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Exam Code: HPE7-A01

Exam Name HPE Network Campus Access Professional

Certification Provider: HP

Corresponding Certification: HPE Aruba Networking Certified Professional - Campus Access

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HP HPE7-A01 Practice Test 90

Question 890

A wireless client can associate to an SSID but never obtains an IPv4 address, while neighboring wired clients obtain DHCP leases. Which first diagnostic check is most useful before changing the network?

  1. Compare client assigned VLAN, DHCP discovery and switch trunk allow list.
  2. Inspect the client radio's supported bands and the AP's enabled SSID bands.
  3. Map BSSID overlap and channel airtime utilization during peak attendance.
  4. Measure RSSI, SNR and noise behind the obstructing wall.

Explanation

Correct Answer

A:

This check collects evidence at the layer implicated by the symptom: association success verifies radio access, not correct DHCP transport into the client subnet. Examine the evidence before choosing the corrective change.

Incorrect Answers

B:

This would be a reasonable check when an office installs a new 6 GHz-capable AP, but an older 802.11ac laptop cannot detect the dedicated 6 GHz-only SSID, but is less direct for the issue at hand: association success verifies radio access, not correct DHCP transport into the client subnet.

C:

This would be a reasonable check when an event venue experiences persistent poor throughput after deploying many extra APs in close proximity on unchanged channels, but is less direct for the issue at hand: association success verifies radio access, not correct DHCP transport into the client subnet.

D:

This would be a reasonable check when a wireless floor gets poor coverage behind dense concrete despite high AP transmit power in the corridor, but is less direct for the issue at hand: association success verifies radio access, not correct DHCP transport into the client subnet.

Question 891

An employee WLAN uses EAP-TLS and clients fail immediately after a RADIUS server certificate renewal. Which first diagnostic check is most useful before changing the network?

  1. Inspect EAP-TLS failure reason and the new server certificate chain.
  2. Inspect beacon captures and applied WLAN profiles across the relevant AP group.
  3. Inspect client supported AKM suites and association failure reasons.
  4. Review channel width, overlap and utilization on neighboring APs.

Explanation

Correct Answer

A:

This check collects evidence at the layer implicated by the symptom: a renewed certificate may fail the client's trust or server-name validation despite valid user identity. Examine the evidence before choosing the corrective change.

Incorrect Answers

B:

This would be a reasonable check when a security team wants to disable a previously unused SSID but the site still broadcasts it through a second WLAN profile, but is less direct for the issue at hand: a renewed certificate may fail the client's trust or server-name validation despite valid user identity.

C:

This would be a reasonable check when a campus is migrating staff to WPA3-Enterprise but several devices only support WPA2-Enterprise, but is less direct for the issue at hand: a renewed certificate may fail the client's trust or server-name validation despite valid user identity.

D:

This would be a reasonable check when a stadium's WLAN uses 80 MHz channels everywhere, producing excessive overlapping BSSs during a sold-out event, but is less direct for the issue at hand: a renewed certificate may fail the client's trust or server-name validation despite valid user identity.

Question 892

A retail site uses multiple AP models but a uniform antenna-gain configuration that overstretches permitted EIRP in some areas. Which first diagnostic check is most useful before changing the network?

  1. Inspect actual RADIUS attributes, assigned role and resulting traffic permissions.
  2. Capture neighbor report requests and responses during a controlled roam.
  3. Trace client IP changes and tunnel or mobility state through a roam.
  4. Inspect AP regulatory settings, antenna gain and configured transmit power.

Explanation

Correct Answer

D:

This check collects evidence at the layer implicated by the symptom: effective radiated power depends on both transmitter setting and antenna gain. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when a wireless role design assumes connecting to the corporate SSID always grants internal network privileges even when a guest certificate authenticates, but is less direct for the issue at hand: effective radiated power depends on both transmitter setting and antenna gain.

B:

This would be a reasonable check when a location-aware application cannot find good roam candidates although coverage overlaps because neighbor information is missing, but is less direct for the issue at hand: effective radiated power depends on both transmitter setting and antenna gain.

C:

This would be a reasonable check when a six-building WLAN uses the same SSID but places client VLANs into different subnets without planning how real-time applications survive moves, but is less direct for the issue at hand: effective radiated power depends on both transmitter setting and antenna gain.

Question 893

A client station repeatedly attempts to join a hidden SSID but technicians attribute its failure solely to low signal. Which first diagnostic check is most useful before changing the network?

  1. Map BSSID overlap and channel airtime utilization during peak attendance.
  2. Capture probe and association exchanges for the failed client.
  3. Review channel width, overlap and utilization on neighboring APs.
  4. Compare uplink RSSI/SNR with client-reported downlink RSSI.

Explanation

Correct Answer

B:

This check collects evidence at the layer implicated by the symptom: a hidden SSID does not eliminate the need for correct association, and hiding alone is not strong access security. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when an event venue experiences persistent poor throughput after deploying many extra APs in close proximity on unchanged channels, but is less direct for the issue at hand: a hidden SSID does not eliminate the need for correct association, and hiding alone is not strong access security.

