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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 24

Question 230

A switch receives BPDUs on an access edge configured with BPDU protection and disables the port. Which failure mechanism best explains the observed behavior?

  1. A fixed next hop does not itself provide gateway availability after its core fails.
  2. Hosts pointing to a physical router address cannot benefit from VRRP gateway movement.
  3. The standby spanning-tree topology is not transitioning to a usable forwarding state.
  4. The edge protection is responding to an unexpected bridge on a user-facing port.

Explanation

Correct Answer

D:

The symptoms fit this mechanism. A targeted response is to remove the unauthorized downstream switch or convert the port to an appropriately protected infrastructure role, followed by verification that the endpoint port remains healthy without permitting a rogue bridging device.

Incorrect Answers

A:

That explanation fits a different case, such as when a site uses a single access-switch uplink to two cores with static routes and expects automatic gateway failover when the first core fails. The symptoms here are better explained by the edge protection is responding to an unexpected bridge on a user-facing port.

B:

That explanation fits a different case, such as when a campus uses VRRP on an SVI but hosts keep targeting a physical gateway address rather than the shared virtual address. The symptoms here are better explained by the edge protection is responding to an unexpected bridge on a user-facing port.

C:

That explanation fits a different case, such as when a distribution ring loses a link and traffic remains blocked despite alternate Layer 2 connectivity. The symptoms here are better explained by the edge protection is responding to an unexpected bridge on a user-facing port.

Question 231

A dual-homed server loses access after one LAG member fails because the remaining link has a mismatched VLAN allow list. Which failure mechanism best explains the observed behavior?

  1. A linear stacking topology leaves a single path to the last member.
  2. Hosts pointing to a physical router address cannot benefit from VRRP gateway movement.
  3. The edge protection is responding to an unexpected bridge on a user-facing port.
  4. The surviving member forwards only a subset of the VLANs required by the server.

Explanation

Correct Answer

D:

The symptoms fit this mechanism. A targeted response is to make VLAN membership consistent across all members of the intended logical aggregation, followed by verification that a single-member failure leaves all required server VLANs reachable.

Incorrect Answers

A:

That explanation fits a different case, such as when a VSF stack has members connected in a line, so one intermember cable failure isolates the last unit. The symptoms here are better explained by the surviving member forwards only a subset of the VLANs required by the server.

B:

That explanation fits a different case, such as when a campus uses VRRP on an SVI but hosts keep targeting a physical gateway address rather than the shared virtual address. The symptoms here are better explained by the surviving member forwards only a subset of the VLANs required by the server.

C:

That explanation fits a different case, such as when a switch receives BPDUs on an access edge configured with BPDU protection and disables the port. The symptoms here are better explained by the surviving member forwards only a subset of the VLANs required by the server.

Question 232

A site uses a single access-switch uplink to two cores with static routes and expects automatic gateway failover when the first core fails. Which failure mechanism best explains the observed behavior?

  1. A fixed next hop does not itself provide gateway availability after its core fails.
  2. VSX keepalive reports peer liveness but does not substitute for the inter-switch data link.
  3. Inconsistent gateway identities create conflicting Layer 2 behavior for the same default gateway.
  4. A physical Layer 2 loop can repeatedly replicate flooded frames and saturate the segment.

Explanation

Correct Answer

A:

The symptoms fit this mechanism. A targeted response is to deploy an approved first-hop redundancy or active-gateway design and validate upstream path failover, followed by verification that client service continues through the backup gateway when either supported core is isolated.

Incorrect Answers

B:

That explanation fits a different case, such as when a VSX pair loses its inter-switch link and the team assumes the remaining keepalive alone carries user traffic between peers. The symptoms here are better explained by a fixed next hop does not itself provide gateway availability after its core fails.

C:

That explanation fits a different case, such as when two VSX peers advertise a default gateway, but client MAC learning oscillates after the peers use inconsistent active-gateway MAC addresses. The symptoms here are better explained by a fixed next hop does not itself provide gateway availability after its core fails.

