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HP HPE7-A01 Practice Test 23

Question 220

A branch access port takes too long to reach forwarding when a user computer starts. Which safeguard best reduces the deployment risk in this case?

  1. Limit multicast to intended receivers and test one source leaving the network
  2. Use BPDU protection or equivalent on edge ports as appropriate
  3. Size bundles for realistic traffic patterns and surviving member capacity
  4. Verify the DHCP relay and any authorized server uplinks before enabling globally

Explanation

Correct Answer

B:

A user accidentally attaching a switch should not cause a loop. The optimization is safe only for genuine edge ports.

Incorrect Answers

A:

Uncontrolled multicast can consume shared uplink capacity. It would not resolve the documented symptom; a user accidentally attaching a switch should not cause a loop.

C:

Aggregate advertised rate does not guarantee every individual application's speed. By contrast, a user accidentally attaching a switch should not cause a loop.

D:

Inaccurate trust boundaries can stop all address assignment. In this situation, a user accidentally attaching a switch should not cause a loop.

Question 221

A previously stable campus starts a broadcast storm after an unmanaged hub is connected to an edge port. What is the most appropriate first technical change?

  1. Use validated DHCP snooping bindings with dynamic ARP inspection where supported
  2. Use supported BPDU guard or loop protection and isolate the rogue topology
  3. Investigate MAC address learning, VLAN path and any topology changes
  4. Review LACP distribution and supported per-flow hashing behavior

Explanation

Correct Answer

B:

Edge protections can shut problematic ports before a loop spreads. The event chain points to the source of the loop.

Incorrect Answers

A:

A binding table can be used to reject forged address-to-MAC claims. The relevant technical distinction is that edge protections can shut problematic ports before a loop spreads.

C:

Unknown-unicast traffic is flooded when the switch has not learned the destination location. By contrast, edge protections can shut problematic ports before a loop spreads.

D:

Hashing can preserve a flow on one member even when the bundle has several links. It would not resolve the documented symptom; edge protections can shut problematic ports before a loop spreads.

Question 222

A previously stable campus starts a broadcast storm after an unmanaged hub is connected to an edge port. Which observation would best verify that the intended behavior is working?

  1. Correlate switch protection logs with the suspect port and broadcast rate
  2. Check receiver joins, multicast routing state and per-VLAN forwarding
  3. Inspect active members, hashed session paths and tagged-frame counters under load
  4. Compare member interface state and MAC learning for affected versus working VLANs

Explanation

Correct Answer

A:

The event chain points to the source of the loop. Edge protections can shut problematic ports before a loop spreads.

Incorrect Answers

B:

Membership alone does not prove end-to-end multicast delivery. Here, however, the event chain points to the source of the loop.

C:

Per-member evidence helps isolate a bad link or mismatch. By contrast, the event chain points to the source of the loop.

D:

Focused comparison reveals the local forwarding defect. The relevant technical distinction is that the event chain points to the source of the loop.

Question 223

A previously stable campus starts a broadcast storm after an unmanaged hub is connected to an edge port. Which belief about the configuration should the team reject?

  1. Disable all broadcast controls to keep the user port online
  2. Assume a continuously lit link LED proves the entire data path is stable
  3. Assume a common IPv4 subnet necessarily requires full host-to-host Layer 2 access
  4. Assume a switch always drops every broadcast beyond what users need by default

Explanation

Correct Answer

A:

That may let a small wiring error affect the whole VLAN. Edge protections can shut problematic ports before a loop spreads.

Incorrect Answers

B:

Physical carrier does not exclude STP blocking or frame errors. Here, however, that may let a small wiring error affect the whole VLAN.

C:

Private VLAN design can restrict local peer communication. The relevant technical distinction is that that may let a small wiring error affect the whole VLAN.

D:

L2 broadcast delivery is an essential behavior and needs deliberate limits. In this situation, that may let a small wiring error affect the whole VLAN.

Question 224

A previously stable campus starts a broadcast storm after an unmanaged hub is connected to an edge port. What should be included in the rollout plan to limit a foreseeable failure?

  1. Document native VLAN policy and test management reachability after change
  2. Verify the DHCP relay and any authorized server uplinks before enabling globally
  3. Restore the port only after removing the loop and documenting the trigger
  4. Document IPv6 control-plane trust ports and test dual-stack clients

Explanation

Correct Answer

C:

Recovery must not immediately recreate the storm. The event chain points to the source of the loop.

Incorrect Answers

A:

Incorrect native tagging can remove remote switch access. It would not resolve the documented symptom; recovery must not immediately recreate the storm.

B:

Inaccurate trust boundaries can stop all address assignment. In this situation, recovery must not immediately recreate the storm.

D:

Protecting only IPv4 leaves a separate attack path. Here, however, recovery must not immediately recreate the storm.

Question 225

A switch interface reports many inbound errors after changing a copper patch cord. What should the network engineer do to address this requirement?

  1. Check cabling category, connectors, negotiated speed and physical error counters
  2. Inspect member state and applied VLAN/port profiles on the affected physical switch
  3. Investigate a Layer 2 loop and restore a supported spanning-tree or LAG design
  4. Check creation of the VLAN and its permitted status on each relevant trunk

Explanation

Correct Answer

A:

Electrical faults can cause frame corruption without affecting the configuration database. A controlled replacement isolates physical-layer defects.

