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HP HPE7-A01 Practice Test 85

Question 840

An auditorium Wi-Fi cell has many users on a low basic data rate, consuming most of the radio airtime. Which assumption would be most misleading when investigating this situation?

  1. Assume a low five-minute average utilization guarantees zero short-term queue loss
  2. Replace core routing tables to fix a radio capability mismatch
  3. Maximize advertised transmit power instead of addressing long low-rate airtime use
  4. Assume low useful throughput always means the AP is underutilized

Explanation

Correct Answer

C:

More signal does not remove the airtime cost of slow transmissions. Slow management traffic consumes disproportionate airtime in dense cells.

Incorrect Answers

A:

Averages can hide momentary saturation. By contrast, more signal does not remove the airtime cost of slow transmissions.

B:

Wired routes cannot make a client support unsupported WLAN settings. In this situation, more signal does not remove the airtime cost of slow transmissions.

D:

Failed transmissions can occupy most of the channel. It would not resolve the documented symptom; more signal does not remove the airtime cost of slow transmissions.

Question 841

An auditorium Wi-Fi cell has many users on a low basic data rate, consuming most of the radio airtime. Which safeguard best reduces the deployment risk in this case?

  1. Record contracted QoS behavior and test failover through secondary carriers
  2. Pilot basic-rate changes with the oldest approved client group
  3. Provide a restricted compatible SSID or managed replacement plan
  4. Audit application categories and protect minimum bandwidth for non-voice services

Explanation

Correct Answer

B:

Incompatible edge devices can lose service after aggressive tuning. Higher rates are useful only when edge devices still operate.

Incorrect Answers

A:

Backup networks may not honor the same traffic classes. The relevant technical distinction is that incompatible edge devices can lose service after aggressive tuning.

C:

Performance improvements should include a supported transition for older devices. By contrast, incompatible edge devices can lose service after aggressive tuning.

D:

Excessive priority reservation can starve needed background traffic. It would not resolve the documented symptom; incompatible edge devices can lose service after aggressive tuning.

Question 842

A school wants voice calls prioritized over bulk student downloads on a busy wireless network. What is the most appropriate first technical change?

  1. Coordinate the provider's supported QoS class mapping and local ingress/egress policy
  2. Apply supported WMM and end-to-end QoS marking for voice while maintaining normal data policy
  3. Reassess minimum rates, security mode and band/channel compatibility for supported legacy clients
  4. Refine application/role classification and adjust shaping only for the intended bulk content

Explanation

Correct Answer

B:

Priority handling can reduce voice delay under contention. Voice quality must improve on the actual congested path.

Incorrect Answers

A:

End-to-end prioritization depends on preserved or translated markings. Here, however, priority handling can reduce voice delay under contention.

C:

A faster design can exclude hardware without newer radio features. The relevant technical distinction is that priority handling can reduce voice delay under contention.

D:

Broad media categories can unintentionally include required live instruction. By contrast, priority handling can reduce voice delay under contention.

Question 843

A school wants voice calls prioritized over bulk student downloads on a busy wireless network. Which observation would best verify that the intended behavior is working?

  1. Measure call jitter, queue drops and marking preservation across wired/wireless hops
  2. Compare failing client capability against changed WLAN parameters and association logs
  3. Compare next-hop counters for many independent flows versus one transfer
  4. Compare channel utilization and client connection success before and after rate tuning

Explanation

Correct Answer

A:

Voice quality must improve on the actual congested path. Priority handling can reduce voice delay under contention.

Incorrect Answers

B:

The exact mismatch identifies what optimization broke compatibility. In this situation, voice quality must improve on the actual congested path.

C:

The contrast demonstrates the distribution granularity. Here, however, voice quality must improve on the actual congested path.

D:

Higher rates are useful only when edge devices still operate. The relevant technical distinction is that voice quality must improve on the actual congested path.

Question 844

A school wants voice calls prioritized over bulk student downloads on a busy wireless network. Which belief about the configuration should the team reject?

  1. Set every traffic class to the highest queue priority
  2. Assume one TCP flow will saturate the sum of every ECMP uplink rate
  3. Set an AP's channel width to maximum and assume metal obstruction ceases to matter
  4. Increase each AP's transmit power and expect the wired uplink capacity to grow

Explanation

Correct Answer

A:

If all packets are premium, prioritization has no value. Priority handling can reduce voice delay under contention.

Incorrect Answers

B:

Hash-based load balancing typically pins a flow to one path. It would not resolve the documented symptom; if all packets are premium, prioritization has no value.

C:

Channel width cannot remove physical shadowing. In this situation, if all packets are premium, prioritization has no value.

D:

Radio power cannot change the uplink's physical rate. Here, however, if all packets are premium, prioritization has no value.

Question 845

A school wants voice calls prioritized over bulk student downloads on a busy wireless network. What should be included in the rollout plan to limit a foreseeable failure?

  1. Limit mis-marking by untrusted clients and document class boundaries
  2. Size a surviving uplink for the largest critical single-flow demand
  3. Pilot basic-rate changes with the oldest approved client group
  4. Validate client capability and latency during a phased channel-plan change

Explanation

Correct Answer

A:

Priority abuse can starve ordinary educational services. Voice quality must improve on the actual congested path.

