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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?
- Assume a low five-minute average utilization guarantees zero short-term queue loss
- Replace core routing tables to fix a radio capability mismatch
- Maximize advertised transmit power instead of addressing long low-rate airtime use
- 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?
- Record contracted QoS behavior and test failover through secondary carriers
- Pilot basic-rate changes with the oldest approved client group
- Provide a restricted compatible SSID or managed replacement plan
- 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?
- Coordinate the provider's supported QoS class mapping and local ingress/egress policy
- Apply supported WMM and end-to-end QoS marking for voice while maintaining normal data policy
- Reassess minimum rates, security mode and band/channel compatibility for supported legacy clients
- 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?
- Measure call jitter, queue drops and marking preservation across wired/wireless hops
- Compare failing client capability against changed WLAN parameters and association logs
- Compare next-hop counters for many independent flows versus one transfer
- 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?
- Set every traffic class to the highest queue priority
- Assume one TCP flow will saturate the sum of every ECMP uplink rate
- Set an AP's channel width to maximum and assume metal obstruction ceases to matter
- 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?
- Limit mis-marking by untrusted clients and document class boundaries
- Size a surviving uplink for the largest critical single-flow demand
- Pilot basic-rate changes with the oldest approved client group
- 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?
- Schedule or shape backup traffic with an approved lower-priority class
- Define trust boundaries for DSCP markings and remark untrusted edge traffic
- Size and aggregate uplinks according to measured AP demand and switch capability
- 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?
- Inspect ingress classification and queue selection for marked and unmarked test traffic
- Measure interactive latency and backup throughput during representative simultaneous load
- Test a live class, bulk stream and ordinary browsing under the revised policy
- 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?
- Block all UDP traffic to reduce video usage without distinguishing real-time applications
- Disable OSPF to reduce application bandwidth use
- Assume a low five-minute average utilization guarantees zero short-term queue loss
- 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?
- Audit application categories and protect minimum bandwidth for non-voice services
- Implement a tested shaping policy with emergency backup exceptions
- Validate client capability and latency during a phased channel-plan change
- 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?
- Evaluate narrower channels and improved reuse based on measured co-channel occupancy
- Evaluate supported band steering and cell design without excluding legacy clients
- Reassess minimum rates, security mode and band/channel compatibility for supported legacy clients
- 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