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Question 880
A busy wireless campus has clients on 2.4 GHz when 5 GHz offers cleaner capacity. Which belief about the configuration should the team reject?
- Assume nominal aggregate dual-link bandwidth remains unchanged after one link fails
- Block all UDP traffic to reduce video usage without distinguishing real-time applications
- Disable 2.4 GHz immediately for all devices without checking scanner support
- Assume a low five-minute average utilization guarantees zero short-term queue loss
Explanation
Correct Answer
C:Single-band legacy devices may lose connectivity. Moving compatible users can reduce 2.4 GHz contention.
Incorrect Answers
A:Losing a physical link reduces available capacity. In this situation, single-band legacy devices may lose connectivity.
B:Many legitimate conferencing and voice flows use UDP. By contrast, single-band legacy devices may lose connectivity.
D:Averages can hide momentary saturation. It would not resolve the documented symptom; single-band legacy devices may lose connectivity.
Question 881
A busy wireless campus has clients on 2.4 GHz when 5 GHz offers cleaner capacity. What should be included in the rollout plan to limit a foreseeable failure?
- Pilot with mixed hardware and monitor reassociation failures
- Size a surviving uplink for the largest critical single-flow demand
- Address interference first and then retest application latency
- Validate client capability and latency during a phased channel-plan change
Explanation
Correct Answer
A:Compatibility must shape the capacity plan. Effective steering should improve actual service, not just association counts.
Incorrect Answers
B:Aggregate capacity does not guarantee per-flow throughput. It would not resolve the documented symptom; compatibility must shape the capacity plan.
C:A bandwidth upgrade cannot fix the RF collision environment. The relevant technical distinction is that compatibility must shape the capacity plan.
D:A new width can affect older devices and regulatory choices. By contrast, compatibility must shape the capacity plan.
Question 882
A routing core uses ECMP but its traffic distribution is skewed because most demand is one large flow. What should the network engineer do to address this requirement?
- Review minimum/basic rates with measured coverage and legacy client requirements
- Coordinate the provider's supported QoS class mapping and local ingress/egress policy
- Review per-flow hashing and consider supported aggregation or application-level distribution
- Refine application/role classification and adjust shaping only for the intended bulk content
Explanation
Correct Answer
C:A single flow may not spread across multiple equal-cost paths. The contrast demonstrates the distribution granularity.
Incorrect Answers
A:Slow management traffic consumes disproportionate airtime in dense cells. Here, however, a single flow may not spread across multiple equal-cost paths.
B:End-to-end prioritization depends on preserved or translated markings. The relevant technical distinction is that a single flow may not spread across multiple equal-cost paths.
D:Broad media categories can unintentionally include required live instruction. By contrast, a single flow may not spread across multiple equal-cost paths.
Question 883
A routing core uses ECMP but its traffic distribution is skewed because most demand is one large flow. What should the team inspect to confirm the result?
- Measure call jitter, queue drops and marking preservation across wired/wireless hops
- Measure interactive latency and backup throughput during representative simultaneous load
- Inspect client band choice, channel utilization and user throughput after a trial
- Compare next-hop counters for many independent flows versus one transfer
Explanation
Correct Answer
D:The contrast demonstrates the distribution granularity. A single flow may not spread across multiple equal-cost paths.
Incorrect Answers
A:Voice quality must improve on the actual congested path. The relevant technical distinction is that the contrast demonstrates the distribution granularity.
B:Both service classes should remain within business targets. In this situation, the contrast demonstrates the distribution granularity.
C:Effective steering should improve actual service, not just association counts. Here, however, the contrast demonstrates the distribution granularity.
Question 884
A routing core uses ECMP but its traffic distribution is skewed because most demand is one large flow. Which misconception is most likely to obstruct a correct fix?
- Accept every client DSCP value as an approved enterprise 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
- Remove all QoS classification so both applications compete without any prioritization
Explanation
Correct Answer
B:Hash-based load balancing typically pins a flow to one path. A single flow may not spread across multiple equal-cost paths.
Incorrect Answers
A:Untrusted endpoints can abuse premium queues. In this situation, hash-based load balancing typically pins a flow to one path.
C:Channel width cannot remove physical shadowing. Here, however, hash-based load balancing typically pins a flow to one path.
D:Eliminating controls may worsen low-latency traffic service. It would not resolve the documented symptom; hash-based load balancing typically pins a flow to one path.
Question 885
A routing core uses ECMP but its traffic distribution is skewed because most demand is one large flow. What precaution is most important before the change is expanded?
- Provide a restricted compatible SSID or managed replacement plan
- Limit mis-marking by untrusted clients and document class boundaries
- Size a surviving uplink for the largest critical single-flow demand
- Address interference first and then retest application latency
Explanation
Correct Answer
C:Aggregate capacity does not guarantee per-flow throughput. The contrast demonstrates the distribution granularity.
Incorrect Answers
A:Performance improvements should include a supported transition for older devices. In this situation, aggregate capacity does not guarantee per-flow throughput.
B:Priority abuse can starve ordinary educational services. By contrast, aggregate capacity does not guarantee per-flow throughput.
