HP HPE7-A01 Practice Test 80
Question 790
A campus voice WLAN experiences delays because dense multicast traffic is transmitted at low basic rates to every associated station. After the root cause is confirmed, which narrowly scoped configuration action should be selected?
- Enforce supported multicast or broadcast containment and efficient delivery settings without blocking required discovery traffic.
- Enforce approved scheduling, policing or shaping that protects sensitive traffic while retaining reasonable bulk service.
- Enforce a bounded QoS trust policy that preserves approved application markings and remarks untrusted client claims.
- Enforce supported WMM voice mapping and appropriate end-to-end QoS for eligible real-time application packets.
Explanation
Correct Answer
A:Enforce supported multicast or broadcast containment and efficient delivery settings without blocking required discovery traffic. Broadcast and low-rate multicast consume shared radio airtime across receivers; optimization must preserve essential control and discovery protocols. The proposed configuration targets the stated dependency without broadening unrelated access. The decision applies to the described multicast and broadcast airtime optimization situation.
Incorrect Answers
B:Enforce approved scheduling, policing or shaping that protects sensitive traffic while retaining reasonable bulk service. This instead concerns queue congestion and shaping. QoS queue management controls contention at the egress bottleneck; high interface bandwidth alone does not guarantee low delay under bursts. It would not implement the specifically required change. The immediate problem concerns multicast and broadcast airtime optimization.
C:Enforce a bounded QoS trust policy that preserves approved application markings and remarks untrusted client claims. This instead concerns dscp trust boundary and remarking. DiffServ classes depend on consistent markings and intentional trust; accepting every endpoint's markings lets applications impersonate priority traffic. It would not implement the specifically required change. The immediate problem concerns multicast and broadcast airtime optimization.
D: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 multicast and broadcast airtime optimization.
Question 791
A campus voice WLAN experiences delays because dense multicast traffic is transmitted at low basic rates to every associated station. A deployment job reports success. Which observed result would actually validate the affected service?
- Confirm critical latency and packet loss targets under concurrent load, with bounded drops in appropriate lower-priority queues.
- Confirm legitimate voice packets retain intended DSCP while spoofed high-priority client packets are rewritten.
- Quantify voice latency and jitter during concurrent bulk traffic and verify the voice access category is used.
- Confirm reduced airtime occupancy while necessary DHCP, ARP and service discovery still function.
Explanation
Correct Answer
D:Confirm reduced airtime occupancy while necessary DHCP, ARP and service discovery still function. Broadcast and low-rate multicast consume shared radio airtime across receivers; optimization must preserve essential control and discovery protocols. The result tests actual working behavior, not merely a saved configuration. The decision applies to the described multicast and broadcast airtime optimization situation.
Incorrect Answers
A:Confirm critical latency and packet loss targets under concurrent load, with bounded drops in appropriate lower-priority queues. This instead concerns queue congestion and shaping. QoS queue management controls contention at the egress bottleneck; high interface bandwidth alone does not guarantee low delay under bursts. It would not establish that this function actually works. The immediate problem concerns multicast and broadcast airtime optimization.
B:Confirm legitimate voice packets retain intended DSCP while spoofed high-priority client packets are rewritten. This instead concerns dscp trust boundary and remarking. DiffServ classes depend on consistent markings and intentional trust; accepting every endpoint's markings lets applications impersonate priority traffic. It would not establish that this function actually works. The immediate problem concerns multicast and broadcast airtime optimization.
C: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 multicast and broadcast airtime optimization.
Question 792
A campus voice WLAN experiences delays because dense multicast traffic is transmitted at low basic rates to every associated station. If the revised setting disrupts users, which controlled rollback would be most relevant?
- Reinstate prior safe scheduling and limit the offending bulk flow if the new policy starves required applications.
- Reinstate the last reviewed trust boundary and remarking policy if queues are starved or markings are lost.
