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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.
Question 851
A Wi-Fi deployment uses 80 MHz channels but effective throughput falls as neighboring APs are added. Which check most directly demonstrates the desired network behavior?
- Correlate voice/video quality with burst counters and per-queue occupancy
- Test a live class, bulk stream and ordinary browsing under the revised policy
- Measure aggregate throughput, retries and channel utilization after changing width
- Inspect ingress classification and queue selection for marked and unmarked test traffic
Explanation
Correct Answer
C:Site-wide performance matters more than one AP's PHY rate. Wide channels can reduce the number of nonoverlapping cells.
Incorrect Answers
A:Fine-grained evidence exposes transient congestion. By contrast, site-wide performance matters more than one AP's PHY rate.
B:Three service types reveal whether the change is appropriately targeted. The relevant technical distinction is that site-wide performance matters more than one AP's PHY rate.
D:The effective treatment shows whether trust rules are applied. It would not resolve the documented symptom; site-wide performance matters more than one AP's PHY rate.
Question 852
A Wi-Fi deployment uses 80 MHz channels but effective throughput falls as neighboring APs are added. Which assumption would be most misleading when investigating this situation?
- Remove all QoS classification so both applications compete without any prioritization
- 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 wider channel always improves total campus throughput regardless of density
Explanation
Correct Answer
D:High overlap can cancel any per-link bandwidth advantage. Wide channels can reduce the number of nonoverlapping cells.
Incorrect Answers
A:Eliminating controls may worsen low-latency traffic service. By contrast, high overlap can cancel any per-link bandwidth advantage.
B:Many legitimate conferencing and voice flows use UDP. The relevant technical distinction is that high overlap can cancel any per-link bandwidth advantage.
C:Single-band legacy devices may lose connectivity. Here, however, high overlap can cancel any per-link bandwidth advantage.
Question 853
A Wi-Fi deployment uses 80 MHz channels but effective throughput falls as neighboring APs are added. Which safeguard best reduces the deployment risk in this case?
- Tune buffering and priority carefully with application-level measurements
- Audit application categories and protect minimum bandwidth for non-voice services
- 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
D:A new width can affect older devices and regulatory choices. Site-wide performance matters more than one AP's PHY rate.
Incorrect Answers
A:Uncontrolled QoS changes can harm other time-sensitive traffic. In this situation, a new width can affect older devices and regulatory choices.
B:Excessive priority reservation can starve needed background traffic. The relevant technical distinction is that a new width can affect older devices and regulatory choices.
C:Fixing one class should not starve another. Here, however, a new width can affect older devices and regulatory choices.
Question 854
A university moves classes online and users experience jitter even though overall switch bandwidth is below capacity. What is the most appropriate first technical change?
- Capacity-plan QoS classes for the surviving link and test degraded-path congestion
- Refine application/role classification and adjust shaping only for the intended bulk content
- Inspect per-port queue drops, microbursts and QoS classification
- Review class allocation and rate limits for video and voice separately
Explanation
Correct Answer
C:Short congestion bursts can disrupt real-time flows while averages look healthy. Fine-grained evidence exposes transient congestion.
Incorrect Answers
A:Redundancy reduces available bandwidth during a failure. In this situation, short congestion bursts can disrupt real-time flows while averages look healthy.
B:Broad media categories can unintentionally include required live instruction. It would not resolve the documented symptom; short congestion bursts can disrupt real-time flows while averages look healthy.
D:Application priorities and shaping limits need proportionate capacity. Here, however, short congestion bursts can disrupt real-time flows while averages look healthy.
Question 855
A university moves classes online and users experience jitter even though overall switch bandwidth is below capacity. Which observation would best verify that the intended behavior is working?
- Measure interactive latency and backup throughput during representative simultaneous load
- Correlate voice/video quality with burst counters and per-queue occupancy
- Compare failing client capability against changed WLAN parameters and association logs
- Compare retries, noise floor and channel busy time for affected clients
Explanation
Correct Answer
B:Fine-grained evidence exposes transient congestion. Short congestion bursts can disrupt real-time flows while averages look healthy.
Incorrect Answers
A:Both service classes should remain within business targets. By contrast, fine-grained evidence exposes transient congestion.
C:The exact mismatch identifies what optimization broke compatibility. In this situation, fine-grained evidence exposes transient congestion.
D:The measurements distinguish interference from insufficient capacity. It would not resolve the documented symptom; fine-grained evidence exposes transient congestion.
Question 856
A university moves classes online and users experience jitter even though overall switch bandwidth is below capacity. Which belief about the configuration should the team reject?