D:

That explanation fits a different case, such as when an access switch experiences a broadcast storm after a user connects two LAN ports with a patch cable. The symptoms here are better explained by a fixed next hop does not itself provide gateway availability after its core fails.

Question 233

A VSF stack has members connected in a line, so one intermember cable failure isolates the last unit. Which failure mechanism best explains the observed behavior?

  1. An unintended bridge root can steer traffic into a fragile or suboptimal topology.
  2. Control-member version mismatch prevents stable participation in the intended logical stack.
  3. A linear stacking topology leaves a single path to the last member.
  4. OSPF peers in different areas cannot establish a normal shared-segment adjacency.

Explanation

Correct Answer

C:

The symptoms fit this mechanism. A targeted response is to close the designed resilient stacking topology or add the supported alternate intermember link, followed by verification that the stack stays logically operational after a single intermember link outage.

Incorrect Answers

A:

That explanation fits a different case, such as when two redundant switches disagree about the device that should be the STP root for a campus distribution VLAN. The symptoms here are better explained by a linear stacking topology leaves a single path to the last member.

B:

That explanation fits a different case, such as when a stack's standby control member cannot take over after a failover drill because the new member has incompatible firmware. The symptoms here are better explained by a linear stacking topology leaves a single path to the last member.

D:

That explanation fits a different case, such as when a redundant OSPF network has two uplinks, but one interface's routing adjacency never forms because its area ID is wrong. The symptoms here are better explained by a linear stacking topology leaves a single path to the last member.

Question 234

A campus uses VRRP on an SVI but hosts keep targeting a physical gateway address rather than the shared virtual address. Which failure mechanism best explains the observed behavior?

  1. Hosts pointing to a physical router address cannot benefit from VRRP gateway movement.
  2. Redundant hardware can mask a failure unless power-supply status is monitored.
  3. The surviving member forwards only a subset of the VLANs required by the server.
  4. OSPF peers in different areas cannot establish a normal shared-segment adjacency.

Explanation

Correct Answer

A:

The symptoms fit this mechanism. A targeted response is to configure client DHCP gateway or static settings to reference the VRRP virtual IP, followed by verification that after master failure, clients continue using the virtual gateway through the surviving router.

Incorrect Answers

B:

That explanation fits a different case, such as when a core switch keeps forwarding after a power supply is removed, but a maintenance exercise shows no power fault alarm reaches operations. The symptoms here are better explained by hosts pointing to a physical router address cannot benefit from VRRP gateway movement.

C:

That explanation fits a different case, such as when a dual-homed server loses access after one LAG member fails because the remaining link has a mismatched VLAN allow list. The symptoms here are better explained by hosts pointing to a physical router address cannot benefit from VRRP gateway movement.

D:

That explanation fits a different case, such as when a redundant OSPF network has two uplinks, but one interface's routing adjacency never forms because its area ID is wrong. The symptoms here are better explained by hosts pointing to a physical router address cannot benefit from VRRP gateway movement.

Question 235

A redundant OSPF network has two uplinks, but one interface's routing adjacency never forms because its area ID is wrong. Which failure mechanism best explains the observed behavior?

  1. Redundant hardware can mask a failure unless power-supply status is monitored.
  2. OSPF peers in different areas cannot establish a normal shared-segment adjacency.
  3. Ordinary LACP cannot aggregate ports across unrelated switch systems as one partner.
  4. A physical Layer 2 loop can repeatedly replicate flooded frames and saturate the segment.

Explanation

Correct Answer

B:

The symptoms fit this mechanism. A targeted response is to align OSPF area membership and compatible neighbor parameters on the affected link, followed by verification that both expected OSPF neighbors reach Full state and the backup route is installed.

Incorrect Answers

A:

That explanation fits a different case, such as when a core switch keeps forwarding after a power supply is removed, but a maintenance exercise shows no power fault alarm reaches operations. The symptoms here are better explained by OSPF peers in different areas cannot establish a normal shared-segment adjacency.

