HP HPE7-A01 Practice Test 76
Question 750
A campus video collaboration system marks every packet as high priority and the QoS design unintentionally trusts all endpoint markings. After the root cause is confirmed, which narrowly scoped configuration action should be selected?
- Enforce supported WMM voice mapping and appropriate end-to-end QoS for eligible real-time application packets.
- Tune supported airtime fairness and RF coverage so low-rate stations cannot monopolize the shared channel for the affected campus deployment.
- Select RF channel widths that balance available spectrum, number of APs and target client density.
- Enforce a bounded QoS trust policy that preserves approved application markings and remarks untrusted client claims.
Explanation
Correct Answer
D:Enforce a bounded QoS trust policy that preserves approved application markings and remarks untrusted client claims. DiffServ classes depend on consistent markings and intentional trust; accepting every endpoint's markings lets applications impersonate priority traffic. The proposed configuration targets the stated dependency without broadening unrelated access. The decision applies to the described dscp trust boundary and remarking situation.
Incorrect Answers
A:Enforce supported WMM voice mapping and appropriate end-to-end QoS for eligible real-time application packets. This instead concerns 802.11e wmm voice queues. WMM differentiates wireless contention by access category; a voice SSID label does not automatically prioritize packet airtime. It would not implement the specifically required change. The immediate problem concerns dscp trust boundary and remarking.
B:Tune supported airtime fairness and RF coverage so low-rate stations cannot monopolize the shared channel for the affected campus deployment. This instead concerns airtime fairness across slow clients. Wireless airtime is shared by time rather than raw bytes; slow stations can consume disproportionate transmission opportunity. It would not implement the specifically required change. The immediate problem concerns dscp trust boundary and remarking.
C:Select RF channel widths that balance available spectrum, number of APs and target client density. This instead concerns channel width for capacity optimization. Increasing width increases potential peak rate but decreases independent channels, so dense WLAN design often prefers more reuse. It would not implement the specifically required change. The immediate problem concerns dscp trust boundary and remarking.
Question 751
A campus video collaboration system marks every packet as high priority and the QoS design unintentionally trusts all endpoint markings. A deployment job reports success. Which observed result would actually validate the affected service?
- Quantify voice latency and jitter during concurrent bulk traffic and verify the voice access category is used.
- Confirm multiple clients gain fair airtime and application throughput without excluding required low-capability devices.
- Confirm legitimate voice packets retain intended DSCP while spoofed high-priority client packets are rewritten.
- Confirm busy-hour aggregate throughput and retry rates improve under a comparable workload.
Explanation
Correct Answer
C:Confirm legitimate voice packets retain intended DSCP while spoofed high-priority client packets are rewritten. DiffServ classes depend on consistent markings and intentional trust; accepting every endpoint's markings lets applications impersonate priority traffic. The result tests actual working behavior, not merely a saved configuration. The decision applies to the described dscp trust boundary and remarking situation.
Incorrect Answers
A:Quantify voice latency and jitter during concurrent bulk traffic and verify the voice access category is used. This instead concerns 802.11e wmm voice queues. WMM differentiates wireless contention by access category; a voice SSID label does not automatically prioritize packet airtime. It would not establish that this function actually works. The immediate problem concerns dscp trust boundary and remarking.
B:Confirm multiple clients gain fair airtime and application throughput without excluding required low-capability devices. This instead concerns airtime fairness across slow clients. Wireless airtime is shared by time rather than raw bytes; slow stations can consume disproportionate transmission opportunity. It would not establish that this function actually works. The immediate problem concerns dscp trust boundary and remarking.
D:Confirm busy-hour aggregate throughput and retry rates improve under a comparable workload. This instead concerns channel width for capacity optimization. Increasing width increases potential peak rate but decreases independent channels, so dense WLAN design often prefers more reuse. It would not establish that this function actually works. The immediate problem concerns dscp trust boundary and remarking.
Question 752
A campus video collaboration system marks every packet as high priority and the QoS design unintentionally trusts all endpoint markings. If the revised setting disrupts users, which controlled rollback would be most relevant?
- Reinstate the last healthy QoS mapping and cap competing bulk traffic while investigating the misclassification.
- Reinstate the last reviewed trust boundary and remarking policy if queues are starved or markings are lost.