C:

This would be a reasonable check when a stadium's WLAN uses 80 MHz channels everywhere, producing excessive overlapping BSSs during a sold-out event, but is less direct for the issue at hand: a hidden SSID does not eliminate the need for correct association, and hiding alone is not strong access security.

D:

This would be a reasonable check when a VoIP design attempts to solve poor call quality solely by raising AP power while clients still transmit at weak power levels, but is less direct for the issue at hand: a hidden SSID does not eliminate the need for correct association, and hiding alone is not strong access security.

Question 894

A Wi-Fi 6 AP has 802.11ax clients but an engineer expects OFDMA to increase peak bandwidth of a single long stream automatically. Which first diagnostic check is most useful before changing the network?

  1. Inspect radio mode, client capability and OFDMA usage statistics where supported.
  2. Inspect supported client rates, airtime use and AP retry counters.
  3. Trace client IP changes and tunnel or mobility state through a roam.
  4. Compare target and source AP SSID, AKM and security advertisements.

Explanation

Correct Answer

A:

This check collects evidence at the layer implicated by the symptom: OFDMA improves shared-channel resource use mainly through coordinated multi-user scheduling rather than guaranteed one-stream speedups. Examine the evidence before choosing the corrective change.

Incorrect Answers

B:

This would be a reasonable check when an office has a high-density 2.4 GHz WLAN where many IoT sensors use old low basic rates, consuming excessive airtime, but is less direct for the issue at hand: OFDMA improves shared-channel resource use mainly through coordinated multi-user scheduling rather than guaranteed one-stream speedups.

C:

This would be a reasonable check when a six-building WLAN uses the same SSID but places client VLANs into different subnets without planning how real-time applications survive moves, but is less direct for the issue at hand: OFDMA improves shared-channel resource use mainly through coordinated multi-user scheduling rather than guaranteed one-stream speedups.

D:

This would be a reasonable check when a warehouse handheld disconnects while roaming between APs because its target radios have different SSID security settings, but is less direct for the issue at hand: OFDMA improves shared-channel resource use mainly through coordinated multi-user scheduling rather than guaranteed one-stream speedups.

Question 895

A controller-based WLAN is intended to tunnel client data centrally, but a new AP group forwards it locally due to the wrong forwarding profile. Which first diagnostic check is most useful before changing the network?

  1. Compare client association history, AP power and cell-edge data rates.
  2. Inspect supported client rates, airtime use and AP retry counters.
  3. Inspect client supported AKM suites and association failure reasons.
  4. Trace client packet ingress and tunnel or bridge state on the AP or gateway.

Explanation

Correct Answer

D:

This check collects evidence at the layer implicated by the symptom: aP-group profile inheritance selected local bridging instead of the intended central forwarding behavior. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when the campus WLAN's APs transmit at maximum power, creating very large overlapping cells and sticky client behavior, but is less direct for the issue at hand: aP-group profile inheritance selected local bridging instead of the intended central forwarding behavior.

B:

This would be a reasonable check when an office has a high-density 2.4 GHz WLAN where many IoT sensors use old low basic rates, consuming excessive airtime, but is less direct for the issue at hand: aP-group profile inheritance selected local bridging instead of the intended central forwarding behavior.

C:

This would be a reasonable check when a campus is migrating staff to WPA3-Enterprise but several devices only support WPA2-Enterprise, but is less direct for the issue at hand: aP-group profile inheritance selected local bridging instead of the intended central forwarding behavior.

Question 896

A warehouse WLAN assigns every radio to 5 GHz, leaving legacy scanners that support only 2.4 GHz unable to join. Which first diagnostic check is most useful before changing the network?

  1. Inspect DFS channel events and active regulatory domain settings.
  2. Check the scanner's supported 802.11 bands and AP radio configuration.
  3. Inspect RSN and PMF negotiation in association traces.
  4. Capture probe and association exchanges for the failed client.

Explanation

Correct Answer

B:

This check collects evidence at the layer implicated by the symptom: the scanner cannot associate on a band its Wi-Fi chipset does not support. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when an AP shows DFS radar events and channels change during business hours, interrupting some clients, but is less direct for the issue at hand: the scanner cannot associate on a band its Wi-Fi chipset does not support.

C:

This would be a reasonable check when an engineer disables protected management frames to support one old handheld despite a WLAN security requirement that mandates PMF, but is less direct for the issue at hand: the scanner cannot associate on a band its Wi-Fi chipset does not support.

D:

This would be a reasonable check when a client station repeatedly attempts to join a hidden SSID but technicians attribute its failure solely to low signal, but is less direct for the issue at hand: the scanner cannot associate on a band its Wi-Fi chipset does not support.

Question 897

A video conference room's clients show low RSSI but good signal-to-noise ratio only near the door; the meeting area itself is below the survey target. Which first diagnostic check is most useful before changing the network?