C:

That explanation fits a different case, such as when an edge switch's LACP bundle connects to two independent devices that are not configured as a VSX or equivalent multichassis domain. The symptoms here are better explained by OSPF peers in different areas cannot establish a normal shared-segment adjacency.

D:

That explanation fits a different case, such as when an access switch experiences a broadcast storm after a user connects two LAN ports with a patch cable. The symptoms here are better explained by OSPF peers in different areas cannot establish a normal shared-segment adjacency.

Question 236

A core switch keeps forwarding after a power supply is removed, but a maintenance exercise shows no power fault alarm reaches operations. Which failure mechanism best explains the observed behavior?

  1. Inconsistent gateway identities create conflicting Layer 2 behavior for the same default gateway.
  2. Ordinary LACP cannot aggregate ports across unrelated switch systems as one partner.
  3. The downstream aggregator declares the shared peer unavailable before the intended recovery completes.
  4. Redundant hardware can mask a failure unless power-supply status is monitored.

Explanation

Correct Answer

D:

The symptoms fit this mechanism. A targeted response is to configure supported environmental telemetry for redundant power modules and test notification delivery, followed by verification that operations receives a meaningful alert when either redundant PSU fails while traffic remains available.

Incorrect Answers

A:

That explanation fits a different case, such as when two VSX peers advertise a default gateway, but client MAC learning oscillates after the peers use inconsistent active-gateway MAC addresses. The symptoms here are better explained by redundant hardware can mask a failure unless power-supply status is monitored.

B:

That explanation fits a different case, such as when an edge switch's LACP bundle connects to two independent devices that are not configured as a VSX or equivalent multichassis domain. The symptoms here are better explained by redundant hardware can mask a failure unless power-supply status is monitored.

C:

That explanation fits a different case, such as when a VSX peer restarts for an upgrade and port-channel traffic drops because the downstream LACP timeout is too strict for the expected convergence. The symptoms here are better explained by redundant hardware can mask a failure unless power-supply status is monitored.

Question 237

A VSX peer restarts for an upgrade and port-channel traffic drops because the downstream LACP timeout is too strict for the expected convergence. Which failure mechanism best explains the observed behavior?

  1. The edge protection is responding to an unexpected bridge on a user-facing port.
  2. The downstream aggregator declares the shared peer unavailable before the intended recovery completes.
  3. Control-member version mismatch prevents stable participation in the intended logical stack.
  4. Inconsistent gateway identities create conflicting Layer 2 behavior for the same default gateway.

Explanation

Correct Answer

B:

The symptoms fit this mechanism. A targeted response is to use supported LACP and VSX recovery timers matched to the failover design and verify them in staged maintenance, followed by verification that planned single-peer maintenance preserves traffic within agreed failover behavior.

Incorrect Answers

A:

That explanation fits a different case, such as when a switch receives BPDUs on an access edge configured with BPDU protection and disables the port. The symptoms here are better explained by the downstream aggregator declares the shared peer unavailable before the intended recovery completes.

C:

That explanation fits a different case, such as when a stack's standby control member cannot take over after a failover drill because the new member has incompatible firmware. The symptoms here are better explained by the downstream aggregator declares the shared peer unavailable before the intended recovery completes.

D:

That explanation fits a different case, such as when two VSX peers advertise a default gateway, but client MAC learning oscillates after the peers use inconsistent active-gateway MAC addresses. The symptoms here are better explained by the downstream aggregator declares the shared peer unavailable before the intended recovery completes.

Question 238

An access switch experiences a broadcast storm after a user connects two LAN ports with a patch cable. Which failure mechanism best explains the observed behavior?

  1. Redundant hardware can mask a failure unless power-supply status is monitored.
  2. A physical Layer 2 loop can repeatedly replicate flooded frames and saturate the segment.
  3. The edge protection is responding to an unexpected bridge on a user-facing port.
  4. A linear stacking topology leaves a single path to the last member.

