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HP HPE7-A01 Practice Test 27

Question 260

A school needs to block an access endpoint from flooding unknown broadcasts during a loop or infection. What should be included in the rollout plan to limit a foreseeable failure?

  1. Check that no sensitive campus VLANs remain allowed on the handoff
  2. Test DHCP, ARP and normal multicast at the chosen threshold
  3. Record the faulted patch-port and confirm the cable path meets distance requirements
  4. Size bundles for realistic traffic patterns and surviving member capacity

Explanation

Correct Answer

B:

Overaggressive control can break foundational network services. The threshold must catch abnormal traffic without suppressing normal discovery.

Incorrect Answers

A:

L3 handoffs should not unintentionally bridge client segments. By contrast, overaggressive control can break foundational network services.

C:

Recurring bad media should not be treated as a software mystery. In this situation, overaggressive control can break foundational network services.

D:

Aggregate advertised rate does not guarantee every individual application's speed. It would not resolve the documented symptom; overaggressive control can break foundational network services.

Question 261

An enterprise replaces single uplinks with an LACP bundle and users see intermittent VLAN-specific packet loss. What should the network engineer do to address this requirement?

  1. Correct the aggregation topology so each LACP peer is a supported single or multi-chassis endpoint
  2. Compare LAG hashing, member consistency and VLAN configuration on the logical bundle
  3. Clear or age stale learning appropriately and verify the new VLAN membership
  4. Align LACP active/passive modes and bundle membership on both endpoints

Explanation

Correct Answer

B:

Inconsistent member settings or port treatment can affect only certain flows. Per-member evidence helps isolate a bad link or mismatch.

Incorrect Answers

A:

A valid partner identity is required for expected bundle membership. The relevant technical distinction is that inconsistent member settings or port treatment can affect only certain flows.

C:

Old forwarding state can delay convergence after a segment migration. By contrast, inconsistent member settings or port treatment can affect only certain flows.

D:

Negotiation and common aggregation parameters are needed for a functional LAG. It would not resolve the documented symptom; inconsistent member settings or port treatment can affect only certain flows.

Question 262

An enterprise replaces single uplinks with an LACP bundle and users see intermittent VLAN-specific packet loss. What should the team inspect to confirm the result?

  1. Inspect active members, hashed session paths and tagged-frame counters under load
  2. Verify LLDP neighbors and configured roles on sample physical ports after deployment
  3. Connect an authorized phone and PC, then a third test device, and observe violation behavior
  4. Test isolated-host communication versus access to the designated gateway/service port

Explanation

Correct Answer

A:

Per-member evidence helps isolate a bad link or mismatch. Inconsistent member settings or port treatment can affect only certain flows.

Incorrect Answers

B:

Live adjacency checks catch wrong interface mappings. Here, however, per-member evidence helps isolate a bad link or mismatch.

C:

Both acceptance and rejection establish the effective limit. The relevant technical distinction is that per-member evidence helps isolate a bad link or mismatch.

D:

The test verifies that only approved local peers are reachable. By contrast, per-member evidence helps isolate a bad link or mismatch.

Question 263

An enterprise replaces single uplinks with an LACP bundle and users see intermittent VLAN-specific packet loss. Which misconception is most likely to obstruct a correct fix?

  1. Assume LLDP discovers reachable routes for every advertised management address
  2. Enable IPv4 DHCP snooping and assume IPv6 RAs are controlled automatically
  3. Assume one working client flow proves every LAG member is configured correctly
  4. Raise every uplink speed without examining oversized broadcast-domain design

Explanation

Correct Answer

C:

Hashing can hide a fault until traffic chooses the affected member. Inconsistent member settings or port treatment can affect only certain flows.

Incorrect Answers

A:

LLDP conveys topology information, not routing-table contents. Here, however, hashing can hide a fault until traffic chooses the affected member.

B:

IPv4 DHCP security does not validate IPv6 router advertisements. The relevant technical distinction is that hashing can hide a fault until traffic chooses the affected member.

D:

More bandwidth alone does not correct excess flooding scope. In this situation, hashing can hide a fault until traffic chooses the affected member.

Question 264

An enterprise replaces single uplinks with an LACP bundle and users see intermittent VLAN-specific packet loss. What precaution is most important before the change is expanded?

  1. Review management reachability from the monitoring system after changing TLVs
  2. Test each member independently before declaring the bundled uplink healthy
  3. Isolate the newly connected link and reintroduce redundancy with a tested design
  4. Record the faulted patch-port and confirm the cable path meets distance requirements

Explanation

Correct Answer

B:

A balanced bundle should not contain one defective path. Per-member evidence helps isolate a bad link or mismatch.

Incorrect Answers

A:

Inventory accuracy depends on real operator access. It would not resolve the documented symptom; a balanced bundle should not contain one defective path.

C:

A staged restoration protects the rest of the campus. In this situation, a balanced bundle should not contain one defective path.

D:

Recurring bad media should not be treated as a software mystery. Here, however, a balanced bundle should not contain one defective path.

Question 265

A switch reports unexpected BPDU guard shutdown on an edge port where a small workgroup switch was added. Which configuration decision most directly resolves the situation?

  1. Review LACP distribution and supported per-flow hashing behavior
  2. Align MST region parameters and VLAN-to-instance maps across participating devices
  3. Check creation of the VLAN and its permitted status on each relevant trunk
  4. Remove the unintended downstream bridge or redesign the port as an approved network link

Explanation

Correct Answer

D:

BPDU guard is signaling that the edge assumption is no longer true. The evidence distinguishes a legitimate topology change from a wiring error.

