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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 72

Question 710

A policy requires restricted services in a management VRF to reach a shared NTP system but forbids broad connectivity to the production user VRF. 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. Allocate router IDs from a controlled unique registry.
  4. Use a standard transit-address pool with mask validation.

Explanation

Correct Answer

A:

This is a continuing control for the failure mode in which VRF separation blocks required shared services unless an explicit controlled path exists. 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 an OSPF domain has duplicate router IDs after a lab switch image is cloned into production. It would leave the present failure mode insufficiently addressed.

D:

That control is useful for a different failure, such as when a team adds a new L3 transit VLAN but configures the wrong IP mask on one side of the point-to-point link. It would leave the present failure mode insufficiently addressed.

Question 711

A distribution switch learns a specific /24 route and a broader /16 summary; engineers expect the summary to override the specific route. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Keep route metric decisions in a documented traffic engineering plan.
  2. Validate route specificity before implementing summaries or filters.
  3. Require provider-supplied ASN verification before peer activation.
  4. Document per-VRF ownership of routes and permitted route leaking.

Explanation

Correct Answer

B:

This is a continuing control for the failure mode in which forwarding decisions favor the most specific matching destination prefix, not simply the broadest summary. 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 branch has two equally routed core uplinks, but one should be reserved as a backup for high-priority traffic. It would leave the present failure mode insufficiently addressed.

C:

That control is useful for a different failure, such as when a campus BGP peering to an ISP remains Idle because the local neighbor remote-AS setting is incorrect. It would leave the present failure mode insufficiently addressed.

D:

That control is useful for a different failure, such as when a campus routes guest and employee traffic in separate VRFs but a technician adds a guest static route only to the employee VRF. It would leave the present failure mode insufficiently addressed.

Question 712

A campus OSPF redistribution policy accidentally injects a default route from a disconnected guest gateway into the internal core. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Validate address ownership before route aggregation changes.
  2. Allocate router IDs from a controlled unique registry.
  3. Explicitly track static-route retirement in WAN change records.
  4. Require prefix and route-source review for redistribution changes.

Explanation

Correct Answer

D:

This is a continuing control for the failure mode in which an overly broad redistribution policy advertises a default reachability the gateway cannot actually provide. 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.

B:

That control is useful for a different failure, such as when an OSPF domain has duplicate router IDs after a lab switch image is cloned into production. 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 713

A branch has two equally routed core uplinks, but one should be reserved as a backup for high-priority traffic. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Distinguish routed and switched link roles in physical diagrams.
  2. Require both route and policy validation for new application flows.
  3. Include negative traffic tests in every PBR deployment.
  4. Keep route metric decisions in a documented traffic engineering plan.

Explanation

Correct Answer

D:

This is a continuing control for the failure mode in which equal-cost route selection can use both paths when the design expects one standby 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 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 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 uses policy-based routing to force a selected application through a service appliance, but a catch-all policy inadvertently redirects user DNS traffic too. It would leave the present failure mode insufficiently addressed.

Question 714

A device sends packets to a remote IPv6 network, but return traffic fails because the remote router lacks the source-prefix route. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Include MTU symmetry checks in routed-link provisioning.
  2. Record passive and active OSPF interfaces in the routing design.
  3. Test source and destination route visibility from both ends.
  4. Validate route specificity before implementing summaries or filters.

Explanation

Correct Answer

C:

This is a continuing control for the failure mode in which one-way route knowledge is insufficient for a completed IP conversation. 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 adjacency remains in ExStart after a new routed uplink is installed with conflicting MTU settings. It would leave the present failure mode insufficiently addressed.

B:

That control is useful for a different failure, such as when two Aruba CX routers run OSPF on a point-to-point uplink but show no neighbor because one interface is passive. 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 715

A campus BGP peering to an ISP remains Idle because the local neighbor remote-AS setting is incorrect. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Require provider-supplied ASN verification before peer activation.
  2. Review VRF leak prefix filters with every shared-service addition.
  3. Monitor both peer-liveness signals and application reachability during failover tests.
  4. Teach route lookup precedence in troubleshooting runbooks.

Explanation

Correct Answer

A:

This is a continuing control for the failure mode in which BGP session establishment depends on matching peer identity and reachable transport details. 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 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 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.

D:

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.

Question 716

A BGP peer is Established but upstream routes are not accepted due to a prefix filter that rejects the approved campus CIDR. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Stage and review prefix-list changes against known advertisements.
  2. Rehearse route failover with gateway and remote reachability checks.
  3. Keep route metric decisions in a documented traffic engineering plan.
  4. Document per-VRF ownership of routes and permitted route leaking.

Explanation

Correct Answer

A:

This is a continuing control for the failure mode in which a working BGP session can still install no routes when policy filters reject them. 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 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.

C:

That control is useful for a different failure, such as when a branch has two equally routed core uplinks, but one should be reserved as a backup for high-priority traffic. It would leave the present failure mode insufficiently addressed.

D:

That control is useful for a different failure, such as when a campus routes guest and employee traffic in separate VRFs but a technician adds a guest static route only to the employee VRF. It would leave the present failure mode insufficiently addressed.

Question 717

A network team wants to aggregate many campus subnets but summarizes beyond a boundary that includes networks it does not own. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Document OSPF network type and adjacency expectations.
  2. Apply central IPAM checks before approving new subnets.
  3. Validate address ownership before route aggregation changes.
  4. Include negative traffic tests in every PBR deployment.

Explanation

Correct Answer

C:

This is a continuing control for the failure mode in which overbroad aggregation can attract traffic for prefixes without a valid downstream 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 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.

B:

That control is useful for a different failure, such as when a campus advertises overlapping VLAN subnet ranges across two sites, generating unpredictable routing to both. It would leave the present failure mode insufficiently addressed.

D:

That control is useful for a different failure, such as when 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. It would leave the present failure mode insufficiently addressed.

Question 718

A core's next-hop route remains installed during a routed link fault because physical interface status stays up across an intermediate carrier. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Monitor both peer-liveness signals and application reachability during failover tests.
  2. Include MTU symmetry checks in routed-link provisioning.
  3. Require provider-supplied ASN verification before peer activation.
  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 link carrier alone does not prove end-to-end forwarding through intermediate devices. 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 adjacency remains in ExStart after a new routed uplink is installed with conflicting MTU settings. It would leave the present failure mode insufficiently addressed.

C:

That control is useful for a different failure, such as when a campus BGP peering to an ISP remains Idle because the local neighbor remote-AS setting is incorrect. 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 719

An OSPF router has a healthy adjacency but a destination prefix is missing after someone configured a restrictive inbound route filter. Which ongoing operational safeguard best reduces the chance of recurrence?

  1. Review static next-hop reachability after topology changes.
  2. Log prefix-filter changes and validate intended route inventories.
  3. Allocate router IDs from a controlled unique registry.
  4. Test source and destination route visibility from both ends.

Explanation

Correct Answer

B:

This is a continuing control for the failure mode in which a neighbor can exchange control traffic while route acceptance remains policy-constrained. 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 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 domain has duplicate router IDs after a lab switch image is cloned into production. It would leave the present failure mode insufficiently addressed.

D:

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.

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.