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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.
Question 851
A call quality complaint has no port errors but shows 40ms variable delay and packet loss; what application KPI should be evaluated?
- Review host application and endpoint metrics
- Check scheduler and queue mapping
- Compare jitter, delay and loss measurements
- Review DSCP and ingress trust markings
Explanation
Correct Answer
C:Measure jitter, latency and loss against voice requirements. Voice/video quality depends on observed service behavior, not only port bandwidth statistics.
Incorrect Answers
A:A slow application can result from endpoint CPU or DNS despite clean switching and queues. But this does not address the case requirement to quantify real-time QoS impact.
B:Priority, weighted scheduling and DSCP-to-queue mapping govern each traffic class under load. But this does not address the case requirement to quantify real-time QoS impact.
D:Service-class information may be rewritten at ingress, changing how packets are prioritized. But this does not address the case requirement to quantify real-time QoS impact.
Question 852
A client application is slow while switch queues and port counters are clean, but host DNS requests regularly time out. Where should diagnostics expand?
- Review host application and endpoint metrics
- Check scheduler and queue mapping
- Compare jitter, delay and loss measurements
- Review DSCP and ingress trust markings
Explanation
Correct Answer
A:Investigate endpoint and application metrics instead of altering switch scheduling. A slow application can result from endpoint CPU or DNS despite clean switching and queues.
Incorrect Answers
B:Priority, weighted scheduling and DSCP-to-queue mapping govern each traffic class under load. But this does not address the case requirement to localize host-side delay.
C:Voice/video quality depends on observed service behavior, not only port bandwidth statistics. But this does not address the case requirement to localize host-side delay.
D:Service-class information may be rewritten at ingress, changing how packets are prioritized. But this does not address the case requirement to localize host-side delay.
Question 853
After a port-policy update, DSCP becomes 0 and interactive traffic changes queue. What should be traced?
- Review host application and endpoint metrics
- Review DSCP and ingress trust markings
- Compare jitter, delay and loss measurements
- Inspect policer hit and drop rates
Explanation
Correct Answer
B:Ingress DSCP trust and rewrite behavior. Service-class information may be rewritten at ingress, changing how packets are prioritized.
Incorrect Answers
A:A slow application can result from endpoint CPU or DNS despite clean switching and queues. But this does not address the case requirement to verify markings entering the network.
C:Voice/video quality depends on observed service behavior, not only port bandwidth statistics. But this does not address the case requirement to verify markings entering the network.
D:A rate-limiting policy can discard excess traffic even without total port saturation. But this does not address the case requirement to verify markings entering the network.
Question 854
Video drops coincide with one specific egress queue overflow while other queues remain clear. What should the operator monitor?
- Review host application and endpoint metrics
- Compare jitter, delay and loss measurements
- Inspect output queue counters
- Check scheduler and queue mapping
Explanation
Correct Answer
C:Per-queue drop and occupancy counters identify affected class. Per-class drops and occupancy reveal congestion that overall link-up status conceals.
Incorrect Answers
A: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 class-specific congestion.
B:Voice/video quality depends on observed service behavior, not only port bandwidth statistics. But this does not address the case requirement to diagnose class-specific congestion.
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 class-specific congestion.
Question 855
A 100Mbps policing policy remains configured but users expect 300Mbps service. Which measurements should support a fix?
- Review DSCP and ingress trust markings
- Inspect policer hit and drop rates
- Inspect output queue counters
- Check scheduler and queue mapping
Explanation
Correct Answer
B:Policer counters and configured rate identify the throughput ceiling. A rate-limiting policy can discard excess traffic even without total port saturation.
Incorrect Answers
A:Service-class information may be rewritten at ingress, changing how packets are prioritized. But this does not address the case requirement to confirm enforced cap.
C:Per-class drops and occupancy reveal congestion that overall link-up status conceals. But this does not address the case requirement to confirm enforced cap.
D:Priority, weighted scheduling and DSCP-to-queue mapping govern each traffic class under load. But this does not address the case requirement to confirm enforced cap.
Question 856
Central shows a switch offline for five minutes, but onsite users still forward locally. What management status should be interpreted?
