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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 73

Question 720

A campus advertises overlapping VLAN subnet ranges across two sites, generating unpredictable routing to both. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Explicitly track static-route retirement in WAN change records.
  2. Apply central IPAM checks before approving new subnets.
  3. Log prefix-filter changes and validate intended route inventories.
  4. Require both route and policy validation for new application flows.

Explanation

Correct Answer

B:

This is a continuing control for the failure mode in which duplicate destination prefixes prevent unambiguous routed reachability between sites. 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 WAN cutover leaves a static route pointing to an old gateway while the current routing protocol advertises a new next hop. It would leave the present failure mode insufficiently addressed.

C:

That control is useful for a different failure, such as when an OSPF router has a healthy adjacency but a destination prefix is missing after someone configured a restrictive inbound route filter. It would leave the present failure mode insufficiently addressed.

D:

That control is useful for a different failure, such as when an ACL allows a remote application subnet, yet a client cannot access it because the SVI has no route to that destination. It would leave the present failure mode insufficiently addressed.

Question 721

A campus uplink is configured as an unnumbered Layer 3 interface but operators try to troubleshoot it as a tagged L2 trunk. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Distinguish routed and switched link roles in physical diagrams.
  2. Document OSPF network type and adjacency expectations.
  3. Teach route lookup precedence in troubleshooting runbooks.
  4. Log prefix-filter changes and validate intended route inventories.

Explanation

Correct Answer

A:

This is a continuing control for the failure mode in which a routed interface does not automatically behave as a VLAN-bearing access/trunk port. It complements the immediate fix instead of relying on a one-off correction.

Incorrect Answers

B:

That control is useful for a different failure, such as when an OSPF neighbor becomes stuck at 2-Way on a multiaccess broadcast network and the engineer expects every pair of routers to reach Full. It would leave the present failure mode insufficiently addressed.

C:

That control is useful for a different failure, such as when a default route learned from dynamic routing persists despite a better directly connected route for an internal subnet. It would leave the present failure mode insufficiently addressed.

D:

That control is useful for a different failure, such as when an OSPF router has a healthy adjacency but a destination prefix is missing after someone configured a restrictive inbound route filter. It would leave the present failure mode insufficiently addressed.

Question 722

An ACL allows a remote application subnet, yet a client cannot access it because the SVI has no route to that destination. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Review VRF leak prefix filters with every shared-service addition.
  2. Require both route and policy validation for new application flows.
  3. Review static next-hop reachability after topology changes.
  4. Rehearse route failover with gateway and remote reachability checks.

Explanation

Correct Answer

B:

This is a continuing control for the failure mode in which traffic cannot reach an authorized destination without an IP forwarding path. 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 policy requires restricted services in a management VRF to reach a shared NTP system but forbids broad connectivity to the production user VRF. It would leave the present failure mode insufficiently addressed.

C:

That control is useful for a different failure, such as when a distribution switch cannot reach an application subnet because its static route references an incorrect next-hop IP. It would leave the present failure mode insufficiently addressed.

D:

That control is useful for a different failure, such as when a campus core has a default route toward a failed WAN link, while the healthy standby WAN is not preferred. It would leave the present failure mode insufficiently addressed.

Question 723

An OSPF neighbor becomes stuck at 2-Way on a multiaccess broadcast network and the engineer expects every pair of routers to reach Full. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Log prefix-filter changes and validate intended route inventories.
  2. Review static next-hop reachability after topology changes.
  3. Validate area topology before routing changes or new site turnup.
  4. Document OSPF network type and adjacency expectations.

Explanation

Correct Answer

D:

This is a continuing control for the failure mode in which on broadcast segments, DROther peers may remain 2-Way while Full adjacency forms with the DR/BDR. 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 an OSPF router has a healthy adjacency but a destination prefix is missing after someone configured a restrictive inbound route filter. It would leave the present failure mode insufficiently addressed.

B:

That control is useful for a different failure, such as when a distribution switch cannot reach an application subnet because its static route references an incorrect next-hop IP. It would leave the present failure mode insufficiently addressed.

C:

That control is useful for a different failure, such as when an OSPF multi-area design attaches a remote area directly to another remote area without an approved backbone connection or virtual-link design. It would leave the present failure mode insufficiently addressed.

Question 724

A team adds a new L3 transit VLAN but configures the wrong IP mask on one side of the point-to-point link. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Distinguish routed and switched link roles in physical diagrams.
  2. Test source and destination route visibility from both ends.
  3. Explicitly track static-route retirement in WAN change records.
  4. Use a standard transit-address pool with mask validation.

Explanation

Correct Answer

D:

This is a continuing control for the failure mode in which peer interfaces with incompatible on-link subnets cannot reliably establish local next-hop reachability. 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 campus uplink is configured as an unnumbered Layer 3 interface but operators try to troubleshoot it as a tagged L2 trunk. It would leave the present failure mode insufficiently addressed.

B:

That control is useful for a different failure, such as when a device sends packets to a remote IPv6 network, but return traffic fails because the remote router lacks the source-prefix route. It would leave the present failure mode insufficiently addressed.

C:

That control is useful for a different failure, such as when a WAN cutover leaves a static route pointing to an old gateway while the current routing protocol advertises a new next hop. It would leave the present failure mode insufficiently addressed.

Question 725

A campus uses policy-based routing to force a selected application through a service appliance, but a catch-all policy inadvertently redirects user DNS traffic too. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Include negative traffic tests in every PBR deployment.
  2. Require both route and policy validation for new application flows.
  3. Require prefix and route-source review for redistribution changes.
  4. Validate route specificity before implementing summaries or filters.

Explanation

Correct Answer

A:

This is a continuing control for the failure mode in which an overly broad PBR match overrides normal routing for unrelated DNS sessions. It complements the immediate fix instead of relying on a one-off correction.

