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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 33

Question 320

A campus advertises overlapping VLAN subnet ranges across two sites, generating unpredictable routing to both. Which failure mechanism best explains the observed behavior?

  1. Peer interfaces with incompatible on-link subnets cannot reliably establish local next-hop reachability.
  2. A 0/0 default route serves only destinations without a more-specific matching route.
  3. Duplicate destination prefixes prevent unambiguous routed reachability between sites.
  4. BGP session establishment depends on matching peer identity and reachable transport details.

Explanation

Correct Answer

C:

The symptoms fit this mechanism. A targeted response is to renumber or resegment overlapping prefixes or establish an explicitly designed translation boundary, followed by verification that each site has unique routes, and permitted inter-site flows reach the intended endpoints.

Incorrect Answers

A:

That explanation fits a different case, 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. The symptoms here are better explained by duplicate destination prefixes prevent unambiguous routed reachability between sites.

B:

That explanation fits a different case, such as when a default route learned from dynamic routing persists despite a better directly connected route for an internal subnet. The symptoms here are better explained by duplicate destination prefixes prevent unambiguous routed reachability between sites.

D:

That explanation fits a different case, such as when a campus BGP peering to an ISP remains Idle because the local neighbor remote-AS setting is incorrect. The symptoms here are better explained by duplicate destination prefixes prevent unambiguous routed reachability between sites.

Question 321

A campus uplink is configured as an unnumbered Layer 3 interface but operators try to troubleshoot it as a tagged L2 trunk. Which failure mechanism best explains the observed behavior?

  1. A routed interface does not automatically behave as a VLAN-bearing access/trunk port.
  2. A 0/0 default route serves only destinations without a more-specific matching route.
  3. Duplicate destination prefixes prevent unambiguous routed reachability between sites.
  4. The forwarding table sends application packets toward a nonexistent or wrong neighbor.

Explanation

Correct Answer

A:

The symptoms fit this mechanism. A targeted response is to inspect the routed-port configuration and establish the required L3 neighbor and routing exchange, followed by verification that the point-to-point IP adjacency and expected routes work without unnecessary VLAN tagging.

Incorrect Answers

B:

That explanation fits a different case, such as when a default route learned from dynamic routing persists despite a better directly connected route for an internal subnet. The symptoms here are better explained by a routed interface does not automatically behave as a VLAN-bearing access/trunk port.

C:

That explanation fits a different case, such as when a campus advertises overlapping VLAN subnet ranges across two sites, generating unpredictable routing to both. The symptoms here are better explained by a routed interface does not automatically behave as a VLAN-bearing access/trunk port.

D:

That explanation fits a different case, such as when a distribution switch cannot reach an application subnet because its static route references an incorrect next-hop IP. The symptoms here are better explained by a routed interface does not automatically behave as a VLAN-bearing access/trunk port.

Question 322

An ACL allows a remote application subnet, yet a client cannot access it because the SVI has no route to that destination. Which failure mechanism best explains the observed behavior?

  1. A 0/0 default route serves only destinations without a more-specific matching route.
  2. OSPF uses router IDs to distinguish routing speakers; duplication can corrupt peer state.
  3. Traffic cannot reach an authorized destination without an IP forwarding path.
  4. Peer interfaces with incompatible on-link subnets cannot reliably establish local next-hop reachability.

Explanation

Correct Answer

C:

The symptoms fit this mechanism. A targeted response is to restore the appropriate route before making speculative changes to permit ACLs, followed by verification that the destination is reachable through the specified next hop while access restrictions remain.

Incorrect Answers

A:

That explanation fits a different case, such as when a default route learned from dynamic routing persists despite a better directly connected route for an internal subnet. The symptoms here are better explained by traffic cannot reach an authorized destination without an IP forwarding path.

B:

That explanation fits a different case, such as when an OSPF domain has duplicate router IDs after a lab switch image is cloned into production. The symptoms here are better explained by traffic cannot reach an authorized destination without an IP forwarding path.

D:

That explanation fits a different case, 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. The symptoms here are better explained by traffic cannot reach an authorized destination without an IP forwarding path.

Question 323

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 failure mechanism best explains the observed behavior?

  1. Link carrier alone does not prove end-to-end forwarding through intermediate devices.
  2. On broadcast segments, DROther peers may remain 2-Way while Full adjacency forms with the DR/BDR.
  3. VRF separation blocks required shared services unless an explicit controlled path exists.
  4. A working BGP session can still install no routes when policy filters reject them.

Explanation

Correct Answer

B:

The symptoms fit this mechanism. A targeted response is to check the DR/BDR election and determine whether 2-Way is normal for the non-DR peer relationship, followed by verification that the neighbor topology matches designated-router roles and routes are exchanged correctly.

