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HP HPE7-A01 Practice Test 55

Question 540

A campus routing team wants faster OSPF failure detection over a fiber interconnect. What is the most appropriate first technical change?

  1. Verify both transit VLAN reachability and consistent OSPF interface settings
  2. Use an appropriate internal BGP path-preference policy and inspect best-path selection
  3. Align the supported interface MTU and review OSPF database exchange diagnostics
  4. Evaluate supported BFD with compatible peer intervals and a controlled change plan

Explanation

Correct Answer

D:

Faster failure notification can reduce convergence latency. The sequence shows actual recovery time rather than a configured timer.

Incorrect Answers

A:

Protocol adjacency requires both Layer 2 transport and compatible routing configuration. It would not resolve the documented symptom; faster failure notification can reduce convergence latency.

B:

Local BGP attributes can steer the campus's own egress preference. By contrast, faster failure notification can reduce convergence latency.

C:

Incompatible MTUs can interrupt database synchronization on some platforms. In this situation, faster failure notification can reduce convergence latency.

Question 541

A campus routing team wants faster OSPF failure detection over a fiber interconnect. Which observation would best verify that the intended behavior is working?

  1. Probe permitted DNS and denied server flows while reviewing imported VRF routes
  2. Measure BFD state, OSPF withdrawal and next-hop replacement during induced loss
  3. Capture RA contents and inspect client default-router entries
  4. Trace a test session in both directions and check the destination route table

Explanation

Correct Answer

B:

The sequence shows actual recovery time rather than a configured timer. Faster failure notification can reduce convergence latency.

Incorrect Answers

A:

Both results confirm correct import scope. By contrast, the sequence shows actual recovery time rather than a configured timer.

C:

The actual messages reveal whether route discovery is succeeding. The relevant technical distinction is that the sequence shows actual recovery time rather than a configured timer.

D:

The missing return entry reveals why clients see timeouts. It would not resolve the documented symptom; the sequence shows actual recovery time rather than a configured timer.

Question 542

A campus routing team wants faster OSPF failure detection over a fiber interconnect. Which belief about the configuration should the team reject?

  1. Assume the staff firewall policy alone prevents every routing mistake after default import
  2. Redistribute every connected VLAN into eBGP to avoid missing a subnet
  3. Set OSPF hello and dead timers to arbitrary very low values without peer coordination
  4. Tune local preference before confirming the BGP TCP session can open

Explanation

Correct Answer

C:

Unsupported aggressive timers can flap healthy adjacencies. Faster failure notification can reduce convergence latency.

Incorrect Answers

A:

A wrong route can still disrupt or misroute permitted traffic. The relevant technical distinction is that unsupported aggressive timers can flap healthy adjacencies.

B:

This can disclose private guest and management networks. Here, however, unsupported aggressive timers can flap healthy adjacencies.

D:

Route attributes matter only after the session exchanges routes. By contrast, unsupported aggressive timers can flap healthy adjacencies.

Question 543

A campus routing team wants faster OSPF failure detection over a fiber interconnect. What should be included in the rollout plan to limit a foreseeable failure?

  1. Verify loss tolerance before enabling aggressive detection on production links
  2. Document resolver dependencies and request owner review of future shared routes
  3. Review all affected gateway route tables before adding another branch
  4. Review overlapping prefixes and preserve rollback if a dependent application remains

Explanation

Correct Answer

A:

BFD settings must not convert transient jitter into route outages. The sequence shows actual recovery time rather than a configured timer.

Incorrect Answers

B:

A minimal import list is easier to audit. The relevant technical distinction is that bFD settings must not convert transient jitter into route outages.

C:

Route completeness should be tested as part of expansion. Here, however, bFD settings must not convert transient jitter into route outages.

D:

A single static exception may still be needed for a legacy service. In this situation, bFD settings must not convert transient jitter into route outages.

Question 544

A BGP campus uses loopback neighbors that remain configured after one transit uplink is replaced. What should the network engineer do to address this requirement?

  1. Correct route import/export rules and preserve the intended default per context
  2. Align the intended area and relevant authentication/hello settings
  3. Verify both transit VLAN reachability and consistent OSPF interface settings
  4. Ensure each loopback has valid underlay reachability and the intended source address

Explanation

Correct Answer

D:

Stable BGP endpoint identity still depends on forwarding routes. A functioning TCP route proves the peering's transport dependency.

Incorrect Answers

A:

Imported defaults can redirect trusted traffic toward a less controlled network. It would not resolve the documented symptom; stable BGP endpoint identity still depends on forwarding routes.

B:

OSPF peers require matching area membership before adjacency. In this situation, stable BGP endpoint identity still depends on forwarding routes.

C:

Protocol adjacency requires both Layer 2 transport and compatible routing configuration. Here, however, stable BGP endpoint identity still depends on forwarding routes.

Question 545

A BGP campus uses loopback neighbors that remain configured after one transit uplink is replaced. What should the team inspect to confirm the result?

  1. Trace an affected route's origin and external LSAs across the redistribution points
  2. Check source address, loopback reachability and established peer state
  3. Inspect both VRF tables and prove a denied guest-management session is blocked
  4. Inspect recursive next hop and the selected kernel forwarding entry

Explanation

Correct Answer

B:

A functioning TCP route proves the peering's transport dependency. Stable BGP endpoint identity still depends on forwarding routes.