Incorrect Answers

B:

That control is useful for a different failure, such as when an ACL allows a remote application subnet, yet a client cannot access it because the SVI has no route to that destination. It would leave the present failure mode insufficiently addressed.

C:

That control is useful for a different failure, such as when a campus OSPF redistribution policy accidentally injects a default route from a disconnected guest gateway into the internal core. It would leave the present failure mode insufficiently addressed.

D:

That control is useful for a different failure, such as when a distribution switch learns a specific /24 route and a broader /16 summary; engineers expect the summary to override the specific route. It would leave the present failure mode insufficiently addressed.

Question 726

A default route learned from dynamic routing persists despite a better directly connected route for an internal subnet. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Validate address ownership before route aggregation changes.
  2. Teach route lookup precedence in troubleshooting runbooks.
  3. Document OSPF network type and adjacency expectations.
  4. Review VRF leak prefix filters with every shared-service addition.

Explanation

Correct Answer

B:

This is a continuing control for the failure mode in which a 0/0 default route serves only destinations without a more-specific matching route. 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 network team wants to aggregate many campus subnets but summarizes beyond a boundary that includes networks it does not own. It would leave the present failure mode insufficiently addressed.

C:

That control is useful for a different failure, such as when an OSPF neighbor becomes stuck at 2-Way on a multiaccess broadcast network and the engineer expects every pair of routers to reach Full. It would leave the present failure mode insufficiently addressed.

D:

That control is useful for a different failure, such as when a policy requires restricted services in a management VRF to reach a shared NTP system but forbids broad connectivity to the production user VRF. It would leave the present failure mode insufficiently addressed.

Question 727

A WAN cutover leaves a static route pointing to an old gateway while the current routing protocol advertises a new next hop. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Log prefix-filter changes and validate intended route inventories.
  2. Validate route specificity before implementing summaries or filters.
  3. Review VRF leak prefix filters with every shared-service addition.
  4. Explicitly track static-route retirement in WAN change records.

Explanation

Correct Answer

D:

This is a continuing control for the failure mode in which static-route preference can override the new dynamic route even when the old path is broken. 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 an OSPF router has a healthy adjacency but a destination prefix is missing after someone configured a restrictive inbound route filter. It would leave the present failure mode insufficiently addressed.

B:

That control is useful for a different failure, such as when a distribution switch learns a specific /24 route and a broader /16 summary; engineers expect the summary to override the specific route. It would leave the present failure mode insufficiently addressed.

C:

That control is useful for a different failure, such as when a policy requires restricted services in a management VRF to reach a shared NTP system but forbids broad connectivity to the production user VRF. It would leave the present failure mode insufficiently addressed.

Question 728

A data center's OSPF router and campus peer have matching area IDs but fail adjacency because their hello/dead timers differ. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Rehearse route failover with gateway and remote reachability checks.
  2. Require both route and policy validation for new application flows.
  3. Standardize routing timers within approved network segments.
  4. Monitor both peer-liveness signals and application reachability during failover tests.

Explanation

Correct Answer

C:

This is a continuing control for the failure mode in which OSPF neighboring interfaces require compatible timer parameters to maintain adjacency. 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 campus core has a default route toward a failed WAN link, while the healthy standby WAN is not preferred. It would leave the present failure mode insufficiently addressed.

B:

That control is useful for a different failure, such as when an ACL allows a remote application subnet, yet a client cannot access it because the SVI has no route to that destination. It would leave the present failure mode insufficiently addressed.

D:

That control is useful for a different failure, such as when a core's next-hop route remains installed during a routed link fault because physical interface status stays up across an intermediate carrier. It would leave the present failure mode insufficiently addressed.

Question 729

A company wants enterprise WLAN admission but plans to deploy a shared WPA2 personal passphrase to every employee. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Require unique admin identities, MFA where supported and periodic account review.
  2. Run negative guest-to-staff connectivity checks after WLAN profile changes.
  3. Review certificate or identity lifecycle and per-user revocation processes.
  4. Treat weak device attributes as supporting signals, not sole authorization evidence.

Explanation

Correct Answer

C:

This is a continuing control for the failure mode in which a common PSK does not provide per-identity access decisions or practical individual revocation. 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 facilities vendor uses a shared switch administrator account, and investigators cannot attribute a recent unauthorized configuration change. It would leave the present failure mode insufficiently addressed.

B:

That control is useful for a different failure, such as when a guest SSID is connected to a network that allows lateral traffic into staff database servers. It would leave the present failure mode insufficiently addressed.

D:

That control is useful for a different failure, such as when a printer is allowed into a protected VLAN solely because its hostname matches an approved naming prefix. It would leave the present failure mode insufficiently addressed.

Question 730

A guest SSID is connected to a network that allows lateral traffic into staff database servers. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Review temporary access expiry and scoped permissions automatically.
  2. Review old permit rules when network trust boundaries change.
  3. Test IoT lateral and management-plane restrictions with every new device class.
  4. Run negative guest-to-staff connectivity checks after WLAN profile changes.

Explanation

Correct Answer

D:

This is a continuing control for the failure mode in which the guest role's effective firewall policy permits unintended east-west and internal 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 network engineer opens full access for contractors to troubleshoot one campus printer. It would leave the present failure mode insufficiently addressed.

B:

That control is useful for a different failure, such as when a branch firewall permits internal IoT devices to initiate sessions to the NAC administration console by a legacy broad access rule. It would leave the present failure mode insufficiently addressed.

C:

That control is useful for a different failure, such as when an IoT camera VLAN receives full access to network management interfaces because the firewall default rule is permissive. It would leave the present failure mode insufficiently addressed.