Incorrect Answers

A:

That explanation fits a different case, 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. The symptoms here are better explained by on broadcast segments, DROther peers may remain 2-Way while Full adjacency forms with the DR/BDR.

C:

That explanation fits a different case, 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. The symptoms here are better explained by on broadcast segments, DROther peers may remain 2-Way while Full adjacency forms with the DR/BDR.

D:

That explanation fits a different case, such as when a BGP peer is Established but upstream routes are not accepted due to a prefix filter that rejects the approved campus CIDR. The symptoms here are better explained by on broadcast segments, DROther peers may remain 2-Way while Full adjacency forms with the DR/BDR.

Question 324

A team adds a new L3 transit VLAN but configures the wrong IP mask on one side of the point-to-point link. Which failure mechanism best explains the observed behavior?

  1. Duplicate destination prefixes prevent unambiguous routed reachability between sites.
  2. Peer interfaces with incompatible on-link subnets cannot reliably establish local next-hop reachability.
  3. An overly broad PBR match overrides normal routing for unrelated DNS sessions.
  4. Each VRF has an independent forwarding table and unrelated routes are not automatically shared.

Explanation

Correct Answer

B:

The symptoms fit this mechanism. A targeted response is to align a consistent supported transit prefix and check adjacency reachability, followed by verification that the two routed peers ping each other in the transit VRF and form expected neighbor state.

Incorrect Answers

A:

That explanation fits a different case, such as when a campus advertises overlapping VLAN subnet ranges across two sites, generating unpredictable routing to both. The symptoms here are better explained by peer interfaces with incompatible on-link subnets cannot reliably establish local next-hop reachability.

C:

That explanation fits a different case, 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. The symptoms here are better explained by peer interfaces with incompatible on-link subnets cannot reliably establish local next-hop reachability.

D:

That explanation fits a different case, 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. The symptoms here are better explained by peer interfaces with incompatible on-link subnets cannot reliably establish local next-hop reachability.

Question 325

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 failure mechanism best explains the observed behavior?

  1. An overly broad PBR match overrides normal routing for unrelated DNS sessions.
  2. VRF separation blocks required shared services unless an explicit controlled path exists.
  3. On broadcast segments, DROther peers may remain 2-Way while Full adjacency forms with the DR/BDR.
  4. A passive OSPF interface advertises its network but does not send hello packets to form a neighbor.

Explanation

Correct Answer

A:

The symptoms fit this mechanism. A targeted response is to narrow the route policy match to the approved source, destination and traffic classification, followed by verification that the target application uses the appliance path while DNS follows its ordinary permitted route.

Incorrect Answers

B:

That explanation fits a different case, 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. The symptoms here are better explained by an overly broad PBR match overrides normal routing for unrelated DNS sessions.

C:

That explanation fits a different case, 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. The symptoms here are better explained by an overly broad PBR match overrides normal routing for unrelated DNS sessions.

D:

That explanation fits a different case, such as when two Aruba CX routers run OSPF on a point-to-point uplink but show no neighbor because one interface is passive. The symptoms here are better explained by an overly broad PBR match overrides normal routing for unrelated DNS sessions.

Question 326

A default route learned from dynamic routing persists despite a better directly connected route for an internal subnet. Which failure mechanism best explains the observed behavior?

  1. Duplicate destination prefixes prevent unambiguous routed reachability between sites.
  2. On broadcast segments, DROther peers may remain 2-Way while Full adjacency forms with the DR/BDR.
  3. OSPF database exchange can fail when peers disagree on interface MTU.
  4. A 0/0 default route serves only destinations without a more-specific matching route.

Explanation

Correct Answer

D:

The symptoms fit this mechanism. A targeted response is to verify longest-prefix matching before changing administrative distances or the default route, followed by verification that internal subnet traffic follows the directly connected prefix and external traffic uses default routing.

Incorrect Answers

A:

That explanation fits a different case, such as when a campus advertises overlapping VLAN subnet ranges across two sites, generating unpredictable routing to both. The symptoms here are better explained by a 0/0 default route serves only destinations without a more-specific matching route.

B:

That explanation fits a different case, 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. The symptoms here are better explained by a 0/0 default route serves only destinations without a more-specific matching route.

C:

That explanation fits a different case, such as when an OSPF adjacency remains in ExStart after a new routed uplink is installed with conflicting MTU settings. The symptoms here are better explained by a 0/0 default route serves only destinations without a more-specific matching route.

Question 327

A WAN cutover leaves a static route pointing to an old gateway while the current routing protocol advertises a new next hop. Which failure mechanism best explains the observed behavior?

  1. An overly broad PBR match overrides normal routing for unrelated DNS sessions.
  2. VRF separation blocks required shared services unless an explicit controlled path exists.
  3. Static-route preference can override the new dynamic route even when the old path is broken.
  4. Peer interfaces with incompatible on-link subnets cannot reliably establish local next-hop reachability.

