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HP HPE7-A01 Practice Test 49

Question 480

A campus uses redundant OSPF paths but traffic takes a slower WAN despite a better fiber circuit. What is the most appropriate first technical change?

  1. Set appropriate interface costs based on documented path preference
  2. Advertise a conditional or monitored default route using a supported mechanism
  3. Verify both transit VLAN reachability and consistent OSPF interface settings
  4. Align the supported interface MTU and review OSPF database exchange diagnostics

Explanation

Correct Answer

A:

OSPF best-path selection responds to cumulative metric rather than raw physical label. The route table verifies that the intended path wins.

Incorrect Answers

B:

The default should not persist when the upstream exit is unavailable. By contrast, oSPF best-path selection responds to cumulative metric rather than raw physical label.

C:

Protocol adjacency requires both Layer 2 transport and compatible routing configuration. It would not resolve the documented symptom; oSPF best-path selection responds to cumulative metric rather than raw physical label.

D:

Incompatible MTUs can interrupt database synchronization on some platforms. In this situation, oSPF best-path selection responds to cumulative metric rather than raw physical label.

Question 481

A campus uses redundant OSPF paths but traffic takes a slower WAN despite a better fiber circuit. Which observation would best verify that the intended behavior is working?

  1. Trace a test session in both directions and check the destination route table
  2. Compare OSPF path costs and the installed next hop for a representative prefix
  3. Inspect both VRF tables and prove a denied guest-management session is blocked
  4. Capture RA contents and inspect client default-router entries

Explanation

Correct Answer

B:

The route table verifies that the intended path wins. OSPF best-path selection responds to cumulative metric rather than raw physical label.

Incorrect Answers

A:

The missing return entry reveals why clients see timeouts. It would not resolve the documented symptom; the route table verifies that the intended path wins.

C:

Routing isolation must be tested on actual source and destination pairs. By contrast, the route table verifies that the intended path wins.

D:

The actual messages reveal whether route discovery is succeeding. The relevant technical distinction is that the route table verifies that the intended path wins.

Question 482

A campus uses redundant OSPF paths but traffic takes a slower WAN despite a better fiber circuit. Which belief about the configuration should the team reject?

  1. Tune local preference before confirming the BGP TCP session can open
  2. Redistribute every connected VLAN into eBGP to avoid missing a subnet
  3. Assume every received BGP prefix becomes an active next hop immediately
  4. Change LACP hashing and assume OSPF cost automatically follows new bandwidth

Explanation

Correct Answer

D:

Bundle settings do not necessarily update the intended routing metric. OSPF best-path selection responds to cumulative metric rather than raw physical label.

Incorrect Answers

A:

Route attributes matter only after the session exchanges routes. Here, however, bundle settings do not necessarily update the intended routing metric.

B:

This can disclose private guest and management networks. By contrast, bundle settings do not necessarily update the intended routing metric.

C:

Route policy and eligibility can leave alternatives uninstalled. The relevant technical distinction is that bundle settings do not necessarily update the intended routing metric.

Question 483

A campus uses redundant OSPF paths but traffic takes a slower WAN despite a better fiber circuit. What should be included in the rollout plan to limit a foreseeable failure?

  1. Test backup route selection when the preferred fiber path is removed
  2. Capacity-plan for hash skew and a full single-link failure
  3. Block unauthorized RAs on access ports while preserving the approved router
  4. Document which source is authoritative before changing distance globally

Explanation

Correct Answer

A:

Cost tuning must preserve resilience. The route table verifies that the intended path wins.

Incorrect Answers

B:

Effective redundancy requires enough surviving bandwidth. In this situation, cost tuning must preserve resilience.

C:

Dual-stack networks need control of rogue IPv6 gateways. The relevant technical distinction is that cost tuning must preserve resilience.

D:

A blanket change can redirect many unrelated prefixes. Here, however, cost tuning must preserve resilience.

Question 484

A router receives two equal-length prefixes from different routing protocols and the wrong protocol wins. What should the network engineer do to address this requirement?

  1. Remove or adjust the stale more-specific route after verifying the migration plan
  2. Review administrative distance and route preference while preserving required policy
  3. Check next-hop resolution, best-path flags and competing route distance
  4. Align the supported interface MTU and review OSPF database exchange diagnostics

Explanation

Correct Answer

B:

Different routing sources can compete for the same destination prefix. The selected entry shows which preference rule applied.

Incorrect Answers

A:

Longest-prefix match can keep sending traffic to the old router. It would not resolve the documented symptom; different routing sources can compete for the same destination prefix.

C:

Received control-plane information may not become the installed route. In this situation, different routing sources can compete for the same destination prefix.

D:

Incompatible MTUs can interrupt database synchronization on some platforms. Here, however, different routing sources can compete for the same destination prefix.

Question 485

A router receives two equal-length prefixes from different routing protocols and the wrong protocol wins. What should the team inspect to confirm the result?

  1. Trace a test session in both directions and check the destination route table
  2. Compare multiple traffic flows and next-hop byte counters during the same period
  3. Induce upstream loss and verify the failed route is withdrawn and backup installed
  4. Inspect active and candidate routes with their distance and metric

Explanation

Correct Answer

D:

The selected entry shows which preference rule applied. Different routing sources can compete for the same destination prefix.