  1. Inspect antenna type and orientation against a measured site map.
  2. Inspect RSN and PMF negotiation in association traces.
  3. Measure RSSI, noise and client throughput at multiple seating positions.
  4. Inspect beacon captures and applied WLAN profiles across the relevant AP group.

Explanation

Correct Answer

C:

This check collects evidence at the layer implicated by the symptom: measurement at an entry point does not establish coverage at the occupied seating locations. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when an AP is installed with a directional antenna pointed into a concrete wall rather than the intended warehouse aisle, but is less direct for the issue at hand: measurement at an entry point does not establish coverage at the occupied seating locations.

B:

This would be a reasonable check when an engineer disables protected management frames to support one old handheld despite a WLAN security requirement that mandates PMF, but is less direct for the issue at hand: measurement at an entry point does not establish coverage at the occupied seating locations.

D:

This would be a reasonable check when a security team wants to disable a previously unused SSID but the site still broadcasts it through a second WLAN profile, but is less direct for the issue at hand: measurement at an entry point does not establish coverage at the occupied seating locations.

Question 898

An event venue experiences persistent poor throughput after deploying many extra APs in close proximity on unchanged channels. Which first diagnostic check is most useful before changing the network?

  1. Map BSSID overlap and channel airtime utilization during peak attendance.
  2. Trace client packet ingress and tunnel or bridge state on the AP or gateway.
  3. Capture neighbor report requests and responses during a controlled roam.
  4. Measure RSSI, SNR and noise behind the obstructing wall.

Explanation

Correct Answer

A:

This check collects evidence at the layer implicated by the symptom: too many overlapping same-channel APs can raise contention and reduce rather than increase capacity. Examine the evidence before choosing the corrective change.

Incorrect Answers

B:

This would be a reasonable check when a controller-based WLAN is intended to tunnel client data centrally, but a new AP group forwards it locally due to the wrong forwarding profile, but is less direct for the issue at hand: too many overlapping same-channel APs can raise contention and reduce rather than increase capacity.

C:

This would be a reasonable check when a location-aware application cannot find good roam candidates although coverage overlaps because neighbor information is missing, but is less direct for the issue at hand: too many overlapping same-channel APs can raise contention and reduce rather than increase capacity.

D:

This would be a reasonable check when a wireless floor gets poor coverage behind dense concrete despite high AP transmit power in the corridor, but is less direct for the issue at hand: too many overlapping same-channel APs can raise contention and reduce rather than increase capacity.

Question 899

A wireless role design assumes connecting to the corporate SSID always grants internal network privileges even when a guest certificate authenticates. Which first diagnostic check is most useful before changing the network?

  1. Inspect AP regulatory settings, antenna gain and configured transmit power.
  2. Inspect actual RADIUS attributes, assigned role and resulting traffic permissions.
  3. Inspect radio mode, client capability and OFDMA usage statistics where supported.
  4. Inspect per-AP airtime, retry and application throughput over peak periods.

Explanation

Correct Answer

B:

This check collects evidence at the layer implicated by the symptom: SSID association and successful authentication do not by themselves authorize privileged network access. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when a retail site uses multiple AP models but a uniform antenna-gain configuration that overstretches permitted EIRP in some areas, but is less direct for the issue at hand: SSID association and successful authentication do not by themselves authorize privileged network access.

C:

This would be a reasonable check when a Wi-Fi 6 AP has 802.11ax clients but an engineer expects OFDMA to increase peak bandwidth of a single long stream automatically, but is less direct for the issue at hand: SSID association and successful authentication do not by themselves authorize privileged network access.

D:

This would be a reasonable check when a deployment reports high AP client counts but users complain about slow uploads during busy classes, but is less direct for the issue at hand: SSID association and successful authentication do not by themselves authorize privileged network access.

Question 900

A warehouse deployment needs accurate client location, but APs were installed with no stable coordinate or floor map assignment. Which first diagnostic check is most useful before changing the network?

  1. Compare uplink RSSI/SNR with client-reported downlink RSSI.
  2. Inspect AP regulatory settings, antenna gain and configured transmit power.
  3. Compare AP map positions with physical survey notes and calibration readings.
  4. Review channel width, overlap and utilization on neighboring APs.

Explanation

Correct Answer

C:

This check collects evidence at the layer implicated by the symptom: client localization depends on accurate reference positions and RF geometry. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when a VoIP design attempts to solve poor call quality solely by raising AP power while clients still transmit at weak power levels, but is less direct for the issue at hand: client localization depends on accurate reference positions and RF geometry.

B:

This would be a reasonable check when a retail site uses multiple AP models but a uniform antenna-gain configuration that overstretches permitted EIRP in some areas, but is less direct for the issue at hand: client localization depends on accurate reference positions and RF geometry.

D:

This would be a reasonable check when a stadium's WLAN uses 80 MHz channels everywhere, producing excessive overlapping BSSs during a sold-out event, but is less direct for the issue at hand: client localization depends on accurate reference positions and RF geometry.