Explanation

Correct Answer

C:

The symptoms fit this mechanism. A targeted response is to withdraw the obsolete static route or correct its administrative distance based on the cutover plan, followed by verification that traffic uses the intended new routed path and the obsolete gateway is absent from active routes.

Incorrect Answers

A:

That explanation fits a different case, 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. The symptoms here are better explained by static-route preference can override the new dynamic route even when the old path is broken.

B:

That explanation fits a different case, 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. The symptoms here are better explained by static-route preference can override the new dynamic route even when the old path is broken.

D:

That explanation fits a different case, 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. The symptoms here are better explained by static-route preference can override the new dynamic route even when the old path is broken.

Question 328

A data center's OSPF router and campus peer have matching area IDs but fail adjacency because their hello/dead timers differ. Which failure mechanism best explains the observed behavior?

  1. A routed interface does not automatically behave as a VLAN-bearing access/trunk port.
  2. Static-route preference can override the new dynamic route even when the old path is broken.
  3. A neighbor can exchange control traffic while route acceptance remains policy-constrained.
  4. OSPF neighboring interfaces require compatible timer parameters to maintain adjacency.

Explanation

Correct Answer

D:

The symptoms fit this mechanism. A targeted response is to align compatible OSPF hello and dead timers at the routed link endpoints, followed by verification that the peers exchange hellos and reach Full with agreed timers.

Incorrect Answers

A:

That explanation fits a different case, 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. The symptoms here are better explained by OSPF neighboring interfaces require compatible timer parameters to maintain adjacency.

B:

That explanation fits a different case, 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. The symptoms here are better explained by OSPF neighboring interfaces require compatible timer parameters to maintain adjacency.

C:

That explanation fits a different case, such as when an OSPF router has a healthy adjacency but a destination prefix is missing after someone configured a restrictive inbound route filter. The symptoms here are better explained by OSPF neighboring interfaces require compatible timer parameters to maintain adjacency.

Question 329

A company wants enterprise WLAN admission but plans to deploy a shared WPA2 personal passphrase to every employee. Which failure mechanism best explains the observed behavior?

  1. A common PSK does not provide per-identity access decisions or practical individual revocation.
  2. Strong WLAN encryption does not prevent credential leakage to a rogue RADIUS server when clients ignore server certificates.
  3. The certificate identity check fails before users can safely trust the HTTPS portal.
  4. Historic wide access rules create a direct path from low-trust endpoints to sensitive control planes.

Explanation

Correct Answer

A:

The symptoms fit this mechanism. A targeted response is to use 802.1X enterprise authentication with a supported central AAA policy and individual or device credentials, followed by verification that a departing user is denied without requiring a shared password change for all staff.

Incorrect Answers

B:

That explanation fits a different case, such as when a wireless team enables WPA3-Enterprise on a protected SSID, but users are allowed to ignore certificate-validation failures in their supplicant profiles. The symptoms here are better explained by a common PSK does not provide per-identity access decisions or practical individual revocation.

C:

That explanation fits a different case, such as when a guest web portal redirects successfully but browsers report that its TLS certificate does not match the portal hostname. The symptoms here are better explained by a common PSK does not provide per-identity access decisions or practical individual revocation.

D:

That explanation fits a different case, such as when a branch firewall permits internal IoT devices to initiate sessions to the NAC administration console by a legacy broad access rule. The symptoms here are better explained by a common PSK does not provide per-identity access decisions or practical individual revocation.

Question 330

A guest SSID is connected to a network that allows lateral traffic into staff database servers. Which failure mechanism best explains the observed behavior?

  1. A shared account hides which individual initiated a high-risk management operation.
  2. Community-string-based access lacks the per-user authenticated privacy required by the policy.
  3. The guest role's effective firewall policy permits unintended east-west and internal traffic.
  4. The certificate identity check fails before users can safely trust the HTTPS portal.

Explanation

Correct Answer

C:

The symptoms fit this mechanism. A targeted response is to apply a narrow guest access policy that blocks internal protected prefixes and permits only approved guest services, followed by verification that guests can access permitted internet destinations while protected networks remain unreachable.

Incorrect Answers

A:

That explanation fits a different case, such as when a facilities vendor uses a shared switch administrator account, and investigators cannot attribute a recent unauthorized configuration change. The symptoms here are better explained by the guest role's effective firewall policy permits unintended east-west and internal traffic.

B:

That explanation fits a different case, such as when a campus exposes SNMPv2 community strings over a shared operations network despite a requirement for authenticated encrypted monitoring. The symptoms here are better explained by the guest role's effective firewall policy permits unintended east-west and internal traffic.

D:

That explanation fits a different case, such as when a guest web portal redirects successfully but browsers report that its TLS certificate does not match the portal hostname. The symptoms here are better explained by the guest role's effective firewall policy permits unintended east-west and internal traffic.