Incorrect Answers

A:

The missing return entry reveals why clients see timeouts. By contrast, the selected entry shows which preference rule applied.

B:

Flow-level evidence explains imbalance better than one speed test. In this situation, the selected entry shows which preference rule applied.

C:

A controlled fault demonstrates correct preference change. It would not resolve the documented symptom; the selected entry shows which preference rule applied.

Question 486

A router receives two equal-length prefixes from different routing protocols and the wrong protocol wins. Which misconception is most likely to obstruct a correct fix?

  1. Assume OSPF always wins over every static route regardless of configured distance
  2. Set local preference internally and assume it is advertised to every outside provider
  3. Redistribute every connected VLAN into eBGP to avoid missing a subnet
  4. Assume AS-path prepending on advertisements solely controls the campus's own outbound path

Explanation

Correct Answer

A:

Lower-distance static routes may remain preferred. Different routing sources can compete for the same destination prefix.

Incorrect Answers

B:

Local preference is not a universal eBGP inbound steering mechanism. By contrast, lower-distance static routes may remain preferred.

C:

This can disclose private guest and management networks. It would not resolve the documented symptom; lower-distance static routes may remain preferred.

D:

Prepending generally influences other networks' inbound decisions. The relevant technical distinction is that lower-distance static routes may remain preferred.

Question 487

A router receives two equal-length prefixes from different routing protocols and the wrong protocol wins. What precaution is most important before the change is expanded?

  1. Test failure of the preferred carrier and verify the alternate route takes over
  2. Specify probe targets and alerting that represent actual business egress
  3. Capacity-plan for hash skew and a full single-link failure
  4. Document which source is authoritative before changing distance globally

Explanation

Correct Answer

D:

A blanket change can redirect many unrelated prefixes. The selected entry shows which preference rule applied.

Incorrect Answers

A:

A preference policy should not eliminate internet resilience. By contrast, a blanket change can redirect many unrelated prefixes.

B:

Bad probes can falsely mark a healthy default unavailable. The relevant technical distinction is that a blanket change can redirect many unrelated prefixes.

C:

Effective redundancy requires enough surviving bandwidth. Here, however, a blanket change can redirect many unrelated prefixes.

Question 488

A branch uses a more specific static route through an old tunnel after the site migrates to new dynamic routing. Which configuration decision most directly resolves the situation?

  1. Enable appropriate inter-VLAN routing and permit only the intended Layer 3 access
  2. Ensure each loopback has valid underlay reachability and the intended source address
  3. Review administrative distance and route preference while preserving required policy
  4. Remove or update the stale narrow route so the intended route can win

Explanation

Correct Answer

D:

Longest-prefix match can override a broader learned route. A narrow static path can win despite higher-level protocol preferences.

Incorrect Answers

A:

Different subnets need a routed path and authorized policy for communication. In this situation, longest-prefix match can override a broader learned route.

B:

Stable BGP endpoint identity still depends on forwarding routes. The relevant technical distinction is that longest-prefix match can override a broader learned route.

C:

Different routing sources can compete for the same destination prefix. Here, however, longest-prefix match can override a broader learned route.

Question 489

A branch uses a more specific static route through an old tunnel after the site migrates to new dynamic routing. Which check most directly demonstrates the desired network behavior?

  1. Inspect the exact destination lookup and the installed prefixes after correction
  2. Inspect advertised attributes and verify observed remote path preference
  3. Capture hello traffic and inspect interface VLAN tagging and OSPF logs
  4. Compare multiple traffic flows and next-hop byte counters during the same period

Explanation

Correct Answer

A:

A narrow static path can win despite higher-level protocol preferences. Longest-prefix match can override a broader learned route.

Incorrect Answers

B:

Local configuration does not guarantee how third-party ASes choose routes. It would not resolve the documented symptom; a narrow static path can win despite higher-level protocol preferences.

C:

The evidence separates missing frames from protocol mismatch. In this situation, a narrow static path can win despite higher-level protocol preferences.

D:

Flow-level evidence explains imbalance better than one speed test. Here, however, a narrow static path can win despite higher-level protocol preferences.

Question 490

A branch uses a more specific static route through an old tunnel after the site migrates to new dynamic routing. Which assumption would be most misleading when investigating this situation?

  1. Assume changing OSPF cost will override a more specific static prefix automatically
  2. Set local preference internally and assume it is advertised to every outside provider
  3. Increase administrative distance to force a router to enter Full state
  4. Change BGP local preference to repair OSPF database-description rejection

Explanation

Correct Answer

A:

Prefix length is evaluated before comparing routes to a different prefix. Longest-prefix match can override a broader learned route.

Incorrect Answers

B:

Local preference is not a universal eBGP inbound steering mechanism. It would not resolve the documented symptom; prefix length is evaluated before comparing routes to a different prefix.

C:

Route preference cannot repair neighbor negotiation. In this situation, prefix length is evaluated before comparing routes to a different prefix.

D:

BGP attributes are unrelated to OSPF MTU negotiation. By contrast, prefix length is evaluated before comparing routes to a different prefix.

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

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