Incorrect Answers

B:

Aggregate capacity does not guarantee per-flow throughput. In this situation, priority abuse can starve ordinary educational services.

C:

Incompatible edge devices can lose service after aggressive tuning. It would not resolve the documented symptom; priority abuse can starve ordinary educational services.

D:

A new width can affect older devices and regulatory choices. By contrast, priority abuse can starve ordinary educational services.

Question 846

A routed campus uplink is saturated by nightly backups during office hours. What should the network engineer do to address this requirement?

  1. Schedule or shape backup traffic with an approved lower-priority class
  2. Define trust boundaries for DSCP markings and remark untrusted edge traffic
  3. Size and aggregate uplinks according to measured AP demand and switch capability
  4. Capacity-plan QoS classes for the surviving link and test degraded-path congestion

Explanation

Correct Answer

A:

Noncritical bulk transfers should yield when interactive demand rises. Both service classes should remain within business targets.

Incorrect Answers

B:

User-provided priority tags must not override business policy. It would not resolve the documented symptom; noncritical bulk transfers should yield when interactive demand rises.

C:

A shared physical bottleneck can cap total WLAN performance. The relevant technical distinction is that noncritical bulk transfers should yield when interactive demand rises.

D:

Redundancy reduces available bandwidth during a failure. By contrast, noncritical bulk transfers should yield when interactive demand rises.

Question 847

A routed campus uplink is saturated by nightly backups during office hours. What should the team inspect to confirm the result?

  1. Inspect ingress classification and queue selection for marked and unmarked test traffic
  2. Measure interactive latency and backup throughput during representative simultaneous load
  3. Test a live class, bulk stream and ordinary browsing under the revised policy
  4. Compare retries, noise floor and channel busy time for affected clients

Explanation

Correct Answer

B:

Both service classes should remain within business targets. Noncritical bulk transfers should yield when interactive demand rises.

Incorrect Answers

A:

The effective treatment shows whether trust rules are applied. By contrast, both service classes should remain within business targets.

C:

Three service types reveal whether the change is appropriately targeted. Here, however, both service classes should remain within business targets.

D:

The measurements distinguish interference from insufficient capacity. The relevant technical distinction is that both service classes should remain within business targets.

Question 848

A routed campus uplink is saturated by nightly backups during office hours. Which misconception is most likely to obstruct a correct fix?

  1. Block all UDP traffic to reduce video usage without distinguishing real-time applications
  2. Disable OSPF to reduce application bandwidth use
  3. Assume a low five-minute average utilization guarantees zero short-term queue loss
  4. Assume a wider channel always improves total campus throughput regardless of density

Explanation

Correct Answer

B:

Routing adjacency is not the bulk traffic load source. Noncritical bulk transfers should yield when interactive demand rises.

Incorrect Answers

A:

Many legitimate conferencing and voice flows use UDP. Here, however, routing adjacency is not the bulk traffic load source.

C:

Averages can hide momentary saturation. The relevant technical distinction is that routing adjacency is not the bulk traffic load source.

D:

High overlap can cancel any per-link bandwidth advantage. In this situation, routing adjacency is not the bulk traffic load source.

Question 849

A routed campus uplink is saturated by nightly backups during office hours. What precaution is most important before the change is expanded?

  1. Audit application categories and protect minimum bandwidth for non-voice services
  2. Implement a tested shaping policy with emergency backup exceptions
  3. Validate client capability and latency during a phased channel-plan change
  4. Pilot basic-rate changes with the oldest approved client group

Explanation

Correct Answer

B:

Performance tuning should not prevent essential recovery jobs. Both service classes should remain within business targets.

Incorrect Answers

A:

Excessive priority reservation can starve needed background traffic. Here, however, performance tuning should not prevent essential recovery jobs.

C:

A new width can affect older devices and regulatory choices. It would not resolve the documented symptom; performance tuning should not prevent essential recovery jobs.

D:

Incompatible edge devices can lose service after aggressive tuning. In this situation, performance tuning should not prevent essential recovery jobs.

Question 850

A Wi-Fi deployment uses 80 MHz channels but effective throughput falls as neighboring APs are added. Which configuration decision most directly resolves the situation?

  1. Evaluate narrower channels and improved reuse based on measured co-channel occupancy
  2. Evaluate supported band steering and cell design without excluding legacy clients
  3. Reassess minimum rates, security mode and band/channel compatibility for supported legacy clients
  4. Size and aggregate uplinks according to measured AP demand and switch capability

Explanation

Correct Answer

A:

Wide channels can reduce the number of nonoverlapping cells. Site-wide performance matters more than one AP's PHY rate.

Incorrect Answers

B:

Moving compatible users can reduce 2.4 GHz contention. By contrast, wide channels can reduce the number of nonoverlapping cells.

C:

A faster design can exclude hardware without newer radio features. It would not resolve the documented symptom; wide channels can reduce the number of nonoverlapping cells.

D:

A shared physical bottleneck can cap total WLAN performance. In this situation, wide channels can reduce the number of nonoverlapping cells.

HPE Network Campus Access Professional (HPE7-A01) Practice Tests

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