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Question 250
A new voice VLAN is absent from the distribution trunk despite correct edge tagging. What configuration should be checked?
- Native or untagged VLAN alignment
- Allowed VLAN list on trunk
- Inter-VLAN routing SVI
- VLAN existence across transit
Explanation
Correct Answer
B:Allowed VLAN lists determine transit reachability. A trunk transports only intended tagged VLANs permitted on that link.
Incorrect Answers
A:Mismatched untagged settings can send frames to an unexpected VLAN. But this does not address the case requirement to permit the intended tagged VLAN along the path.
C:An SVI/gateway provides Layer 3 forwarding between correctly segmented VLAN subnets. But this does not address the case requirement to permit the intended tagged VLAN along the path.
D:The VLAN must exist and be active wherever it is required along the Layer 2 path. But this does not address the case requirement to permit the intended tagged VLAN along the path.
Question 251
Two IP subnets on separate VLANs have no L3 gateway, so local ping works but cross-VLAN fails. What is missing?
- Inter-VLAN routing SVI
- Access VLAN assignment
- VLAN existence across transit
- Native or untagged VLAN alignment
Explanation
Correct Answer
A:Inter-VLAN routing is separate from bridged membership. An SVI/gateway provides Layer 3 forwarding between correctly segmented VLAN subnets.
Incorrect Answers
B:An untagged endpoint access port normally places traffic into its configured VLAN. But this does not address the case requirement to provide a supported routed gateway.
C:The VLAN must exist and be active wherever it is required along the Layer 2 path. But this does not address the case requirement to provide a supported routed gateway.
D:Mismatched untagged settings can send frames to an unexpected VLAN. But this does not address the case requirement to provide a supported routed gateway.
Question 252
A switch reports a workstation MAC on interface 1/1/12 but documentation says 1/1/9. What observation helps confirm reality?
- MAC table learning verification
- Native or untagged VLAN alignment
- VLAN existence across transit
- Access VLAN assignment
Explanation
Correct Answer
A:The dynamic MAC table can locate observed source MAC learning. Learned MAC entries reveal which VLAN and interface the switch associates with endpoints.
Incorrect Answers
B:Mismatched untagged settings can send frames to an unexpected VLAN. But this does not address the case requirement to identify actual host attachment.
C:The VLAN must exist and be active wherever it is required along the Layer 2 path. But this does not address the case requirement to identify actual host attachment.
D:An untagged endpoint access port normally places traffic into its configured VLAN. But this does not address the case requirement to identify actual host attachment.
Question 253
Two uplink endpoints should negotiate a bundle, and one side is configured passive. What mode can the peer use?
- Minimum-links operational policy
- LACP active negotiation
- Hash-based traffic distribution
- Member port consistency
Explanation
Correct Answer
B:An active LACP peer initiates negotiation. An LACP active participant initiates negotiation and can form with a compatible active or passive peer.
Incorrect Answers
A:Minimum member thresholds can intentionally shut a LAG when inadequate links remain. But this does not address the case requirement to form a dynamic aggregate with a passive endpoint.
C:A flow hash typically selects member links, so one flow need not use the sum of all capacities. But this does not address the case requirement to form a dynamic aggregate with a passive endpoint.
D:LAG members must align in speed, VLAN, trunk and related supported settings. But this does not address the case requirement to form a dynamic aggregate with a passive endpoint.
Question 254
Both sides of a new link bundle use passive mode and never aggregate. What role of passive mode explains it?
- Minimum-links operational policy
- LACP active negotiation
- LACP neighbor and state verification
- LACP passive behavior
Explanation
Correct Answer
D:Passive peers wait rather than initiate LACP negotiation. A passive peer responds to active negotiation but passive/passive is not expected to form a dynamic bundle.
Incorrect Answers
A:Minimum member thresholds can intentionally shut a LAG when inadequate links remain. But this does not address the case requirement to avoid a passive/passive LACP deadlock.
B:An LACP active participant initiates negotiation and can form with a compatible active or passive peer. But this does not address the case requirement to avoid a passive/passive LACP deadlock.
C:LACP partner state and actor/member status reveal whether bundling succeeded. But this does not address the case requirement to avoid a passive/passive LACP deadlock.
Question 255
A LAG rejects a member that has a conflicting native VLAN and speed setting. What must be aligned?
- LACP neighbor and state verification
- LACP active negotiation
- Hash-based traffic distribution
- Member port consistency
Explanation
Correct Answer
D:Physical and Layer 2 member parameters must match bundle requirements. LAG members must align in speed, VLAN, trunk and related supported settings.