- Reinstate prior airtime scheduling settings if the change harms legitimate client connectivity at cell edges.
- Reinstate the previously accepted channel widths and reuse map if the new configuration increases adjacent-cell interference.
Explanation
Correct Answer
B:Reinstate the last reviewed trust boundary and remarking policy if queues are starved or markings are lost. DiffServ classes depend on consistent markings and intentional trust; accepting every endpoint's markings lets applications impersonate priority traffic. The focused rollback restores a known safe baseline before another change attempt. The decision applies to the described dscp trust boundary and remarking situation.
Incorrect Answers
A:Reinstate the last healthy QoS mapping and cap competing bulk traffic while investigating the misclassification. This instead concerns 802.11e wmm voice queues. WMM differentiates wireless contention by access category; a voice SSID label does not automatically prioritize packet airtime. It would not safely roll back the relevant failed change. The immediate problem concerns dscp trust boundary and remarking.
C:Reinstate prior airtime scheduling settings if the change harms legitimate client connectivity at cell edges. This instead concerns airtime fairness across slow clients. Wireless airtime is shared by time rather than raw bytes; slow stations can consume disproportionate transmission opportunity. It would not safely roll back the relevant failed change. The immediate problem concerns dscp trust boundary and remarking.
D:Reinstate the previously accepted channel widths and reuse map if the new configuration increases adjacent-cell interference. This instead concerns channel width for capacity optimization. Increasing width increases potential peak rate but decreases independent channels, so dense WLAN design often prefers more reuse. It would not safely roll back the relevant failed change. The immediate problem concerns dscp trust boundary and remarking.
Question 753
Wi-Fi handsets have adequate signal but voice jitter rises because WMM voice traffic is mapped to best-effort access category. Which investigation would best isolate the immediate network dependency?
- Inspect per-client PHY rates, airtime consumption and supported fairness scheduling behavior.
- Inspect WMM access-category mapping, queue counters and handset traffic classification.
- Inspect site survey spectrum reuse, client PHY capabilities and channel utilization at the configured width.
- Inspect bidirectional RSSI and SNR, floorplan obstructions, client transmit capabilities and overlap with neighboring cells.
Explanation
Correct Answer
B:Inspect WMM access-category mapping, queue counters and handset traffic classification. WMM differentiates wireless contention by access category; a voice SSID label does not automatically prioritize packet airtime. The evidence check isolates the relevant prerequisite before a disruptive change. The decision applies to the described 802.11e wmm voice queues situation.
Incorrect Answers
A:Inspect per-client PHY rates, airtime consumption and supported fairness scheduling behavior. This instead concerns airtime fairness across slow clients. Wireless airtime is shared by time rather than raw bytes; slow stations can consume disproportionate transmission opportunity. It does not isolate the cause of the stated incident. The immediate problem concerns 802.11e wmm voice queues.
C:Inspect site survey spectrum reuse, client PHY capabilities and channel utilization at the configured width. This instead concerns channel width for capacity optimization. Increasing width increases potential peak rate but decreases independent channels, so dense WLAN design often prefers more reuse. It does not isolate the cause of the stated incident. The immediate problem concerns 802.11e wmm voice queues.
D:Inspect bidirectional RSSI and SNR, floorplan obstructions, client transmit capabilities and overlap with neighboring cells. This instead concerns ap placement and cell-edge design. Good downlink power from an AP cannot compensate for a weak client uplink or severe physical RF obstruction. It does not isolate the cause of the stated incident. The immediate problem concerns 802.11e wmm voice queues.
Question 754
Wi-Fi handsets have adequate signal but voice jitter rises because WMM voice traffic is mapped to best-effort access category. Which specific corrective design step best meets the stated campus requirement?
- Apply supported WMM voice mapping and appropriate end-to-end QoS for eligible real-time application packets.
- Tune supported airtime fairness and RF coverage so low-rate stations cannot monopolize the shared channel.
- Choose RF channel widths that balance available spectrum, number of APs and target client density.
- Relocate or add approved APs and rebalance cell size based on coverage and capacity survey data.
