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HP HPE7-A01 Practice Test 25

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?

  1. Size bundles for realistic traffic patterns and surviving member capacity
  2. Limit multicast to intended receivers and test one source leaving the network
  3. Record the faulted patch-port and confirm the cable path meets distance requirements
  4. 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?

  1. Use validated DHCP snooping bindings with dynamic ARP inspection where supported
  2. Inspect trunk allowed-VLAN lists and native/tagged state at both switches
  3. Investigate MAC address learning, VLAN path and any topology changes
  4. 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?

  1. Inspect LACP actor and partner identifiers and active collector/distributor flags
  2. Verify LLDP neighbors and configured roles on sample physical ports after deployment
  3. Review partner system IDs, LACP member status and interface error counters
  4. 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?

  1. Configure the same native VLAN differently at each end and ignore mismatch alarms
  2. Assume the old VLAN MAC table is instantly updated without any new traffic
  3. Disable spanning tree globally so both cables forward at once
  4. 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?

  1. Run a representative endpoint connectivity test and preserve rollback of the port profile
  2. Size bundles for realistic traffic patterns and surviving member capacity
  3. Stage native-VLAN changes with console or out-of-band recovery ready
  4. 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?

  1. Check creation of the VLAN and its permitted status on each relevant trunk
  2. Configure a supported routed Layer 3 interface and explicit peering/subnet
  3. Map the supported interface identifiers to the intended patch-panel ports before applying configuration
  4. 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?

  1. Compare traffic counters and storm-control events before and after a controlled burst
  2. Verify LLDP neighbors and configured roles on sample physical ports after deployment
  3. Compare MAC tables before and after sending test traffic between known endpoints
  4. 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?

  1. Paste old port commands without reviewing platform port layout or supported syntax
  2. Leave a switchport as an unconfigured access VLAN and assume it creates a Layer 3 transit
  3. Set the allowed MAC count to one where a documented phone and desktop share the port
  4. 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?

  1. Document IPv6 control-plane trust ports and test dual-stack clients
  2. Test one cable or peer failure before moving production traffic
  3. Check that no sensitive campus VLANs remain allowed on the handoff
  4. 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?

  1. Review LACP distribution and supported per-flow hashing behavior
  2. Enable supported port-security or MAC-limit behavior consistent with a phone-plus-PC profile
  3. Remove unused VLAN membership after validating dependencies and routing
  4. 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?

  1. Inspect active members, hashed session paths and tagged-frame counters under load
  2. Connect an authorized phone and PC, then a third test device, and observe violation behavior
  3. Verify LLDP neighbors and configured roles on sample physical ports after deployment
  4. 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

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