Incorrect Answers

A:

Tags and advertising routers identify the feedback path. It would not resolve the documented symptom; a functioning TCP route proves the peering's transport dependency.

C:

Routing isolation must be tested on actual source and destination pairs. In this situation, a functioning TCP route proves the peering's transport dependency.

D:

The lookup reveals why one candidate cannot be used. By contrast, a functioning TCP route proves the peering's transport dependency.

Question 546

A BGP campus uses loopback neighbors that remain configured after one transit uplink is replaced. Which misconception is most likely to obstruct a correct fix?

  1. Assume different VRF names alone prevent all communication after explicit routes are imported
  2. Redistribute every connected VLAN into eBGP to avoid missing a subnet
  3. Tune local preference before confirming the BGP TCP session can open
  4. Assume a loopback address remains reachable even when every physical underlay path fails

Explanation

Correct Answer

D:

Virtual addresses still need physical network connectivity. Stable BGP endpoint identity still depends on forwarding routes.

Incorrect Answers

A:

Route leaking can join otherwise isolated contexts. The relevant technical distinction is that virtual addresses still need physical network connectivity.

B:

This can disclose private guest and management networks. By contrast, virtual addresses still need physical network connectivity.

C:

Route attributes matter only after the session exchanges routes. It would not resolve the documented symptom; virtual addresses still need physical network connectivity.

Question 547

A BGP campus uses loopback neighbors that remain configured after one transit uplink is replaced. What precaution is most important before the change is expanded?

  1. Validate approved prefixes and loop-prevention behavior before enabling new boundaries
  2. Review all affected gateway route tables before adding another branch
  3. Test the secondary underlay and document recursive routing dependencies
  4. Review overlapping prefixes and preserve rollback if a dependent application remains

Explanation

Correct Answer

C:

A failover route should preserve loopback connectivity. A functioning TCP route proves the peering's transport dependency.

Incorrect Answers

A:

A small filter error can affect multiple sites. The relevant technical distinction is that a failover route should preserve loopback connectivity.

B:

Route completeness should be tested as part of expansion. By contrast, a failover route should preserve loopback connectivity.

D:

A single static exception may still be needed for a legacy service. Here, however, a failover route should preserve loopback connectivity.

Question 548

A campus has multiple OSPF exit routers, but an upstream outage leaves a dead default route advertised. Which TWO actions together implement the required change and verify that it works? Choose TWO.

  1. Align the intended area and relevant authentication/hello settings
  2. Test routed packet size after aligning the MTU
  3. Check next-hop resolution, best-path flags and competing route distance
  4. Simulate upstream loss and inspect default LSAs and client traffic on peers
  5. Tie default origination to actual egress reachability or withdraw it during failure

Explanation

Correct Answers

D:

Withdrawal and alternate route selection demonstrate recovery. Protocol advertisement should reflect a working outside path.

E:

Protocol advertisement should reflect a working outside path. Withdrawal and alternate route selection demonstrate recovery.

Incorrect Answers

A:

OSPF peers require matching area membership before adjacency. In this situation, protocol advertisement should reflect a working outside path.

B:

A stable neighbor does not alone guarantee application transport. Here, however, resilient default routing must account for remote failures.

C:

Received control-plane information may not become the installed route. The relevant technical distinction is that protocol advertisement should reflect a working outside path.

Question 549

A campus has multiple OSPF exit routers, but an upstream outage leaves a dead default route advertised. Which check most directly demonstrates the desired network behavior?

  1. Trace a test session in both directions and check the destination route table
  2. Inspect active and candidate routes with their distance and metric
  3. Probe permitted DNS and denied server flows while reviewing imported VRF routes
  4. Simulate upstream loss and inspect default LSAs and client traffic on peers

Explanation

Correct Answer

D:

Withdrawal and alternate route selection demonstrate recovery. Protocol advertisement should reflect a working outside path.

Incorrect Answers

A:

The missing return entry reveals why clients see timeouts. In this situation, withdrawal and alternate route selection demonstrate recovery.

B:

The selected entry shows which preference rule applied. It would not resolve the documented symptom; withdrawal and alternate route selection demonstrate recovery.

C:

Both results confirm correct import scope. Here, however, withdrawal and alternate route selection demonstrate recovery.

Question 550

A campus has multiple OSPF exit routers, but an upstream outage leaves a dead default route advertised. Which assumption would be most misleading when investigating this situation?

  1. Assume an OSPF interface staying up proves the remote internet service is healthy
  2. Assume different VRF names alone prevent all communication after explicit routes are imported
  3. Tune local preference before confirming the BGP TCP session can open
  4. Change BGP local preference to repair OSPF database-description rejection

Explanation

Correct Answer

A:

Local carrier status cannot see farther upstream faults. Protocol advertisement should reflect a working outside path.

Incorrect Answers

B:

Route leaking can join otherwise isolated contexts. By contrast, local carrier status cannot see farther upstream faults.

C:

Route attributes matter only after the session exchanges routes. It would not resolve the documented symptom; local carrier status cannot see farther upstream faults.

D:

BGP attributes are unrelated to OSPF MTU negotiation. In this situation, local carrier status cannot see farther upstream faults.

HPE Network Campus Access Professional (HPE7-A01) Practice Tests

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