge port and DHCP snooping starts incrementing violations. What event type indicates protection?
- Inspect 802.1X supplicant and session state
- Check administrator authentication audit
- Examine ACL counters and hit order
- Inspect DHCP snooping violation events
Explanation
Correct Answer
D:First-hop security is blocking an untrusted DHCP source. Unauthorized DHCP source or binding anomalies may be blocked by first-hop security.
Incorrect Answers
A:Authentication may fail due to EAP negotiation, credential or authorization status independent of physical carrier. But this does not address the case requirement to interpret DHCP snooping event.
B:Management AAA logs reveal who accessed the switch and whether privileged commands were authorized. But this does not address the case requirement to interpret DHCP snooping event.
C:Rule hit statistics help identify whether an unexpected deny is shadowing allowed traffic. But this does not address the case requirement to interpret DHCP snooping event.
Question 843
A network change occurred at 03:00 and the audit team needs the administrator who logged in. What telemetry should be reviewed?
- Examine ACL counters and hit order
- Check administrator authentication audit
- Check RADIUS request/response logs
- Inspect DHCP snooping violation events
Explanation
Correct Answer
B:Management AAA/audit records identify user access and authorization. Management AAA logs reveal who accessed the switch and whether privileged commands were authorized.
Incorrect Answers
A:Rule hit statistics help identify whether an unexpected deny is shadowing allowed traffic. But this does not address the case requirement to attribute privileged activity.
C:AAA server timeouts and policy rejects distinguish transport failure from an intentional denial. But this does not address the case requirement to attribute privileged activity.
D:Unauthorized DHCP source or binding anomalies may be blocked by first-hop security. But this does not address the case requirement to attribute privileged activity.
Question 844
An employee device has healthy link counters but authentication remains failed after certificate renewal. What should be checked?
- Review dynamic role and VLAN mapping
- Check RADIUS request/response logs
- Inspect 802.1X supplicant and session state
- Examine ACL counters and hit order
Explanation
Correct Answer
C:The 802.1X session and EAP exchange show the authorization failure. Authentication may fail due to EAP negotiation, credential or authorization status independent of physical carrier.
Incorrect Answers
A:A successful login can still receive the wrong network role and restricted policy. But this does not address the case requirement to diagnose identity session state.
B:AAA server timeouts and policy rejects distinguish transport failure from an intentional denial. But this does not address the case requirement to diagnose identity session state.
D:Rule hit statistics help identify whether an unexpected deny is shadowing allowed traffic. But this does not address the case requirement to diagnose identity session state.
Question 845
An application denies traffic only after a policy rollout, and one ACL counter suddenly jumps. Which evidence should be inspected?
- Inspect DHCP snooping violation events
- Review dynamic role and VLAN mapping
- Examine ACL counters and hit order
- Check RADIUS request/response logs
Explanation
Correct Answer
C:The matching rule's hit count and precedence locate the enforced denial. Rule hit statistics help identify whether an unexpected deny is shadowing allowed traffic.
Incorrect Answers
A:Unauthorized DHCP source or binding anomalies may be blocked by first-hop security. But this does not address the case requirement to identify security policy conflict.
B:A successful login can still receive the wrong network role and restricted policy. But this does not address the case requirement to identify security policy conflict.
D:AAA server timeouts and policy rejects distinguish transport failure from an intentional denial. But this does not address the case requirement to identify security policy conflict.
Question 846
A correct certificate succeeds but dynamic user access role is restricted. What returned attribute should be verified?
- Review dynamic role and VLAN mapping
- Inspect DHCP snooping violation events
- Inspect 802.1X supplicant and session state
- Examine ACL counters and hit order
Explanation
Correct Answer
A:AAA role/VLAN enforcement result defines authorized segmentation. A successful login can still receive the wrong network role and restricted policy.
Incorrect Answers
B:Unauthorized DHCP source or binding anomalies may be blocked by first-hop security. But this does not address the case requirement to explain postauthentication access denial.
C:Authentication may fail due to EAP negotiation, credential or authorization status independent of physical carrier. But this does not address the case requirement to explain postauthentication access denial.
D:Rule hit statistics help identify whether an unexpected deny is shadowing allowed traffic. But this does not address the case requirement to explain postauthentication access denial.
Question 847
An IP phone sends EF but a campus trust port rewrites packets to default class. What packet field should be inspected?
- Review DSCP and ingress trust markings
- Inspect policer hit and drop rates
- Review host application and endpoint metrics
- Check scheduler and queue mapping
Explanation
Correct Answer
A:Follow DSCP handling across the ingress trust boundary. Service-class information may be rewritten at ingress, changing how packets are prioritized.
Incorrect Answers
B:A rate-limiting policy can discard excess traffic even without total port saturation. But this does not address the case requirement to diagnose classification loss.
C:A slow application can result from endpoint CPU or DNS despite clean switching and queues. But this does not address the case requirement to diagnose classification loss.
D:Priority, weighted scheduling and DSCP-to-queue mapping govern each traffic class under load. But this does not address the case requirement to diagnose classification loss.
Question 848
Calls degrade despite 50% average port usage, and one voice egress queue reports packet drops. What counters matter?
- Compare jitter, delay and loss measurements
- Check scheduler and queue mapping
- Review DSCP and ingress trust markings
- Inspect output queue counters
Explanation
Correct Answer
D:Inspect class-specific queue drops rather than only total utilization. Per-class drops and occupancy reveal congestion that overall link-up status conceals.
Incorrect Answers
A:Voice/video quality depends on observed service behavior, not only port bandwidth statistics. But this does not address the case requirement to identify priority queue congestion.
B:Priority, weighted scheduling and DSCP-to-queue mapping govern each traffic class under load. But this does not address the case requirement to identify priority queue congestion.
C:Service-class information may be rewritten at ingress, changing how packets are prioritized. But this does not address the case requirement to identify priority queue congestion.
Question 849
A switch receives correctly marked EF packets but places them into an ordinary weighted queue. What policy should be examined?
- Compare jitter, delay and loss measurements
- Check scheduler and queue mapping
- Inspect policer hit and drop rates
- Review DSCP and ingress trust markings
Explanation
Correct Answer
B:Queue map and scheduler determine service for correctly marked packets. Priority, weighted scheduling and DSCP-to-queue mapping govern each traffic class under load.
Incorrect Answers
A:Voice/video quality depends on observed service behavior, not only port bandwidth statistics. But this does not address the case requirement to identify incorrect local QoS policy.
C:A rate-limiting policy can discard excess traffic even without total port saturation. But this does not address the case requirement to identify incorrect local QoS policy.
D:Service-class information may be rewritten at ingress, changing how packets are prioritized. But this does not address the case requirement to identify incorrect local QoS policy.
Question 850
A traffic stream is dropped exactly above a configured 50Mbps profile though interface line rate is 1Gbps. What policy counters should be analyzed?
- Inspect output queue counters
- Review host application and endpoint metrics
- Inspect policer hit and drop rates
- Compare jitter, delay and loss measurements
Explanation
Correct Answer
C:Policer drop statistics reveal intentional rate enforcement. A rate-limiting policy can discard excess traffic even without total port saturation.
Incorrect Answers
A:Per-class drops and occupancy reveal congestion that overall link-up status conceals. But this does not address the case requirement to identify traffic policing.
B:A slow application can result from endpoint CPU or DNS despite clean switching and queues. But this does not address the case requirement to identify traffic policing.
D:Voice/video quality depends on observed service behavior, not only port bandwidth statistics. But this does not address the case requirement to identify traffic policing.
HPE Network Switching Professional (HPE7-A08) Practice Tests