- Reinstate the prior permitted broadcast and multicast forwarding if legitimate devices lose discovery capability.
- Reinstate the last healthy QoS mapping and cap competing bulk traffic while investigating the misclassification.
Explanation
Correct Answer
C:Reinstate the prior permitted broadcast and multicast forwarding if legitimate devices lose discovery capability. Broadcast and low-rate multicast consume shared radio airtime across receivers; optimization must preserve essential control and discovery protocols. The focused rollback restores a known safe baseline before another change attempt. The decision applies to the described multicast and broadcast airtime optimization situation.
Incorrect Answers
A:Reinstate prior safe scheduling and limit the offending bulk flow if the new policy starves required applications. This instead concerns queue congestion and shaping. QoS queue management controls contention at the egress bottleneck; high interface bandwidth alone does not guarantee low delay under bursts. It would not safely roll back the relevant failed change. The immediate problem concerns multicast and broadcast airtime optimization.
B:Reinstate the last reviewed trust boundary and remarking policy if queues are starved or markings are lost. This instead concerns dscp trust boundary and remarking. DiffServ classes depend on consistent markings and intentional trust; accepting every endpoint's markings lets applications impersonate priority traffic. It would not safely roll back the relevant failed change. The immediate problem concerns multicast and broadcast airtime optimization.
D: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 multicast and broadcast airtime optimization.
Question 793
A campus WAN uplink drops real-time application packets whenever backup traffic fills the egress queue. Which investigation would best isolate the immediate network dependency?
- Inspect packet DSCP at ingress and egress and the switch's configured trust and remarking maps.
- Inspect WMM access-category mapping, queue counters and handset traffic classification.
- Inspect egress queue occupancy, drop counters and application classifications under representative load.
- Inspect per-client PHY rates, airtime consumption and supported fairness scheduling behavior.
Explanation
Correct Answer
C:Inspect egress queue occupancy, drop counters and application classifications under representative load. QoS queue management controls contention at the egress bottleneck; high interface bandwidth alone does not guarantee low delay under bursts. The evidence check isolates the relevant prerequisite before a disruptive change. The decision applies to the described queue congestion and shaping situation.
Incorrect Answers
A:Inspect packet DSCP at ingress and egress and the switch's configured trust and remarking maps. This instead concerns dscp trust boundary and remarking. DiffServ classes depend on consistent markings and intentional trust; accepting every endpoint's markings lets applications impersonate priority traffic. It does not isolate the cause of the stated incident. The immediate problem concerns queue congestion and shaping.
B:Inspect WMM access-category mapping, queue counters and handset traffic classification. 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 does not isolate the cause of the stated incident. The immediate problem concerns queue congestion and shaping.
D: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 queue congestion and shaping.
Question 794
A campus WAN uplink drops real-time application packets whenever backup traffic fills the egress queue. Which specific corrective design step best meets the stated campus requirement?
- Apply a bounded QoS trust policy that preserves approved application markings and remarks untrusted client claims.
- Apply approved scheduling, policing or shaping that protects sensitive traffic while retaining reasonable bulk service.
- 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.
Explanation
Correct Answer
B:Apply approved scheduling, policing or shaping that protects sensitive traffic while retaining reasonable bulk service. QoS queue management controls contention at the egress bottleneck; high interface bandwidth alone does not guarantee low delay under bursts. The proposed configuration targets the stated dependency without broadening unrelated access. The decision applies to the described queue congestion and shaping situation.
Incorrect Answers
A:Apply a bounded QoS trust policy that preserves approved application markings and remarks untrusted client claims. This instead concerns dscp trust boundary and remarking. DiffServ classes depend on consistent markings and intentional trust; accepting every endpoint's markings lets applications impersonate priority traffic. It would not implement the specifically required change. The immediate problem concerns queue congestion and shaping.
C:Apply 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 queue congestion and shaping.
D: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 queue congestion and shaping.
