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HP HPE7-A08 Bundle

Exam Code: HPE7-A08

Exam Name HPE Network Switching Professional

Certification Provider: HP

Corresponding Certification: HPE Aruba Networking Certified Professional - Switching

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HP HPE7-A08 Practice Test 45

Question 440

The HPE AOS-CX switching case is: An interface is administratively disabled while a technician incorrectly diagnoses an unsupported spanning-tree block. Select TWO: a corrective switching action and separate evidence that the correction worked. (Select TWO.)

  1. A corrected test host ARPs for the intended gateway and reaches both a local peer and an approved remote subnet.
  2. Use port operational status, optical diagnostics and CRC or FCS counters to distinguish physical failure from VLAN and routing issues.
  3. A repaired link maintains expected negotiation and clean counters across a sustained bidirectional traffic test.
  4. Inspect MSTP region configuration, root election and per-instance port states to explain blocking or topology churn.
  5. Compare a failed endpoint's observed MAC-learning VLAN, access interface membership and IP lease with the expected role.

Explanation

Correct Answers

B:

The targeted correction for An interface is administratively disabled while a technician incorrectly diagnoses an unsupported spanning-tree block is: Use port operational status, optical diagnostics and CRC or FCS counters to distinguish physical failure from VLAN and routing issues. It reduces the risk that repeated CRC errors or light loss can mimic application failures even when the port intermittently reports up.

C:

A separate operational validation for An interface is administratively disabled while a technician incorrectly diagnoses an unsupported spanning-tree block is: A repaired link maintains expected negotiation and clean counters across a sustained bidirectional traffic test. It proves intended behavior instead of accepting configuration presence alone.

Incorrect Answers

A:

This alternative concerns duplicate or mismatched host ipv4 settings; its associated risk is: A duplicate or off-subnet gateway can make traffic fail at the first hop even while switch links and route tables appear normal. The observed case An interface is administratively disabled while a technician incorrectly diagnoses an unsupported spanning-tree block requires the more specific ethernet carrier optic and physical fault isolation control. The targeted action is: Use port operational status, optical diagnostics and CRC or FCS counters to distinguish physical failure from VLAN and routing issues.

D:

This alternative concerns spanning tree topology and root inconsistency; its associated risk is: An unexpected root or mismatched region can suppress the intended redundant forwarding path and cause intermittent client connectivity. The observed case An interface is administratively disabled while a technician incorrectly diagnoses an unsupported spanning-tree block requires the more specific ethernet carrier optic and physical fault isolation control. The targeted action is: Use port operational status, optical diagnostics and CRC or FCS counters to distinguish physical failure from VLAN and routing issues.

E:

This alternative concerns incorrect vlan access assignment identification; its associated risk is: A host in the wrong access VLAN can contact the wrong DHCP scope or become disconnected from its authorized services. The observed case An interface is administratively disabled while a technician incorrectly diagnoses an unsupported spanning-tree block requires the more specific ethernet carrier optic and physical fault isolation control. The targeted action is: Use port operational status, optical diagnostics and CRC or FCS counters to distinguish physical failure from VLAN and routing issues.

Question 441

An HPE Aruba Networking engineer observes: A two-member uplink bundle carries data over only one port because the other side has LACP disabled. The corrective solution must keep intended connectivity, segmentation, and operational resilience. Which change best addresses the observed switching requirement?

  1. Check VSX peer roles, ISL state, separate keepalive and multichassis LAG status when distribution connectivity is asymmetric.
  2. Trace the affected VLAN over all inter-switch trunks and reconcile tagged or untagged handling at each hop.
  3. Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.
  4. Review VSF member status, conductor role, topology and stack link health before treating missing interfaces as VLAN misconfiguration.

Explanation

Correct Answer

C:

The decisive observed condition is: A two-member uplink bundle carries data over only one port because the other side has LACP disabled. The appropriate switching action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle. It addresses the risk that a LAG with the wrong partner or member state can behave like a link failure despite all cables showing carrier. Confirm with: Both ends show expected active aggregation members and service survives one physical member shutdown.

Incorrect Answers

A:

This alternative concerns vsx keepalive isl and peer-state fault; its associated risk is: An ISL failure without a correctly operating peer control path can disrupt dual-homed systems and complicate split recovery. The observed case A two-member uplink bundle carries data over only one port because the other side has LACP disabled requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

B:

This alternative concerns trunk allowed vlan and native tag fault detection; its associated risk is: One mismatched trunk can isolate an entire VLAN while other VLANs continue operating normally, obscuring the break. The observed case A two-member uplink bundle carries data over only one port because the other side has LACP disabled requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

D:

This alternative concerns vsf member identity and split detection fault; its associated risk is: A failed stack member or split may remove physical access ports and strand endpoints while the logical switch remains partially reachable. The observed case A two-member uplink bundle carries data over only one port because the other side has LACP disabled requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

Question 442

An engineer investigates: A two-member uplink bundle carries data over only one port because the other side has LACP disabled. Which verification proves the intended operational state rather than just a saved configuration?

  1. VSX state, ISL and keepalive show expected health and host traffic remains available after one controlled peer fault.
  2. The stack returns to a single intended logical inventory with healthy member ports and validated failover.
  3. Both ends show expected active aggregation members and service survives one physical member shutdown.
  4. A probe from each side of the affected trunk passes on the required VLAN without unapproved tag leakage.

Explanation

Correct Answer

C:

The independent acceptance evidence for A two-member uplink bundle carries data over only one port because the other side has LACP disabled is: Both ends show expected active aggregation members and service survives one physical member shutdown. It tests whether the team has actually implemented: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle. An enabled interface or saved configuration by itself is not evidence of complete service recovery.

