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HP HPE7-A01 Bundle

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 81

Question 800

An application experiences 20 ms average latency but bursts to 250 ms during each storage transfer, causing user complaints. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Size AP uplinks against realistic aggregate usage rather than radio-rate labels.
  2. Report p95/p99 latency alongside mean in service-level monitoring.
  3. Review every QoS remarking boundary after routing or security upgrades.
  4. Test slow legacy devices before changing radio minimum rates.

Explanation

Correct Answer

B:

This is a continuing control for the failure mode in which an acceptable mean obscures severe queueing spikes correlated with bulk traffic. It complements the immediate fix instead of relying on a one-off correction.

Incorrect Answers

A:

That control is useful for a different failure, such as when a large class sends video traffic through a 1 Gbps uplink attached to multiple multigigabit APs and the uplink becomes saturated. It would leave the present failure mode insufficiently addressed.

C:

That control is useful for a different failure, such as when a video conferencing application uses DSCP AF41, but a policy rewrites all traffic to best effort at the distribution layer. It would leave the present failure mode insufficiently addressed.

D:

That control is useful for a different failure, such as when a wireless network has high airtime consumption from low legacy data rates despite moderate user counts. It would leave the present failure mode insufficiently addressed.

Question 801

A troubleshooting report calls all wireless frames Ethernet frames and misidentifies the association step as a VLAN function. Which first diagnostic check is most useful before changing the network?

  1. Check host gateways, switch SVI state and routing-table entries.
  2. Inspect a wireless capture alongside an uplink Ethernet capture to identify the relevant frame types.
  3. Inspect a capture to confirm whether media packets use UDP or TCP.
  4. Examine IPv6 neighbor state, prefix advertisements and route entries.

Explanation

Correct Answer

B:

This check collects evidence at the layer implicated by the symptom: the engineer conflated the radio access protocol with wired frame forwarding and VLAN membership. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when an engineer adds a second VLAN for a department but expects its traffic to reach a second subnet with only Layer 2 tagging, but is less direct for the issue at hand: the engineer conflated the radio access protocol with wired frame forwarding and VLAN membership.

C:

This would be a reasonable check when an application team attributes intermittent voice calls to TCP retransmission even though the audio stream uses UDP, but is less direct for the issue at hand: the engineer conflated the radio access protocol with wired frame forwarding and VLAN membership.

D:

This would be a reasonable check when IPv6 endpoints receive router advertisements but cannot contact their application through a dual-stack campus, but is less direct for the issue at hand: the engineer conflated the radio access protocol with wired frame forwarding and VLAN membership.

Question 802

A guest WLAN's 802.1X design is treated as interchangeable with 802.1Q tagging at the distribution switch. Which first diagnostic check is most useful before changing the network?

  1. Inspect a capture to confirm whether media packets use UDP or TCP.
  2. Inspect the TCP stream after the handshake for application errors or resets.
  3. Inspect the client authentication state and allowed VLAN tags on the wired uplink.
  4. Inspect a wireless capture alongside an uplink Ethernet capture to identify the relevant frame types.

Explanation

Correct Answer

C:

This check collects evidence at the layer implicated by the symptom: authentication and VLAN encapsulation were confused despite solving different problems. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when an application team attributes intermittent voice calls to TCP retransmission even though the audio stream uses UDP, but is less direct for the issue at hand: authentication and VLAN encapsulation were confused despite solving different problems.

B:

This would be a reasonable check when a network trace shows a client completing TCP handshakes but the application never returns its expected data, but is less direct for the issue at hand: authentication and VLAN encapsulation were confused despite solving different problems.

D:

This would be a reasonable check when a troubleshooting report calls all wireless frames Ethernet frames and misidentifies the association step as a VLAN function, but is less direct for the issue at hand: authentication and VLAN encapsulation were confused despite solving different problems.

Question 803

An operator assumes a switch will discover a destination IP address from ARP when the target is on another subnet. Which first diagnostic check is most useful before changing the network?

  1. Read link negotiation status and CRC or alignment errors on both switchports.
  2. Examine IPv6 neighbor state, prefix advertisements and route entries.
  3. Inspect a wireless capture alongside an uplink Ethernet capture to identify the relevant frame types.
  4. Compare the route lookup with the neighboring next-hop entry.

Explanation

Correct Answer

D:

This check collects evidence at the layer implicated by the symptom: ARP resolves next-hop link-layer addresses on the local broadcast domain, not a route across subnets. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when an Ethernet uplink has valid optical light but a negotiated speed that differs from the approved switchport design, but is less direct for the issue at hand: ARP resolves next-hop link-layer addresses on the local broadcast domain, not a route across subnets.