- Review device inventory and connectivity status
- Check group compliance and configuration audit
- Correlate client and uplink health metrics
- Use targeted historical trend reports
Explanation
Correct Answer
A:A Central connectivity flag may signal cloud-management reachability rather than total data-plane failure. Offline versus online flags and last-seen times distinguish unreachable management from operational client impact.
Incorrect Answers
B:Device effective configuration can diverge from intended Central policy because of sync failure or unsupported commands. But this does not address the case requirement to distinguish managed connectivity from forwarding.
C:Client experience and switch port health can reveal where a service path is failing. But this does not address the case requirement to distinguish managed connectivity from forwarding.
D:Trend data distinguishes recurrent degradation from a short harmless spike. But this does not address the case requirement to distinguish managed connectivity from forwarding.
Question 857
A Central group demands VLAN 70 but show running-config on several members omits it. Which monitoring page is relevant?
- Correlate client and uplink health metrics
- Inspect site and switch alert timelines
- Check group compliance and configuration audit
- Review device inventory and connectivity status
Explanation
Correct Answer
C:Configuration audit and compliance reveal intent-state divergence. Device effective configuration can diverge from intended Central policy because of sync failure or unsupported commands.
Incorrect Answers
A:Client experience and switch port health can reveal where a service path is failing. But this does not address the case requirement to identify drift or failed deployment.
B:Chronological site-level events reveal correlated device failures and repeated outages. But this does not address the case requirement to identify drift or failed deployment.
D:Offline versus online flags and last-seen times distinguish unreachable management from operational client impact. But this does not address the case requirement to identify drift or failed deployment.
Question 858
Fifteen access switches at one site go unreachable at the same second after an upstream outage. What evidence helps correlate?
- Check group compliance and configuration audit
- Inspect site and switch alert timelines
- Review firmware compliance status
- Use targeted historical trend reports
Explanation
Correct Answer
B:Use shared site alert timestamps and outage chronology. Chronological site-level events reveal correlated device failures and repeated outages.
Incorrect Answers
A:Device effective configuration can diverge from intended Central policy because of sync failure or unsupported commands. But this does not address the case requirement to identify common upstream dependency.
C:Running device software may differ from approved group baseline and block supported policy deployment. But this does not address the case requirement to identify common upstream dependency.
D:Trend data distinguishes recurrent degradation from a short harmless spike. But this does not address the case requirement to identify common upstream dependency.
Question 859
Only a subset of switches fail a new template push and all report older OS builds. What compliance should be reviewed?
- Use targeted historical trend reports
- Correlate client and uplink health metrics
- Review firmware compliance status
- Inspect site and switch alert timelines
Explanation
Correct Answer
C:Compare approved CX firmware baseline and device running versions. Running device software may differ from approved group baseline and block supported policy deployment.
Incorrect Answers
A:Trend data distinguishes recurrent degradation from a short harmless spike. But this does not address the case requirement to diagnose release incompatibility.
B:Client experience and switch port health can reveal where a service path is failing. But this does not address the case requirement to diagnose release incompatibility.
D:Chronological site-level events reveal correlated device failures and repeated outages. But this does not address the case requirement to diagnose release incompatibility.
Question 860
A complaint affects wireless users on one floor; AP radios appear healthy but wired uplink errors rise. What telemetry should be correlated?
- Review firmware compliance status
- Use targeted historical trend reports
- Review device inventory and connectivity status
- Correlate client and uplink health metrics
Explanation
Correct Answer
D:Compare client metrics to physical uplink status and errors. Client experience and switch port health can reveal where a service path is failing.
Incorrect Answers
A:Running device software may differ from approved group baseline and block supported policy deployment. But this does not address the case requirement to localize wired backhaul problems.
B:Trend data distinguishes recurrent degradation from a short harmless spike. But this does not address the case requirement to localize wired backhaul problems.
C:Offline versus online flags and last-seen times distinguish unreachable management from operational client impact. But this does not address the case requirement to localize wired backhaul problems.
HPE Network Switching Professional (HPE7-A08) Practice Tests