Explanation

Correct Answer

B:

The symptoms fit this mechanism. A targeted response is to remove the loop and enforce appropriate edge loop protection or spanning-tree safeguards, followed by verification that storm counters stabilize and normal unicast forwarding returns without unintended blocked infrastructure links.

Incorrect Answers

A:

That explanation fits a different case, such as when a core switch keeps forwarding after a power supply is removed, but a maintenance exercise shows no power fault alarm reaches operations. The symptoms here are better explained by a physical Layer 2 loop can repeatedly replicate flooded frames and saturate the segment.

C:

That explanation fits a different case, such as when a switch receives BPDUs on an access edge configured with BPDU protection and disables the port. The symptoms here are better explained by a physical Layer 2 loop can repeatedly replicate flooded frames and saturate the segment.

D:

That explanation fits a different case, such as when a VSF stack has members connected in a line, so one intermember cable failure isolates the last unit. The symptoms here are better explained by a physical Layer 2 loop can repeatedly replicate flooded frames and saturate the segment.

Question 239

Two redundant switches disagree about the device that should be the STP root for a campus distribution VLAN. Which failure mechanism best explains the observed behavior?

  1. The surviving member forwards only a subset of the VLANs required by the server.
  2. An unintended bridge root can steer traffic into a fragile or suboptimal topology.
  3. Hosts pointing to a physical router address cannot benefit from VRRP gateway movement.
  4. Ordinary LACP cannot aggregate ports across unrelated switch systems as one partner.

Explanation

Correct Answer

B:

The symptoms fit this mechanism. A targeted response is to set and verify the intended spanning-tree root priority on the designated distribution devices, followed by verification that the approved switch is root and alternate paths have documented blocking roles.

Incorrect Answers

A:

That explanation fits a different case, such as when a dual-homed server loses access after one LAG member fails because the remaining link has a mismatched VLAN allow list. The symptoms here are better explained by an unintended bridge root can steer traffic into a fragile or suboptimal topology.

C:

That explanation fits a different case, such as when a campus uses VRRP on an SVI but hosts keep targeting a physical gateway address rather than the shared virtual address. The symptoms here are better explained by an unintended bridge root can steer traffic into a fragile or suboptimal topology.

D:

That explanation fits a different case, such as when an edge switch's LACP bundle connects to two independent devices that are not configured as a VSX or equivalent multichassis domain. The symptoms here are better explained by an unintended bridge root can steer traffic into a fragile or suboptimal topology.

Question 240

A stack's standby control member cannot take over after a failover drill because the new member has incompatible firmware. Which failure mechanism best explains the observed behavior?

  1. Hosts pointing to a physical router address cannot benefit from VRRP gateway movement.
  2. Control-member version mismatch prevents stable participation in the intended logical stack.
  3. A linear stacking topology leaves a single path to the last member.
  4. Redundant hardware can mask a failure unless power-supply status is monitored.

Explanation

Correct Answer

B:

The symptoms fit this mechanism. A targeted response is to align software versions through the vendor-supported stack upgrade and member compatibility process, followed by verification that all members join the stack and leadership failover completes without losing the remaining access members.

Incorrect Answers

A:

That explanation fits a different case, such as when a campus uses VRRP on an SVI but hosts keep targeting a physical gateway address rather than the shared virtual address. The symptoms here are better explained by control-member version mismatch prevents stable participation in the intended logical stack.

C:

That explanation fits a different case, such as when a VSF stack has members connected in a line, so one intermember cable failure isolates the last unit. The symptoms here are better explained by control-member version mismatch prevents stable participation in the intended logical stack.

D:

That explanation fits a different case, such as when a core switch keeps forwarding after a power supply is removed, but a maintenance exercise shows no power fault alarm reaches operations. The symptoms here are better explained by control-member version mismatch prevents stable participation in the intended logical stack.