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HP HPE7-A01 Practice Test 86

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.

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?

  1. Correlate voice/video quality with burst counters and per-queue occupancy
  2. Test a live class, bulk stream and ordinary browsing under the revised policy
  3. Measure aggregate throughput, retries and channel utilization after changing width
  4. 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?

  1. Remove all QoS classification so both applications compete without any prioritization
  2. Block all UDP traffic to reduce video usage without distinguishing real-time applications
  3. Disable 2.4 GHz immediately for all devices without checking scanner support
  4. 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?

  1. Tune buffering and priority carefully with application-level measurements
  2. Audit application categories and protect minimum bandwidth for non-voice services
  3. Rebalance queues on a pilot interface and verify other application classes
  4. 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?

  1. Capacity-plan QoS classes for the surviving link and test degraded-path congestion
  2. Refine application/role classification and adjust shaping only for the intended bulk content
  3. Inspect per-port queue drops, microbursts and QoS classification
  4. 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?

  1. Measure interactive latency and backup throughput during representative simultaneous load
  2. Correlate voice/video quality with burst counters and per-queue occupancy
  3. Compare failing client capability against changed WLAN parameters and association logs
  4. 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?

  1. Assume a low five-minute average utilization guarantees zero short-term queue loss
  2. Disable OSPF to reduce application bandwidth use
  3. Disable 2.4 GHz immediately for all devices without checking scanner support
  4. 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?

  1. Size a surviving uplink for the largest critical single-flow demand
  2. Provide a restricted compatible SSID or managed replacement plan
  3. Validate client capability and latency during a phased channel-plan change
  4. 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.

  1. Review antenna placement, multipath and fallback coverage around moving obstructions
  2. Inspect ingress classification and queue selection for marked and unmarked test traffic
  3. Define trust boundaries for DSCP markings and remark untrusted edge traffic
  4. Address interference first and then retest application latency
  5. 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?

  1. Compare failing client capability against changed WLAN parameters and association logs
  2. Measure aggregate throughput, retries and channel utilization after changing width
  3. Compare channel utilization and client connection success before and after rate tuning
  4. 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?

  1. Remove all QoS classification so both applications compete without any prioritization
  2. Accept every client DSCP value as an approved enterprise priority
  3. Set an AP's channel width to maximum and assume metal obstruction ceases to matter
  4. 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

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