Question 795
A campus WAN uplink drops real-time application packets whenever backup traffic fills the egress queue. Following a targeted change, which acceptance test would most directly demonstrate success?
- Verify critical latency and packet loss targets under concurrent load, with bounded drops in appropriate lower-priority queues.
- Verify legitimate voice packets retain intended DSCP while spoofed high-priority client packets are rewritten.
- Measure voice latency and jitter during concurrent bulk traffic and verify the voice access category is used.
- Verify multiple clients gain fair airtime and application throughput without excluding required low-capability devices.
Explanation
Correct Answer
A:Verify critical latency and packet loss targets under concurrent load, with bounded drops in appropriate lower-priority queues. QoS queue management controls contention at the egress bottleneck; high interface bandwidth alone does not guarantee low delay under bursts. The result tests actual working behavior, not merely a saved configuration. The decision applies to the described queue congestion and shaping situation.
Incorrect Answers
B:Verify legitimate voice packets retain intended DSCP while spoofed high-priority client packets are rewritten. This instead concerns dscp trust boundary and remarking. DiffServ classes depend on consistent markings and intentional trust; accepting every endpoint's markings lets applications impersonate priority traffic. It would not establish that this function actually works. The immediate problem concerns queue congestion and shaping.
C:Measure 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 queue congestion and shaping.
D: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 queue congestion and shaping.
Question 796
A campus WAN uplink drops real-time application packets whenever backup traffic fills the egress queue. The change fails acceptance. What is the safest targeted restoration action?
- Restore the last reviewed trust boundary and remarking policy if queues are starved or markings are lost.
- Restore the last healthy QoS mapping and cap competing bulk traffic while investigating the misclassification.
- Restore prior airtime scheduling settings if the change harms legitimate client connectivity at cell edges.
- Restore prior safe scheduling and limit the offending bulk flow if the new policy starves required applications.
Explanation
Correct Answer
D:Restore prior safe scheduling and limit the offending bulk flow if the new policy starves required applications. QoS queue management controls contention at the egress bottleneck; high interface bandwidth alone does not guarantee low delay under bursts. The focused rollback restores a known safe baseline before another change attempt. The decision applies to the described queue congestion and shaping situation.
Incorrect Answers
A:Restore the last reviewed trust boundary and remarking policy if queues are starved or markings are lost. This instead concerns dscp trust boundary and remarking. DiffServ classes depend on consistent markings and intentional trust; accepting every endpoint's markings lets applications impersonate priority traffic. It would not safely roll back the relevant failed change. The immediate problem concerns queue congestion and shaping.
B:Restore 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 queue congestion and shaping.
C: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 queue congestion and shaping.
Question 797
A branch switch has adequate port speed but its shared queue depth rises sharply during software deployment and voice calls degrade. Before implementing a remedy, what should the engineer check first?
- Review packet DSCP at ingress and egress and the switch's configured trust and remarking maps.
- Review WMM access-category mapping, queue counters and handset traffic classification.
- Review egress queue occupancy, drop counters and application classifications under representative load.
- Review per-client PHY rates, airtime consumption and supported fairness scheduling behavior.
Explanation
Correct Answer
C:Review egress queue occupancy, drop counters and application classifications under representative load. QoS queue management controls contention at the egress bottleneck; high interface bandwidth alone does not guarantee low delay under bursts. The evidence check isolates the relevant prerequisite before a disruptive change. The decision applies to the described queue congestion and shaping situation.
Incorrect Answers
A:Review packet DSCP at ingress and egress and the switch's configured trust and remarking maps. This instead concerns dscp trust boundary and remarking. DiffServ classes depend on consistent markings and intentional trust; accepting every endpoint's markings lets applications impersonate priority traffic. It does not isolate the cause of the stated incident. The immediate problem concerns queue congestion and shaping.