Explanation
Correct Answer
A:Apply supported WMM voice mapping and appropriate end-to-end QoS for eligible real-time application packets. WMM differentiates wireless contention by access category; a voice SSID label does not automatically prioritize packet airtime. The proposed configuration targets the stated dependency without broadening unrelated access. The decision applies to the described 802.11e wmm voice queues situation.
Incorrect Answers
B:Tune supported airtime fairness and RF coverage so low-rate stations cannot monopolize the shared channel. This instead concerns airtime fairness across slow clients. Wireless airtime is shared by time rather than raw bytes; slow stations can consume disproportionate transmission opportunity. It would not implement the specifically required change. The immediate problem concerns 802.11e wmm voice queues.
C:Choose RF channel widths that balance available spectrum, number of APs and target client density. This instead concerns channel width for capacity optimization. Increasing width increases potential peak rate but decreases independent channels, so dense WLAN design often prefers more reuse. It would not implement the specifically required change. The immediate problem concerns 802.11e wmm voice queues.
D:Relocate or add approved APs and rebalance cell size based on coverage and capacity survey data. This instead concerns ap placement and cell-edge design. Good downlink power from an AP cannot compensate for a weak client uplink or severe physical RF obstruction. It would not implement the specifically required change. The immediate problem concerns 802.11e wmm voice queues.
Question 755
Wi-Fi handsets have adequate signal but voice jitter rises because WMM voice traffic is mapped to best-effort access category. Following a targeted change, which acceptance test would most directly demonstrate success?
- Verify multiple clients gain fair airtime and application throughput without excluding required low-capability devices.
- Verify busy-hour aggregate throughput and retry rates improve under a comparable workload.
- Validate stable service on both uplink and downlink during a representative walk-through.
- Measure voice latency and jitter during concurrent bulk traffic and verify the voice access category is used.
Explanation
Correct Answer
D:Measure voice latency and jitter during concurrent bulk traffic and verify the voice access category is used. WMM differentiates wireless contention by access category; a voice SSID label does not automatically prioritize packet airtime. The result tests actual working behavior, not merely a saved configuration. The decision applies to the described 802.11e wmm voice queues situation.
Incorrect Answers
A:Verify multiple clients gain fair airtime and application throughput without excluding required low-capability devices. This instead concerns airtime fairness across slow clients. Wireless airtime is shared by time rather than raw bytes; slow stations can consume disproportionate transmission opportunity. It would not establish that this function actually works. The immediate problem concerns 802.11e wmm voice queues.
B:Verify busy-hour aggregate throughput and retry rates improve under a comparable workload. This instead concerns channel width for capacity optimization. Increasing width increases potential peak rate but decreases independent channels, so dense WLAN design often prefers more reuse. It would not establish that this function actually works. The immediate problem concerns 802.11e wmm voice queues.
C:Validate stable service on both uplink and downlink during a representative walk-through. This instead concerns ap placement and cell-edge design. Good downlink power from an AP cannot compensate for a weak client uplink or severe physical RF obstruction. It would not establish that this function actually works. The immediate problem concerns 802.11e wmm voice queues.
Question 756
Wi-Fi handsets have adequate signal but voice jitter rises because WMM voice traffic is mapped to best-effort access category. The change fails acceptance. What is the safest targeted restoration action?
- Restore prior airtime scheduling settings if the change harms legitimate client connectivity at cell edges.
- Restore the previously accepted channel widths and reuse map if the new configuration increases adjacent-cell interference.
- Restore the last healthy QoS mapping and cap competing bulk traffic while investigating the misclassification.
- Return to the last working AP location and power settings while retesting a less obstructed candidate site.
Explanation
Correct Answer
C:Restore the last healthy QoS mapping and cap competing bulk traffic while investigating the misclassification. WMM differentiates wireless contention by access category; a voice SSID label does not automatically prioritize packet airtime. The focused rollback restores a known safe baseline before another change attempt. The decision applies to the described 802.11e wmm voice queues situation.
Incorrect Answers
A:Restore prior airtime scheduling settings if the change harms legitimate client connectivity at cell edges. This instead concerns airtime fairness across slow clients. Wireless airtime is shared by time rather than raw bytes; slow stations can consume disproportionate transmission opportunity. It would not safely roll back the relevant failed change. The immediate problem concerns 802.11e wmm voice queues.