- Assume a low five-minute average utilization guarantees zero short-term queue loss
- Disable OSPF to reduce application bandwidth use
- Disable 2.4 GHz immediately for all devices without checking scanner support
- Assume low useful throughput always means the AP is underutilized
Explanation
Correct Answer
A:Averages can hide momentary saturation. Short congestion bursts can disrupt real-time flows while averages look healthy.
Incorrect Answers
B:Routing adjacency is not the bulk traffic load source. By contrast, averages can hide momentary saturation.
C:Single-band legacy devices may lose connectivity. It would not resolve the documented symptom; averages can hide momentary saturation.
D:Failed transmissions can occupy most of the channel. The relevant technical distinction is that averages can hide momentary saturation.
Question 857
A university moves classes online and users experience jitter even though overall switch bandwidth is below capacity. What should be included in the rollout plan to limit a foreseeable failure?
- Size a surviving uplink for the largest critical single-flow demand
- Provide a restricted compatible SSID or managed replacement plan
- Validate client capability and latency during a phased channel-plan change
- Tune buffering and priority carefully with application-level measurements
Explanation
Correct Answer
D:Uncontrolled QoS changes can harm other time-sensitive traffic. Fine-grained evidence exposes transient congestion.
Incorrect Answers
A:Aggregate capacity does not guarantee per-flow throughput. By contrast, uncontrolled QoS changes can harm other time-sensitive traffic.
B:Performance improvements should include a supported transition for older devices. Here, however, uncontrolled QoS changes can harm other time-sensitive traffic.
C:A new width can affect older devices and regulatory choices. The relevant technical distinction is that uncontrolled QoS changes can harm other time-sensitive traffic.
Question 858
A remote branch prioritizes real-time collaboration but clients can mark any traffic as high priority. Which TWO actions together implement the required change and verify that it works? Choose TWO.
- Review antenna placement, multipath and fallback coverage around moving obstructions
- Inspect ingress classification and queue selection for marked and unmarked test traffic
- Define trust boundaries for DSCP markings and remark untrusted edge traffic
- Address interference first and then retest application latency
- Evaluate supported band steering and cell design without excluding legacy clients
Explanation
Correct Answers
B:The effective treatment shows whether trust rules are applied. User-provided priority tags must not override business policy.
C:User-provided priority tags must not override business policy. The effective treatment shows whether trust rules are applied.
Incorrect Answers
A:Temporary shielding can change signal-to-noise and retransmission needs. In this situation, user-provided priority tags must not override business policy.
D:A bandwidth upgrade cannot fix the RF collision environment. Here, however, excessive priority reservation can starve needed background traffic.
E:Moving compatible users can reduce 2.4 GHz contention. The relevant technical distinction is that user-provided priority tags must not override business policy.
Question 859
A remote branch prioritizes real-time collaboration but clients can mark any traffic as high priority. What should the team inspect to confirm the result?
- Compare failing client capability against changed WLAN parameters and association logs
- Measure aggregate throughput, retries and channel utilization after changing width
- Compare channel utilization and client connection success before and after rate tuning
- Inspect ingress classification and queue selection for marked and unmarked test traffic
Explanation
Correct Answer
D:The effective treatment shows whether trust rules are applied. User-provided priority tags must not override business policy.
Incorrect Answers
A:The exact mismatch identifies what optimization broke compatibility. Here, however, the effective treatment shows whether trust rules are applied.
B:Site-wide performance matters more than one AP's PHY rate. It would not resolve the documented symptom; the effective treatment shows whether trust rules are applied.
C:Higher rates are useful only when edge devices still operate. In this situation, the effective treatment shows whether trust rules are applied.
Question 860
A remote branch prioritizes real-time collaboration but clients can mark any traffic as high priority. Which misconception is most likely to obstruct a correct fix?
- Remove all QoS classification so both applications compete without any prioritization
- Accept every client DSCP value as an approved enterprise priority
- Set an AP's channel width to maximum and assume metal obstruction ceases to matter
- Assume one TCP flow will saturate the sum of every ECMP uplink rate
Explanation
Correct Answer
B:Untrusted endpoints can abuse premium queues. User-provided priority tags must not override business policy.
Incorrect Answers
A:Eliminating controls may worsen low-latency traffic service. By contrast, untrusted endpoints can abuse premium queues.
C:Channel width cannot remove physical shadowing. In this situation, untrusted endpoints can abuse premium queues.
D:Hash-based load balancing typically pins a flow to one path. It would not resolve the documented symptom; untrusted endpoints can abuse premium queues.
HPE Network Campus Access Professional (HPE7-A01) Practice Tests