D:A bandwidth upgrade cannot fix the RF collision environment. It would not resolve the documented symptom; aggregate capacity does not guarantee per-flow throughput.
Question 886
A warehouse Wi-Fi network experiences high jitter when forklifts block the direct RF path. Which TWO actions together implement the required change and verify that it works? Choose TWO.
- Audit application categories and protect minimum bandwidth for non-voice services
- Review antenna placement, multipath and fallback coverage around moving obstructions
- Investigate RF SNR, channel contention and client rates instead of assuming spare airtime
- Measure SNR, retry rates and application latency along the equipment routes
- Apply supported WMM and end-to-end QoS marking for voice while maintaining normal data policy
Explanation
Correct Answers
B:Temporary shielding can change signal-to-noise and retransmission needs. A moving RF survey captures the conditions that cause jitter.
D:A moving RF survey captures the conditions that cause jitter. Temporary shielding can change signal-to-noise and retransmission needs.
Incorrect Answers
A:Excessive priority reservation can starve needed background traffic. By contrast, operational activity changes the propagation environment.
C:Repeated failed frames consume radio time even when payload throughput is low. It would not resolve the documented symptom; temporary shielding can change signal-to-noise and retransmission needs.
E:Priority handling can reduce voice delay under contention. The relevant technical distinction is that temporary shielding can change signal-to-noise and retransmission needs.
Question 887
A warehouse Wi-Fi network experiences high jitter when forklifts block the direct RF path. Which check most directly demonstrates the desired network behavior?
- Inspect client band choice, channel utilization and user throughput after a trial
- Compare combined AP traffic, uplink saturation and queue drops during a busy class
- Compare failing client capability against changed WLAN parameters and association logs
- Measure SNR, retry rates and application latency along the equipment routes
Explanation
Correct Answer
D:A moving RF survey captures the conditions that cause jitter. Temporary shielding can change signal-to-noise and retransmission needs.
Incorrect Answers
A:Effective steering should improve actual service, not just association counts. The relevant technical distinction is that a moving RF survey captures the conditions that cause jitter.
B:Correlation identifies the wired bottleneck behind a healthy WLAN signal. Here, however, a moving RF survey captures the conditions that cause jitter.
C:The exact mismatch identifies what optimization broke compatibility. By contrast, a moving RF survey captures the conditions that cause jitter.
Question 888
A warehouse Wi-Fi network experiences high jitter when forklifts block the direct RF path. Which assumption would be most misleading when investigating this situation?
- Accept every client DSCP value as an approved enterprise priority
- Assume one TCP flow will saturate the sum of every ECMP uplink rate
- Block all UDP traffic to reduce video usage without distinguishing real-time applications
- Set an AP's channel width to maximum and assume metal obstruction ceases to matter
Explanation
Correct Answer
D:Channel width cannot remove physical shadowing. Temporary shielding can change signal-to-noise and retransmission needs.
Incorrect Answers
A:Untrusted endpoints can abuse premium queues. The relevant technical distinction is that channel width cannot remove physical shadowing.
B:Hash-based load balancing typically pins a flow to one path. Here, however, channel width cannot remove physical shadowing.
C:Many legitimate conferencing and voice flows use UDP. In this situation, channel width cannot remove physical shadowing.
Question 889
A warehouse Wi-Fi network experiences high jitter when forklifts block the direct RF path. Which safeguard best reduces the deployment risk in this case?
- Test with real warehouse movements before finalizing radio power
- Size a surviving uplink for the largest critical single-flow demand
- Rebalance queues on a pilot interface and verify other application classes
- Validate client capability and latency during a phased channel-plan change
Explanation
Correct Answer
A:Operational activity changes the propagation environment. A moving RF survey captures the conditions that cause jitter.
Incorrect Answers
B:Aggregate capacity does not guarantee per-flow throughput. In this situation, operational activity changes the propagation environment.
C:Fixing one class should not starve another. Here, however, operational activity changes the propagation environment.
D:A new width can affect older devices and regulatory choices. It would not resolve the documented symptom; operational activity changes the propagation environment.
Question 890
A school improves average Wi-Fi throughput but several older laptops stop associating. What is the most appropriate first technical change?
- Evaluate narrower channels and improved reuse based on measured co-channel occupancy
- Reassess minimum rates, security mode and band/channel compatibility for supported legacy clients
- Apply supported WMM and end-to-end QoS marking for voice while maintaining normal data policy
- Investigate RF SNR, channel contention and client rates instead of assuming spare airtime
Explanation
Correct Answer
B:A faster design can exclude hardware without newer radio features. The exact mismatch identifies what optimization broke compatibility.
Incorrect Answers
A:Wide channels can reduce the number of nonoverlapping cells. In this situation, a faster design can exclude hardware without newer radio features.
C:Priority handling can reduce voice delay under contention. By contrast, a faster design can exclude hardware without newer radio features.
D:Repeated failed frames consume radio time even when payload throughput is low. It would not resolve the documented symptom; a faster design can exclude hardware without newer radio features.
HPE Network Campus Access Professional (HPE7-A01) Practice Tests