B:Restore the previously accepted channel widths and reuse map if the new configuration increases adjacent-cell interference. This instead concerns channel width for capacity optimization. Increasing width increases potential peak rate but decreases independent channels, so dense WLAN design often prefers more reuse. It would not safely roll back the relevant failed change. The immediate problem concerns 802.11e wmm voice queues.
D:Return to the last working AP location and power settings while retesting a less obstructed candidate site. This instead concerns ap placement and cell-edge design. Good downlink power from an AP cannot compensate for a weak client uplink or severe physical RF obstruction. It would not safely roll back the relevant failed change. The immediate problem concerns 802.11e wmm voice queues.
Question 757
A branch WLAN uses a voice-capable SSID but DSCP-to-WMM mapping is wrong and calls break up under file-transfer load. Before implementing a remedy, what should the engineer check first?
- Review per-client PHY rates, airtime consumption and supported fairness scheduling behavior.
- Review WMM access-category mapping, queue counters and handset traffic classification.
- Review site survey spectrum reuse, client PHY capabilities and channel utilization at the configured width.
- Review bidirectional RSSI and SNR, floorplan obstructions, client transmit capabilities and overlap with neighboring cells.
Explanation
Correct Answer
B:Review WMM access-category mapping, queue counters and handset traffic classification. WMM differentiates wireless contention by access category; a voice SSID label does not automatically prioritize packet airtime. The evidence check isolates the relevant prerequisite before a disruptive change. The decision applies to the described 802.11e wmm voice queues situation.
Incorrect Answers
A:Review per-client PHY rates, airtime consumption and supported fairness scheduling behavior. This instead concerns airtime fairness across slow clients. Wireless airtime is shared by time rather than raw bytes; slow stations can consume disproportionate transmission opportunity. It does not isolate the cause of the stated incident. The immediate problem concerns 802.11e wmm voice queues.
C:Review site survey spectrum reuse, client PHY capabilities and channel utilization at the configured width. This instead concerns channel width for capacity optimization. Increasing width increases potential peak rate but decreases independent channels, so dense WLAN design often prefers more reuse. It does not isolate the cause of the stated incident. The immediate problem concerns 802.11e wmm voice queues.
D:Review bidirectional RSSI and SNR, floorplan obstructions, client transmit capabilities and overlap with neighboring cells. This instead concerns ap placement and cell-edge design. Good downlink power from an AP cannot compensate for a weak client uplink or severe physical RF obstruction. It does not isolate the cause of the stated incident. The immediate problem concerns 802.11e wmm voice queues.
Question 758
A branch WLAN uses a voice-capable SSID but DSCP-to-WMM mapping is wrong and calls break up under file-transfer load. After the root cause is confirmed, which narrowly scoped configuration action should be selected?
- Enforce supported WMM voice mapping and appropriate end-to-end QoS for eligible real-time application packets.
- Tune supported airtime fairness and RF coverage so low-rate stations cannot monopolize the shared channel for the affected campus deployment.
- Select RF channel widths that balance available spectrum, number of APs and target client density.
- Relocate or add approved APs and rebalance cell size based on coverage and capacity survey data for the affected campus deployment.
Explanation
Correct Answer
A:Enforce supported WMM voice mapping and appropriate end-to-end QoS for eligible real-time application packets. WMM differentiates wireless contention by access category; a voice SSID label does not automatically prioritize packet airtime. The proposed configuration targets the stated dependency without broadening unrelated access. The decision applies to the described 802.11e wmm voice queues situation.
Incorrect Answers
B:Tune supported airtime fairness and RF coverage so low-rate stations cannot monopolize the shared channel for the affected campus deployment. This instead concerns airtime fairness across slow clients. Wireless airtime is shared by time rather than raw bytes; slow stations can consume disproportionate transmission opportunity. It would not implement the specifically required change. The immediate problem concerns 802.11e wmm voice queues.
C:Select RF channel widths that balance available spectrum, number of APs and target client density. This instead concerns channel width for capacity optimization. Increasing width increases potential peak rate but decreases independent channels, so dense WLAN design often prefers more reuse. It would not implement the specifically required change. The immediate problem concerns 802.11e wmm voice queues.