B:

This would be a reasonable check when IPv6 endpoints receive router advertisements but cannot contact their application through a dual-stack campus, but is less direct for the issue at hand: ARP resolves next-hop link-layer addresses on the local broadcast domain, not a route across subnets.

C:

This would be a reasonable check when a troubleshooting report calls all wireless frames Ethernet frames and misidentifies the association step as a VLAN function, but is less direct for the issue at hand: ARP resolves next-hop link-layer addresses on the local broadcast domain, not a route across subnets.

Question 804

An application team attributes intermittent voice calls to TCP retransmission even though the audio stream uses UDP. Which first diagnostic check is most useful before changing the network?

  1. Inspect the client authentication state and allowed VLAN tags on the wired uplink.
  2. Inspect the TCP stream after the handshake for application errors or resets.
  3. Inspect a capture to confirm whether media packets use UDP or TCP.
  4. Check host gateways, switch SVI state and routing-table entries.

Explanation

Correct Answer

C:

This check collects evidence at the layer implicated by the symptom: UDP media does not obtain automatic TCP retransmission and in-order recovery from the transport. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when a guest WLAN's 802.1X design is treated as interchangeable with 802.1Q tagging at the distribution switch, but is less direct for the issue at hand: UDP media does not obtain automatic TCP retransmission and in-order recovery from the transport.

B:

This would be a reasonable check when a network trace shows a client completing TCP handshakes but the application never returns its expected data, but is less direct for the issue at hand: UDP media does not obtain automatic TCP retransmission and in-order recovery from the transport.

D:

This would be a reasonable check when an engineer adds a second VLAN for a department but expects its traffic to reach a second subnet with only Layer 2 tagging, but is less direct for the issue at hand: UDP media does not obtain automatic TCP retransmission and in-order recovery from the transport.

Question 805

IPv6 endpoints receive router advertisements but cannot contact their application through a dual-stack campus. Which first diagnostic check is most useful before changing the network?

  1. Inspect the TCP stream after the handshake for application errors or resets.
  2. Read link negotiation status and CRC or alignment errors on both switchports.
  3. Inspect the client authentication state and allowed VLAN tags on the wired uplink.
  4. Examine IPv6 neighbor state, prefix advertisements and route entries.

Explanation

Correct Answer

D:

This check collects evidence at the layer implicated by the symptom: iPv4 success does not demonstrate correct IPv6 routing or security policy. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when a network trace shows a client completing TCP handshakes but the application never returns its expected data, but is less direct for the issue at hand: iPv4 success does not demonstrate correct IPv6 routing or security policy.

B:

This would be a reasonable check when an Ethernet uplink has valid optical light but a negotiated speed that differs from the approved switchport design, but is less direct for the issue at hand: iPv4 success does not demonstrate correct IPv6 routing or security policy.

C:

This would be a reasonable check when a guest WLAN's 802.1X design is treated as interchangeable with 802.1Q tagging at the distribution switch, but is less direct for the issue at hand: iPv4 success does not demonstrate correct IPv6 routing or security policy.

Question 806

An Ethernet uplink has valid optical light but a negotiated speed that differs from the approved switchport design. Which first diagnostic check is most useful before changing the network?

  1. Inspect a capture to confirm whether media packets use UDP or TCP.
  2. Check host gateways, switch SVI state and routing-table entries.
  3. Compare the route lookup with the neighboring next-hop entry.
  4. Read link negotiation status and CRC or alignment errors on both switchports.

Explanation

Correct Answer

D:

This check collects evidence at the layer implicated by the symptom: a physical link may come up with a negotiated mode that does not satisfy the performance design. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when an application team attributes intermittent voice calls to TCP retransmission even though the audio stream uses UDP, but is less direct for the issue at hand: a physical link may come up with a negotiated mode that does not satisfy the performance design.

B:

This would be a reasonable check when an engineer adds a second VLAN for a department but expects its traffic to reach a second subnet with only Layer 2 tagging, but is less direct for the issue at hand: a physical link may come up with a negotiated mode that does not satisfy the performance design.

C:

This would be a reasonable check when an operator assumes a switch will discover a destination IP address from ARP when the target is on another subnet, but is less direct for the issue at hand: a physical link may come up with a negotiated mode that does not satisfy the performance design.

Question 807

An engineer adds a second VLAN for a department but expects its traffic to reach a second subnet with only Layer 2 tagging. Which first diagnostic check is most useful before changing the network?

  1. Inspect a wireless capture alongside an uplink Ethernet capture to identify the relevant frame types.
  2. Examine IPv6 neighbor state, prefix advertisements and route entries.
  3. Compare the route lookup with the neighboring next-hop entry.
  4. Check host gateways, switch SVI state and routing-table entries.