Incorrect Answers

B:

A logical stack can still have per-port membership differences or failures. It would not resolve the documented symptom; electrical faults can cause frame corruption without affecting the configuration database.

C:

MAC movement can signal circulating frames across parallel physical links. By contrast, electrical faults can cause frame corruption without affecting the configuration database.

D:

An allowed tag that does not exist or propagate cannot forward frames. In this situation, electrical faults can cause frame corruption without affecting the configuration database.

Question 226

A switch interface reports many inbound errors after changing a copper patch cord. What should the team inspect to confirm the result?

  1. Test isolated-host communication versus access to the designated gateway/service port
  2. Check receiver joins, multicast routing state and per-VLAN forwarding
  3. Compare CRC and alignment counters using a known-good cable and endpoint
  4. Connect an authorized phone and PC, then a third test device, and observe violation behavior

Explanation

Correct Answer

C:

A controlled replacement isolates physical-layer defects. Electrical faults can cause frame corruption without affecting the configuration database.

Incorrect Answers

A:

The test verifies that only approved local peers are reachable. It would not resolve the documented symptom; a controlled replacement isolates physical-layer defects.

B:

Membership alone does not prove end-to-end multicast delivery. The relevant technical distinction is that a controlled replacement isolates physical-layer defects.

D:

Both acceptance and rejection establish the effective limit. By contrast, a controlled replacement isolates physical-layer defects.

Question 227

A switch interface reports many inbound errors after changing a copper patch cord. Which misconception is most likely to obstruct a correct fix?

  1. Assume two independent switches can always masquerade as one ordinary LAG peer
  2. Assume AP management remains accessible because wireless client VLANs still pass
  3. Rewrite the dynamic routing configuration before checking the link medium
  4. Assume adding more IP routes will fix a MAC learning failure in the same VLAN

Explanation

Correct Answer

C:

Routing cannot repair corrupted Ethernet frames. Electrical faults can cause frame corruption without affecting the configuration database.

Incorrect Answers

A:

Without a supported MC-LAG design the partner identities may conflict. The relevant technical distinction is that routing cannot repair corrupted Ethernet frames.

B:

Control and data networks can have different tags. Here, however, routing cannot repair corrupted Ethernet frames.

D:

Layer 3 route changes cannot correct a basic Layer 2 forwarding table problem. By contrast, routing cannot repair corrupted Ethernet frames.

Question 228

A switch interface reports many inbound errors after changing a copper patch cord. What precaution is most important before the change is expanded?

  1. Document IPv6 control-plane trust ports and test dual-stack clients
  2. Record the faulted patch-port and confirm the cable path meets distance requirements
  3. Document native VLAN policy and test management reachability after change
  4. Limit multicast to intended receivers and test one source leaving the network

Explanation

Correct Answer

B:

Recurring bad media should not be treated as a software mystery. A controlled replacement isolates physical-layer defects.

Incorrect Answers

A:

Protecting only IPv4 leaves a separate attack path. The relevant technical distinction is that recurring bad media should not be treated as a software mystery.

C:

Incorrect native tagging can remove remote switch access. Here, however, recurring bad media should not be treated as a software mystery.

D:

Uncontrolled multicast can consume shared uplink capacity. In this situation, recurring bad media should not be treated as a software mystery.

Question 229

A distribution switch needs a shared logical uplink while a peer advertises a different LACP system identity. Which configuration decision most directly resolves the situation?

  1. Check creation of the VLAN and its permitted status on each relevant trunk
  2. Restrict the trunk allowed-VLAN list and correct access-port membership
  3. Correct the aggregation topology so each LACP peer is a supported single or multi-chassis endpoint
  4. Inspect trunk allowed-VLAN lists and native/tagged state at both switches

Explanation

Correct Answer

C:

A valid partner identity is required for expected bundle membership. Protocol details show why one member was excluded.

Incorrect Answers

A:

An allowed tag that does not exist or propagate cannot forward frames. It would not resolve the documented symptom; a valid partner identity is required for expected bundle membership.

B:

VLAN propagation should follow approved segmentation rather than every available tag. Here, however, a valid partner identity is required for expected bundle membership.

D:

Missing one VLAN on an otherwise healthy trunk isolates the problem to membership. In this situation, a valid partner identity is required for expected bundle membership.

Question 230

A distribution switch needs a shared logical uplink while a peer advertises a different LACP system identity. Which check most directly demonstrates the desired network behavior?

  1. Inspect LACP actor and partner identifiers and active collector/distributor flags
  2. Measure broadcast utilization and user performance before and after moving a pilot subnet
  3. Measure link-up to DHCP timing and ensure no bridge neighbor is attached
  4. Compare member interface state and MAC learning for affected versus working VLANs

Explanation

Correct Answer

A:

Protocol details show why one member was excluded. A valid partner identity is required for expected bundle membership.

Incorrect Answers

B:

Improved L2 containment should produce measurable results. By contrast, protocol details show why one member was excluded.

C:

The optimization is safe only for genuine edge ports. It would not resolve the documented symptom; protocol details show why one member was excluded.

D:

Focused comparison reveals the local forwarding defect. In this situation, protocol details show why one member was excluded.

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

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