D:Relocate or add approved APs and rebalance cell size based on coverage and capacity survey data for the affected campus deployment. This instead concerns ap placement and cell-edge design. Good downlink power from an AP cannot compensate for a weak client uplink or severe physical RF obstruction. It would not implement the specifically required change. The immediate problem concerns 802.11e wmm voice queues.
Question 759
A branch WLAN uses a voice-capable SSID but DSCP-to-WMM mapping is wrong and calls break up under file-transfer load. A deployment job reports success. Which observed result would actually validate the affected service?
- Confirm multiple clients gain fair airtime and application throughput without excluding required low-capability devices.
- Confirm busy-hour aggregate throughput and retry rates improve under a comparable workload.
- Validate stable service on both uplink and downlink during a representative walk-through for the affected campus deployment.
- Quantify voice latency and jitter during concurrent bulk traffic and verify the voice access category is used.
Explanation
Correct Answer
D:Quantify voice latency and jitter during concurrent bulk traffic and verify the voice access category is used. WMM differentiates wireless contention by access category; a voice SSID label does not automatically prioritize packet airtime. The result tests actual working behavior, not merely a saved configuration. The decision applies to the described 802.11e wmm voice queues situation.
Incorrect Answers
A:Confirm multiple clients gain fair airtime and application throughput without excluding required low-capability devices. This instead concerns airtime fairness across slow clients. Wireless airtime is shared by time rather than raw bytes; slow stations can consume disproportionate transmission opportunity. It would not establish that this function actually works. The immediate problem concerns 802.11e wmm voice queues.
B:Confirm busy-hour aggregate throughput and retry rates improve under a comparable workload. This instead concerns channel width for capacity optimization. Increasing width increases potential peak rate but decreases independent channels, so dense WLAN design often prefers more reuse. It would not establish that this function actually works. The immediate problem concerns 802.11e wmm voice queues.
C:Validate stable service on both uplink and downlink during a representative walk-through for the affected campus deployment. This instead concerns ap placement and cell-edge design. Good downlink power from an AP cannot compensate for a weak client uplink or severe physical RF obstruction. It would not establish that this function actually works. The immediate problem concerns 802.11e wmm voice queues.
Question 760
A branch WLAN uses a voice-capable SSID but DSCP-to-WMM mapping is wrong and calls break up under file-transfer load. If the revised setting disrupts users, which controlled rollback would be most relevant?
- Reinstate prior airtime scheduling settings if the change harms legitimate client connectivity at cell edges.
- Reinstate the previously accepted channel widths and reuse map if the new configuration increases adjacent-cell interference.
- Reinstate the last healthy QoS mapping and cap competing bulk traffic while investigating the misclassification.
- Return to the last working AP location and power settings while retesting a less obstructed candidate site.
Explanation
Correct Answer
C:Reinstate the last healthy QoS mapping and cap competing bulk traffic while investigating the misclassification. WMM differentiates wireless contention by access category; a voice SSID label does not automatically prioritize packet airtime. The focused rollback restores a known safe baseline before another change attempt. The decision applies to the described 802.11e wmm voice queues situation.
Incorrect Answers
A:Reinstate prior airtime scheduling settings if the change harms legitimate client connectivity at cell edges. This instead concerns airtime fairness across slow clients. Wireless airtime is shared by time rather than raw bytes; slow stations can consume disproportionate transmission opportunity. It would not safely roll back the relevant failed change. The immediate problem concerns 802.11e wmm voice queues.
B:Reinstate the previously accepted channel widths and reuse map if the new configuration increases adjacent-cell interference. This instead concerns channel width for capacity optimization. Increasing width increases potential peak rate but decreases independent channels, so dense WLAN design often prefers more reuse. It would not safely roll back the relevant failed change. The immediate problem concerns 802.11e wmm voice queues.
D:Return to the last working AP location and power settings while retesting a less obstructed candidate site. This instead concerns ap placement and cell-edge design. Good downlink power from an AP cannot compensate for a weak client uplink or severe physical RF obstruction. It would not safely roll back the relevant failed change. The immediate problem concerns 802.11e wmm voice queues. For the incident in this item: A branch WLAN uses a voice-capable SSID but DSCP-to-WMM mapping is wrong and calls break up under file-transfer load.