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Question 240
A university deployment needs to support multicast classroom video across several routed VLANs. What precaution is most important before the change is expanded?
- Size bundles for realistic traffic patterns and surviving member capacity
- Limit multicast to intended receivers and test one source leaving the network
- Record the faulted patch-port and confirm the cable path meets distance requirements
- Validate identical speed and native VLAN assumptions before putting the bundle into service
Explanation
Correct Answer
B:Uncontrolled multicast can consume shared uplink capacity. Membership alone does not prove end-to-end multicast delivery.
Incorrect Answers
A:Aggregate advertised rate does not guarantee every individual application's speed. By contrast, uncontrolled multicast can consume shared uplink capacity.
C:Recurring bad media should not be treated as a software mystery. In this situation, uncontrolled multicast can consume shared uplink capacity.
D:A LAG with mismatched port behavior can disrupt multiple VLANs. It would not resolve the documented symptom; uncontrolled multicast can consume shared uplink capacity.
Question 241
An engineering lab switches users between two network segments using a port profile and finds stale MAC addresses. Which configuration decision most directly resolves the situation?
- Use validated DHCP snooping bindings with dynamic ARP inspection where supported
- Inspect trunk allowed-VLAN lists and native/tagged state at both switches
- Investigate MAC address learning, VLAN path and any topology changes
- Clear or age stale learning appropriately and verify the new VLAN membership
Explanation
Correct Answer
D:Old forwarding state can delay convergence after a segment migration. Learning state confirms frames have moved to the intended port/VLAN.
Incorrect Answers
A:A binding table can be used to reject forged address-to-MAC claims. The relevant technical distinction is that old forwarding state can delay convergence after a segment migration.
B:Missing one VLAN on an otherwise healthy trunk isolates the problem to membership. It would not resolve the documented symptom; old forwarding state can delay convergence after a segment migration.
C:Unknown-unicast traffic is flooded when the switch has not learned the destination location. By contrast, old forwarding state can delay convergence after a segment migration.
Question 242
An engineering lab switches users between two network segments using a port profile and finds stale MAC addresses. Which check most directly demonstrates the desired network behavior?
- Inspect LACP actor and partner identifiers and active collector/distributor flags
- Verify LLDP neighbors and configured roles on sample physical ports after deployment
- Review partner system IDs, LACP member status and interface error counters
- Compare MAC location and VLAN association before and after moving a test endpoint
Explanation
Correct Answer
D:Learning state confirms frames have moved to the intended port/VLAN. Old forwarding state can delay convergence after a segment migration.
Incorrect Answers
A:Protocol details show why one member was excluded. By contrast, learning state confirms frames have moved to the intended port/VLAN.
B:Live adjacency checks catch wrong interface mappings. The relevant technical distinction is that learning state confirms frames have moved to the intended port/VLAN.
C:Protocol state distinguishes incompatible bundling from a physical fault. Here, however, learning state confirms frames have moved to the intended port/VLAN.
Question 243
An engineering lab switches users between two network segments using a port profile and finds stale MAC addresses. Which assumption would be most misleading when investigating this situation?
- Configure the same native VLAN differently at each end and ignore mismatch alarms
- Assume the old VLAN MAC table is instantly updated without any new traffic
- Disable spanning tree globally so both cables forward at once
- Enable edge behavior indiscriminately on every inter-switch trunk
Explanation
Correct Answer
B:Entries may persist until relearn or expiry. Old forwarding state can delay convergence after a segment migration.
Incorrect Answers
A:Untagged traffic can enter a different VLAN after crossing the link. The relevant technical distinction is that entries may persist until relearn or expiry.
C:Removing loop prevention can amplify broadcast storms. Here, however, entries may persist until relearn or expiry.
D:Network-facing ports still require loop protection. In this situation, entries may persist until relearn or expiry.
Question 244
An engineering lab switches users between two network segments using a port profile and finds stale MAC addresses. Which safeguard best reduces the deployment risk in this case?
- Run a representative endpoint connectivity test and preserve rollback of the port profile
- Size bundles for realistic traffic patterns and surviving member capacity
- Stage native-VLAN changes with console or out-of-band recovery ready
- Validate identical speed and native VLAN assumptions before putting the bundle into service
Explanation
Correct Answer
A:One device can expose a mapping error before a whole row of ports moves. Learning state confirms frames have moved to the intended port/VLAN.
Incorrect Answers
B:Aggregate advertised rate does not guarantee every individual application's speed. In this situation, one device can expose a mapping error before a whole row of ports moves.
C:A trunk error can lock out remote management. It would not resolve the documented symptom; one device can expose a mapping error before a whole row of ports moves.
D:A LAG with mismatched port behavior can disrupt multiple VLANs. Here, however, one device can expose a mapping error before a whole row of ports moves.
Question 245
A datacenter's campus handoff requires an isolated routed port rather than a trunk carrying every client VLAN. What is the most appropriate first technical change?
- Check creation of the VLAN and its permitted status on each relevant trunk
- Configure a supported routed Layer 3 interface and explicit peering/subnet
- Map the supported interface identifiers to the intended patch-panel ports before applying configuration
- Inspect trunk allowed-VLAN lists and native/tagged state at both switches
Explanation
Correct Answer
B:A routed boundary avoids unnecessary L2 extension between administrative domains. A healthy physical link alone cannot prove routed forwarding.