Explanation

Correct Answer

D:

This check collects evidence at the layer implicated by the symptom: 802.1Q segregates broadcast domains but does not itself route packets between subnets. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when a troubleshooting report calls all wireless frames Ethernet frames and misidentifies the association step as a VLAN function, but is less direct for the issue at hand: 802.1Q segregates broadcast domains but does not itself route packets between subnets.

B:

This would be a reasonable check when IPv6 endpoints receive router advertisements but cannot contact their application through a dual-stack campus, but is less direct for the issue at hand: 802.1Q segregates broadcast domains but does not itself route packets between subnets.

C:

This would be a reasonable check when an operator assumes a switch will discover a destination IP address from ARP when the target is on another subnet, but is less direct for the issue at hand: 802.1Q segregates broadcast domains but does not itself route packets between subnets.

Question 808

A network trace shows a client completing TCP handshakes but the application never returns its expected data. Which first diagnostic check is most useful before changing the network?

  1. Compare the route lookup with the neighboring next-hop entry.
  2. Examine IPv6 neighbor state, prefix advertisements and route entries.
  3. Inspect the client authentication state and allowed VLAN tags on the wired uplink.
  4. Inspect the TCP stream after the handshake for application errors or resets.

Explanation

Correct Answer

D:

This check collects evidence at the layer implicated by the symptom: transport reachability establishes a session but does not prove application authorization or successful processing. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when an operator assumes a switch will discover a destination IP address from ARP when the target is on another subnet, but is less direct for the issue at hand: transport reachability establishes a session but does not prove application authorization or successful processing.

B:

This would be a reasonable check when IPv6 endpoints receive router advertisements but cannot contact their application through a dual-stack campus, but is less direct for the issue at hand: transport reachability establishes a session but does not prove application authorization or successful processing.

C:

This would be a reasonable check when a guest WLAN's 802.1X design is treated as interchangeable with 802.1Q tagging at the distribution switch, but is less direct for the issue at hand: transport reachability establishes a session but does not prove application authorization or successful processing.

Question 809

A new branch switch powers on but remains absent from Central after its management VLAN is provisioned. Which first diagnostic check is most useful before changing the network?

  1. Inspect per-port power negotiation and chassis PoE consumption.
  2. Inspect trap source-interface selection and route lookup in that VRF.
  3. Test gateway, DNS and outbound reachability from the switch management context.
  4. Compare the claimed device serial with its assigned tenant and group.

Explanation

Correct Answer

C:

This check collects evidence at the layer implicated by the symptom: the management plane cannot reach cloud onboarding services over its selected network path. Examine the evidence before choosing the corrective change.

Incorrect Answers

A:

This would be a reasonable check when an access stack stops powering some APs after a larger radio model is deployed on the same ports, but is less direct for the issue at hand: the management plane cannot reach cloud onboarding services over its selected network path.

B:

This would be a reasonable check when a campus switch forwards IPv4 client traffic but cannot send SNMP traps to a server because the trap destination is reachable only through another VRF, but is less direct for the issue at hand: the management plane cannot reach cloud onboarding services over its selected network path.

D:

This would be a reasonable check when a newly added downstream stack is reachable by ping but cannot complete Central group onboarding because it appears under the wrong tenant, but is less direct for the issue at hand: the management plane cannot reach cloud onboarding services over its selected network path.

Question 810

A floor switch connects APs but the uplink passes only the native VLAN while employee and voice SSIDs use tagged VLANs. Which first diagnostic check is most useful before changing the network?

  1. Inspect VLAN membership and trunk allow lists on both uplink peers.
  2. Inspect LACP actor and partner states, keys and member flags.
  3. Compare routes and source addresses in the default and management VRFs.
  4. Test gateway, DNS and outbound reachability from the switch management context.

Explanation

Correct Answer

A:

This check collects evidence at the layer implicated by the symptom: the trunk's allowed-VLAN list excludes the tagged client networks. Examine the evidence before choosing the corrective change.

Incorrect Answers

B:

This would be a reasonable check when an LACP bundle has four member links, but only two forward because the partner uses a different aggregation key, but is less direct for the issue at hand: the trunk's allowed-VLAN list excludes the tagged client networks.

C:

This would be a reasonable check when a floor switch responds on the out-of-band management port, but traffic sourced from its default VRF cannot reach the telemetry server, but is less direct for the issue at hand: the trunk's allowed-VLAN list excludes the tagged client networks.

D:

This would be a reasonable check when a new branch switch powers on but remains absent from Central after its management VLAN is provisioned, but is less direct for the issue at hand: the trunk's allowed-VLAN list excludes the tagged client networks.