Incorrect Answers

A:

Hashing can preserve a flow on one member even when the bundle has several links. It would not resolve the documented symptom; bPDU guard is signaling that the edge assumption is no longer true.

B:

Consistent region membership is necessary for predictable MST behavior. By contrast, bPDU guard is signaling that the edge assumption is no longer true.

C:

An allowed tag that does not exist or propagate cannot forward frames. In this situation, bPDU guard is signaling that the edge assumption is no longer true.

Question 266

A switch reports unexpected BPDU guard shutdown on an edge port where a small workgroup switch was added. Which check most directly demonstrates the desired network behavior?

  1. Compare member interface state and MAC learning for affected versus working VLANs
  2. Capture gateway ARP replies and verify intended active/standby or active-gateway behavior
  3. Measure broadcast utilization and user performance before and after moving a pilot subnet
  4. Inspect BPDU source and protection logs before re-enabling the port

Explanation

Correct Answer

D:

The evidence distinguishes a legitimate topology change from a wiring error. BPDU guard is signaling that the edge assumption is no longer true.

Incorrect Answers

A:

Focused comparison reveals the local forwarding defect. It would not resolve the documented symptom; the evidence distinguishes a legitimate topology change from a wiring error.

B:

The MAC and virtual-address state explain competing replies. The relevant technical distinction is that the evidence distinguishes a legitimate topology change from a wiring error.

C:

Improved L2 containment should produce measurable results. By contrast, the evidence distinguishes a legitimate topology change from a wiring error.

Question 267

A switch reports unexpected BPDU guard shutdown on an edge port where a small workgroup switch was added. Which TWO actions together implement the required change and verify that it works? Choose TWO.

  1. Inspect trunk allowed-VLAN lists and native/tagged state at both switches
  2. Remove the unintended downstream bridge or redesign the port as an approved network link
  3. Map the supported interface identifiers to the intended patch-panel ports before applying configuration
  4. Validate identical speed and native VLAN assumptions before putting the bundle into service
  5. Inspect BPDU source and protection logs before re-enabling the port

Explanation

Correct Answers

B:

BPDU guard is signaling that the edge assumption is no longer true. The evidence distinguishes a legitimate topology change from a wiring error.

E:

The evidence distinguishes a legitimate topology change from a wiring error. BPDU guard is signaling that the edge assumption is no longer true.

Incorrect Answers

A:

Missing one VLAN on an otherwise healthy trunk isolates the problem to membership. Here, however, bPDU guard is signaling that the edge assumption is no longer true.

C:

A valid port label on one platform may refer to a different port on another. By contrast, bPDU guard is signaling that the edge assumption is no longer true.

D:

A LAG with mismatched port behavior can disrupt multiple VLANs. The relevant technical distinction is that an access drop should not silently become an unmanaged uplink.

Question 268

A switch reports unexpected BPDU guard shutdown on an edge port where a small workgroup switch was added. Which safeguard best reduces the deployment risk in this case?

  1. Document IPv6 control-plane trust ports and test dual-stack clients
  2. Require approval and a loop-free design for downstream bridges
  3. Limit multicast to intended receivers and test one source leaving the network
  4. Document native VLAN policy and test management reachability after change

Explanation

Correct Answer

B:

An access drop should not silently become an unmanaged uplink. The evidence distinguishes a legitimate topology change from a wiring error.

Incorrect Answers

A:

Protecting only IPv4 leaves a separate attack path. The relevant technical distinction is that an access drop should not silently become an unmanaged uplink.

C:

Uncontrolled multicast can consume shared uplink capacity. In this situation, an access drop should not silently become an unmanaged uplink.

D:

Incorrect native tagging can remove remote switch access. Here, however, an access drop should not silently become an unmanaged uplink.

Question 269

A switch contains legacy user VLANs that should no longer be active on any access port. What is the most appropriate first technical change?

  1. Remove unused VLAN membership after validating dependencies and routing
  2. Correct the LLDP management address advertisement and intended management context
  3. Assess narrowing L2 domains or routing at distribution boundaries
  4. Investigate MAC address learning, VLAN path and any topology changes

Explanation

Correct Answer

A:

Retiring dormant segments reduces accidental reachability and operational confusion. No active endpoint should lose service when the segment is removed.

Incorrect Answers

B:

Neighbor inventory should reflect reachable approved management endpoints. Here, however, retiring dormant segments reduces accidental reachability and operational confusion.

C:

Smaller broadcast scopes reduce unnecessary flooding across the campus. In this situation, retiring dormant segments reduces accidental reachability and operational confusion.

D:

Unknown-unicast traffic is flooded when the switch has not learned the destination location. It would not resolve the documented symptom; retiring dormant segments reduces accidental reachability and operational confusion.

Question 270

A switch contains legacy user VLANs that should no longer be active on any access port. Which observation would best verify that the intended behavior is working?

  1. Compare traffic counters and storm-control events before and after a controlled burst
  2. Audit MAC tables, active interfaces and DHCP scopes for the targeted VLANs
  3. Capture approved and unauthorized RA messages and inspect edge policy counters
  4. Inspect active members, hashed session paths and tagged-frame counters under load

Explanation

Correct Answer

B:

No active endpoint should lose service when the segment is removed. Retiring dormant segments reduces accidental reachability and operational confusion.

Incorrect Answers

A:

The threshold must catch abnormal traffic without suppressing normal discovery. By contrast, no active endpoint should lose service when the segment is removed.

C:

The guard must block the rogue source while allowing real gateway advertisements. In this situation, no active endpoint should lose service when the segment is removed.

D:

Per-member evidence helps isolate a bad link or mismatch. It would not resolve the documented symptom; no active endpoint should lose service when the segment is removed.

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

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