Incorrect Answers
A:An allowed tag that does not exist or propagate cannot forward frames. By contrast, a routed boundary avoids unnecessary L2 extension between administrative domains.
C:A valid port label on one platform may refer to a different port on another. In this situation, a routed boundary avoids unnecessary L2 extension between administrative domains.
D:Missing one VLAN on an otherwise healthy trunk isolates the problem to membership. It would not resolve the documented symptom; a routed boundary avoids unnecessary L2 extension between administrative domains.
Question 246
A datacenter's campus handoff requires an isolated routed port rather than a trunk carrying every client VLAN. Which observation would best verify that the intended behavior is working?
- Compare traffic counters and storm-control events before and after a controlled burst
- Verify LLDP neighbors and configured roles on sample physical ports after deployment
- Compare MAC tables before and after sending test traffic between known endpoints
- Inspect the routed port address, ARP/neighbor state and installed route
Explanation
Correct Answer
D:A healthy physical link alone cannot prove routed forwarding. A routed boundary avoids unnecessary L2 extension between administrative domains.
Incorrect Answers
A:The threshold must catch abnormal traffic without suppressing normal discovery. By contrast, a healthy physical link alone cannot prove routed forwarding.
B:Live adjacency checks catch wrong interface mappings. It would not resolve the documented symptom; a healthy physical link alone cannot prove routed forwarding.
C:Learned port entries reveal whether forwarding state is stable. The relevant technical distinction is that a healthy physical link alone cannot prove routed forwarding.
Question 247
A datacenter's campus handoff requires an isolated routed port rather than a trunk carrying every client VLAN. Which belief about the configuration should the team reject?
- Paste old port commands without reviewing platform port layout or supported syntax
- Leave a switchport as an unconfigured access VLAN and assume it creates a Layer 3 transit
- Set the allowed MAC count to one where a documented phone and desktop share the port
- Enable IPv4 DHCP snooping and assume IPv6 RAs are controlled automatically
Explanation
Correct Answer
B:VLAN switching does not imply an addressed routed interface. A routed boundary avoids unnecessary L2 extension between administrative domains.
Incorrect Answers
A:Blind migrations can apply uplink settings to user interfaces. The relevant technical distinction is that vLAN switching does not imply an addressed routed interface.
C:An overrestrictive limit will disable valid access. Here, however, vLAN switching does not imply an addressed routed interface.
D:IPv4 DHCP security does not validate IPv6 router advertisements. By contrast, vLAN switching does not imply an addressed routed interface.
Question 248
A datacenter's campus handoff requires an isolated routed port rather than a trunk carrying every client VLAN. What should be included in the rollout plan to limit a foreseeable failure?
- Document IPv6 control-plane trust ports and test dual-stack clients
- Test one cable or peer failure before moving production traffic
- Check that no sensitive campus VLANs remain allowed on the handoff
- Isolate the newly connected link and reintroduce redundancy with a tested design
Explanation
Correct Answer
C:L3 handoffs should not unintentionally bridge client segments. A healthy physical link alone cannot prove routed forwarding.
Incorrect Answers
A:Protecting only IPv4 leaves a separate attack path. The relevant technical distinction is that l3 handoffs should not unintentionally bridge client segments.
B:A bundle that works only in normal conditions offers poor resilience. In this situation, l3 handoffs should not unintentionally bridge client segments.
D:A staged restoration protects the rest of the campus. Here, however, l3 handoffs should not unintentionally bridge client segments.
Question 249
A user edge port needs a fixed maximum number of legitimate MAC addresses. What should the network engineer do to address this requirement?
- Review LACP distribution and supported per-flow hashing behavior
- Enable supported port-security or MAC-limit behavior consistent with a phone-plus-PC profile
- Remove unused VLAN membership after validating dependencies and routing
- Plan the supported IGMP snooping and routed multicast control design
Explanation
Correct Answer
B:The limit should accommodate approved devices while blocking unplanned bridging. Both acceptance and rejection establish the effective limit.
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; the limit should accommodate approved devices while blocking unplanned bridging.
C:Retiring dormant segments reduces accidental reachability and operational confusion. In this situation, the limit should accommodate approved devices while blocking unplanned bridging.
D:Layer 2 listener awareness and Layer 3 multicast forwarding are different functions. Here, however, the limit should accommodate approved devices while blocking unplanned bridging.
Question 250
A user edge port needs a fixed maximum number of legitimate MAC addresses. What should the team inspect to confirm the result?
- Inspect active members, hashed session paths and tagged-frame counters under load
- Connect an authorized phone and PC, then a third test device, and observe violation behavior
- Verify LLDP neighbors and configured roles on sample physical ports after deployment
- Review partner system IDs, LACP member status and interface error counters
Explanation
Correct Answer
B:Both acceptance and rejection establish the effective limit. The limit should accommodate approved devices while blocking unplanned bridging.
Incorrect Answers
A:Per-member evidence helps isolate a bad link or mismatch. In this situation, both acceptance and rejection establish the effective limit.
C:Live adjacency checks catch wrong interface mappings. By contrast, both acceptance and rejection establish the effective limit.
D:Protocol state distinguishes incompatible bundling from a physical fault. It would not resolve the documented symptom; both acceptance and rejection establish the effective limit.
HPE Network Campus Access Professional (HPE7-A01) Practice Tests