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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?
- Check that no sensitive campus VLANs remain allowed on the handoff
- Test DHCP, ARP and normal multicast at the chosen threshold
- Record the faulted patch-port and confirm the cable path meets distance requirements
- 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?
- Correct the aggregation topology so each LACP peer is a supported single or multi-chassis endpoint
- Compare LAG hashing, member consistency and VLAN configuration on the logical bundle
- Clear or age stale learning appropriately and verify the new VLAN membership
- 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?
- Inspect active members, hashed session paths and tagged-frame counters under load
- Verify LLDP neighbors and configured roles on sample physical ports after deployment
- Connect an authorized phone and PC, then a third test device, and observe violation behavior
- 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?
- Assume LLDP discovers reachable routes for every advertised management address
- Enable IPv4 DHCP snooping and assume IPv6 RAs are controlled automatically
- Assume one working client flow proves every LAG member is configured correctly
- 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?
- Review management reachability from the monitoring system after changing TLVs
- Test each member independently before declaring the bundled uplink healthy
- Isolate the newly connected link and reintroduce redundancy with a tested design
- 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?
- Review LACP distribution and supported per-flow hashing behavior
- Align MST region parameters and VLAN-to-instance maps across participating devices
- Check creation of the VLAN and its permitted status on each relevant trunk
- 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?
- Compare member interface state and MAC learning for affected versus working VLANs
- Capture gateway ARP replies and verify intended active/standby or active-gateway behavior
- Measure broadcast utilization and user performance before and after moving a pilot subnet
- 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.
- Inspect trunk allowed-VLAN lists and native/tagged state at both switches
- Remove the unintended downstream bridge or redesign the port as an approved network link
- Map the supported interface identifiers to the intended patch-panel ports before applying configuration
- Validate identical speed and native VLAN assumptions before putting the bundle into service
- 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?
- Document IPv6 control-plane trust ports and test dual-stack clients
- Require approval and a loop-free design for downstream bridges
- Limit multicast to intended receivers and test one source leaving the network
- 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?
- Remove unused VLAN membership after validating dependencies and routing
- Correct the LLDP management address advertisement and intended management context
- Assess narrowing L2 domains or routing at distribution boundaries
- 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?
- Compare traffic counters and storm-control events before and after a controlled burst
- Audit MAC tables, active interfaces and DHCP scopes for the targeted VLANs
- Capture approved and unauthorized RA messages and inspect edge policy counters
- 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