Incorrect Answers
A:LACP partner state and actor/member status reveal whether bundling succeeded. But this does not address the case requirement to make all LACP members compatible.
B:An LACP active participant initiates negotiation and can form with a compatible active or passive peer. But this does not address the case requirement to make all LACP members compatible.
C:A flow hash typically selects member links, so one flow need not use the sum of all capacities. But this does not address the case requirement to make all LACP members compatible.
Question 256
A single long-lived TCP transfer uses one of four 10G links and never reaches 40G. Which distribution behavior explains this?
- LACP passive behavior
- Hash-based traffic distribution
- LACP active negotiation
- Minimum-links operational policy
Explanation
Correct Answer
B:Hashing usually maps one flow to a chosen member link. A flow hash typically selects member links, so one flow need not use the sum of all capacities.
Incorrect Answers
A:A passive peer responds to active negotiation but passive/passive is not expected to form a dynamic bundle. But this does not address the case requirement to distinguish per-flow load balancing from aggregate capacity.
C:An LACP active participant initiates negotiation and can form with a compatible active or passive peer. But this does not address the case requirement to distinguish per-flow load balancing from aggregate capacity.
D:Minimum member thresholds can intentionally shut a LAG when inadequate links remain. But this does not address the case requirement to distinguish per-flow load balancing from aggregate capacity.
Question 257
A critical LAG must become unavailable if fewer than two members remain. What setting should be reviewed?
- LACP neighbor and state verification
- Member port consistency
- LACP active negotiation
- Minimum-links operational policy
Explanation
Correct Answer
D:Minimum-links policy enforces a lower bound on available bundle capacity. Minimum member thresholds can intentionally shut a LAG when inadequate links remain.
Incorrect Answers
A:LACP partner state and actor/member status reveal whether bundling succeeded. But this does not address the case requirement to withdraw an undersized LAG rather than degrade silently.
B:LAG members must align in speed, VLAN, trunk and related supported settings. But this does not address the case requirement to withdraw an undersized LAG rather than degrade silently.
C:An LACP active participant initiates negotiation and can form with a compatible active or passive peer. But this does not address the case requirement to withdraw an undersized LAG rather than degrade silently.
Question 258
An operator sees two interfaces up physically but they are not collecting in the aggregate. Which protocol state should be inspected?
- Minimum-links operational policy
- Hash-based traffic distribution
- LACP neighbor and state verification
- LACP passive behavior
Explanation
Correct Answer
C:LACP actor and partner flags reveal negotiation failure. LACP partner state and actor/member status reveal whether bundling succeeded.
Incorrect Answers
A:Minimum member thresholds can intentionally shut a LAG when inadequate links remain. But this does not address the case requirement to verify actual aggregate membership.
B:A flow hash typically selects member links, so one flow need not use the sum of all capacities. But this does not address the case requirement to verify actual aggregate membership.
D:A passive peer responds to active negotiation but passive/passive is not expected to form a dynamic bundle. But this does not address the case requirement to verify actual aggregate membership.
Question 259
A passive/passive pair of CX switches has link carrier but no dynamic bundle. What configuration change would start negotiation?
- Minimum-links operational policy
- LACP active negotiation
- LACP passive behavior
- Member port consistency
Explanation
Correct Answer
C:At least one LACP endpoint needs active mode. A passive peer responds to active negotiation but passive/passive is not expected to form a dynamic bundle.
Incorrect Answers
A:Minimum member thresholds can intentionally shut a LAG when inadequate links remain. But this does not address the case requirement to initiate LACP exchange.
B:An LACP active participant initiates negotiation and can form with a compatible active or passive peer. But this does not address the case requirement to initiate LACP exchange.
D:LAG members must align in speed, VLAN, trunk and related supported settings. But this does not address the case requirement to initiate LACP exchange.
Question 260
Four 1G aggregated uplinks serve many users, yet a single file copy tops out near 1G. What should users understand?
- LACP neighbor and state verification
- Minimum-links operational policy
- Member port consistency
- Hash-based traffic distribution
Explanation
Correct Answer
D:A standard flow hash usually keeps a flow on one physical member. A flow hash typically selects member links, so one flow need not use the sum of all capacities.
Incorrect Answers
A:LACP partner state and actor/member status reveal whether bundling succeeded. But this does not address the case requirement to interpret aggregate throughput accurately.
B:Minimum member thresholds can intentionally shut a LAG when inadequate links remain. But this does not address the case requirement to interpret aggregate throughput accurately.
C:LAG members must align in speed, VLAN, trunk and related supported settings. But this does not address the case requirement to interpret aggregate throughput accurately.
HPE Network Switching Professional (HPE7-A08) Practice Tests