B:Review WMM access-category mapping, queue counters and handset traffic classification. 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 does not isolate the cause of the stated incident. The immediate problem concerns queue congestion and shaping.
D: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 queue congestion and shaping.
Question 798
A branch switch has adequate port speed but its shared queue depth rises sharply during software deployment and voice calls degrade. After the root cause is confirmed, which narrowly scoped configuration action should be selected?
- Enforce a bounded QoS trust policy that preserves approved application markings and remarks untrusted client claims.
- Enforce approved scheduling, policing or shaping that protects sensitive traffic while retaining reasonable bulk service.
- 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.
Explanation
Correct Answer
B:Enforce approved scheduling, policing or shaping that protects sensitive traffic while retaining reasonable bulk service. QoS queue management controls contention at the egress bottleneck; high interface bandwidth alone does not guarantee low delay under bursts. The proposed configuration targets the stated dependency without broadening unrelated access. The decision applies to the described queue congestion and shaping situation.
Incorrect Answers
A:Enforce a bounded QoS trust policy that preserves approved application markings and remarks untrusted client claims. This instead concerns dscp trust boundary and remarking. DiffServ classes depend on consistent markings and intentional trust; accepting every endpoint's markings lets applications impersonate priority traffic. It would not implement the specifically required change. The immediate problem concerns queue congestion and shaping.
C: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 queue congestion and shaping.
D: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 queue congestion and shaping.
Question 799
A branch switch has adequate port speed but its shared queue depth rises sharply during software deployment and voice calls degrade. A deployment job reports success. Which observed result would actually validate the affected service?
- Confirm critical latency and packet loss targets under concurrent load, with bounded drops in appropriate lower-priority queues.
- Confirm legitimate voice packets retain intended DSCP while spoofed high-priority client packets are rewritten.
- 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.
Explanation
Correct Answer
A:Confirm critical latency and packet loss targets under concurrent load, with bounded drops in appropriate lower-priority queues. QoS queue management controls contention at the egress bottleneck; high interface bandwidth alone does not guarantee low delay under bursts. The result tests actual working behavior, not merely a saved configuration. The decision applies to the described queue congestion and shaping situation.
Incorrect Answers
B:Confirm legitimate voice packets retain intended DSCP while spoofed high-priority client packets are rewritten. This instead concerns dscp trust boundary and remarking. DiffServ classes depend on consistent markings and intentional trust; accepting every endpoint's markings lets applications impersonate priority traffic. It would not establish that this function actually works. The immediate problem concerns queue congestion and shaping.
C: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 queue congestion and shaping.
D: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 queue congestion and shaping.
Question 800
A branch switch has adequate port speed but its shared queue depth rises sharply during software deployment and voice calls degrade. If the revised setting disrupts users, which controlled rollback would be most relevant?
- Reinstate the last reviewed trust boundary and remarking policy if queues are starved or markings are lost.
- Reinstate the last healthy QoS mapping and cap competing bulk traffic while investigating the misclassification.
- Reinstate prior airtime scheduling settings if the change harms legitimate client connectivity at cell edges.
- Reinstate prior safe scheduling and limit the offending bulk flow if the new policy starves required applications.
Explanation
Correct Answer
D:Reinstate prior safe scheduling and limit the offending bulk flow if the new policy starves required applications. QoS queue management controls contention at the egress bottleneck; high interface bandwidth alone does not guarantee low delay under bursts. The focused rollback restores a known safe baseline before another change attempt. The decision applies to the described queue congestion and shaping situation.
Incorrect Answers
A:Reinstate the last reviewed trust boundary and remarking policy if queues are starved or markings are lost. This instead concerns dscp trust boundary and remarking. DiffServ classes depend on consistent markings and intentional trust; accepting every endpoint's markings lets applications impersonate priority traffic. It would not safely roll back the relevant failed change. The immediate problem concerns queue congestion and shaping.
B: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 queue congestion and shaping.
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 queue congestion and shaping.
