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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?
- Limit multicast to intended receivers and test one source leaving the network
- Use BPDU protection or equivalent on edge ports as appropriate
- Size bundles for realistic traffic patterns and surviving member capacity
- 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?
- Use validated DHCP snooping bindings with dynamic ARP inspection where supported
- Use supported BPDU guard or loop protection and isolate the rogue topology
- Investigate MAC address learning, VLAN path and any topology changes
- 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?
- Correlate switch protection logs with the suspect port and broadcast rate
- Check receiver joins, multicast routing state and per-VLAN forwarding
- Inspect active members, hashed session paths and tagged-frame counters under load
- 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?
- Disable all broadcast controls to keep the user port online
- Assume a continuously lit link LED proves the entire data path is stable
- Assume a common IPv4 subnet necessarily requires full host-to-host Layer 2 access
- 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?
- Document native VLAN policy and test management reachability after change
- Verify the DHCP relay and any authorized server uplinks before enabling globally
- Restore the port only after removing the loop and documenting the trigger
- 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?
- Check cabling category, connectors, negotiated speed and physical error counters
- Inspect member state and applied VLAN/port profiles on the affected physical switch
- Investigate a Layer 2 loop and restore a supported spanning-tree or LAG design
- 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?
- Test isolated-host communication versus access to the designated gateway/service port
- Check receiver joins, multicast routing state and per-VLAN forwarding
- Compare CRC and alignment counters using a known-good cable and endpoint
- 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?
- Assume two independent switches can always masquerade as one ordinary LAG peer
- Assume AP management remains accessible because wireless client VLANs still pass
- Rewrite the dynamic routing configuration before checking the link medium
- 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?
- Document IPv6 control-plane trust ports and test dual-stack clients
- Record the faulted patch-port and confirm the cable path meets distance requirements
- Document native VLAN policy and test management reachability after change
- 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?
- Check creation of the VLAN and its permitted status on each relevant trunk
- Restrict the trunk allowed-VLAN list and correct access-port membership
- Correct the aggregation topology so each LACP peer is a supported single or multi-chassis endpoint
- 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?
- Inspect LACP actor and partner identifiers and active collector/distributor flags
- Measure broadcast utilization and user performance before and after moving a pilot subnet
- Measure link-up to DHCP timing and ensure no bridge neighbor is attached
- 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