Incorrect Answers

A:

This alternative concerns vsx keepalive isl and peer-state fault; its associated risk is: An ISL failure without a correctly operating peer control path can disrupt dual-homed systems and complicate split recovery. The observed case A two-member uplink bundle carries data over only one port because the other side has LACP disabled requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

B:

This alternative concerns vsf member identity and split detection fault; its associated risk is: A failed stack member or split may remove physical access ports and strand endpoints while the logical switch remains partially reachable. The observed case A two-member uplink bundle carries data over only one port because the other side has LACP disabled requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

D:

This alternative concerns trunk allowed vlan and native tag fault detection; its associated risk is: One mismatched trunk can isolate an entire VLAN while other VLANs continue operating normally, obscuring the break. The observed case A two-member uplink bundle carries data over only one port because the other side has LACP disabled requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

Question 443

An HPE Aruba Networking engineer observes: A new cable lands on the wrong distribution switch and the access aggregation fails to form. The corrective solution must keep intended connectivity, segmentation, and operational resilience. What is the most defensible operational action before closing the network change?

  1. Trace the affected VLAN over all inter-switch trunks and reconcile tagged or untagged handling at each hop.
  2. Check authorized DHCP offer path and access-port authentication state when clients cannot obtain usable connectivity.
  3. Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.
  4. Use port operational status, optical diagnostics and CRC or FCS counters to distinguish physical failure from VLAN and routing issues.

Explanation

Correct Answer

C:

The decisive observed condition is: A new cable lands on the wrong distribution switch and the access aggregation fails to form. The appropriate switching action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle. It addresses the risk that a LAG with the wrong partner or member state can behave like a link failure despite all cables showing carrier. Confirm with: Both ends show expected active aggregation members and service survives one physical member shutdown.

Incorrect Answers

A:

This alternative concerns trunk allowed vlan and native tag fault detection; its associated risk is: One mismatched trunk can isolate an entire VLAN while other VLANs continue operating normally, obscuring the break. The observed case A new cable lands on the wrong distribution switch and the access aggregation fails to form requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

B:

This alternative concerns dhcp and wired-authentication first-hop failures; its associated risk is: A blocked DHCP relay or failed RADIUS policy can masquerade as a dead network even though forwarding interfaces remain operational. The observed case A new cable lands on the wrong distribution switch and the access aggregation fails to form requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

D:

This alternative concerns ethernet carrier optic and physical fault isolation; its associated risk is: Repeated CRC errors or light loss can mimic application failures even when the port intermittently reports up. The observed case A new cable lands on the wrong distribution switch and the access aggregation fails to form requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

Question 444

The switch operations team reports: A new cable lands on the wrong distribution switch and the access aggregation fails to form. What adverse switching behavior should the engineer anticipate?

  1. One mismatched trunk can isolate an entire VLAN while other VLANs continue operating normally, obscuring the break.
  2. A blocked DHCP relay or failed RADIUS policy can masquerade as a dead network even though forwarding interfaces remain operational.
  3. A LAG with the wrong partner or member state can behave like a link failure despite all cables showing carrier.
  4. Repeated CRC errors or light loss can mimic application failures even when the port intermittently reports up.

Explanation

Correct Answer

C:

The direct operational failure mode is: A LAG with the wrong partner or member state can behave like a link failure despite all cables showing carrier. It applies to the condition A new cable lands on the wrong distribution switch and the access aggregation fails to form. The suitable corrective action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle. Independently validate using: Both ends show expected active aggregation members and service survives one physical member shutdown.

Incorrect Answers

A:

This alternative concerns trunk allowed vlan and native tag fault detection; its associated risk is: One mismatched trunk can isolate an entire VLAN while other VLANs continue operating normally, obscuring the break. The observed case A new cable lands on the wrong distribution switch and the access aggregation fails to form requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

B:

This alternative concerns dhcp and wired-authentication first-hop failures; its associated risk is: A blocked DHCP relay or failed RADIUS policy can masquerade as a dead network even though forwarding interfaces remain operational. The observed case A new cable lands on the wrong distribution switch and the access aggregation fails to form requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

D:

This alternative concerns ethernet carrier optic and physical fault isolation; its associated risk is: Repeated CRC errors or light loss can mimic application failures even when the port intermittently reports up. The observed case A new cable lands on the wrong distribution switch and the access aggregation fails to form requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

Question 445

An HPE Aruba Networking engineer observes: The operator notices healthy link LEDs but LACP reports different partner system IDs for the two intended members. The corrective solution must keep intended connectivity, segmentation, and operational resilience. Which implementation or troubleshooting step directly resolves the specific network issue?

  1. Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.
  2. Check VSX peer roles, ISL state, separate keepalive and multichassis LAG status when distribution connectivity is asymmetric.
  3. Check authorized DHCP offer path and access-port authentication state when clients cannot obtain usable connectivity.
  4. Inspect MSTP region configuration, root election and per-instance port states to explain blocking or topology churn.

Explanation

Correct Answer

A:

The decisive observed condition is: The operator notices healthy link LEDs but LACP reports different partner system IDs for the two intended members. The appropriate switching action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle. It addresses the risk that a LAG with the wrong partner or member state can behave like a link failure despite all cables showing carrier. Confirm with: Both ends show expected active aggregation members and service survives one physical member shutdown.

Incorrect Answers

B:

This alternative concerns vsx keepalive isl and peer-state fault; its associated risk is: An ISL failure without a correctly operating peer control path can disrupt dual-homed systems and complicate split recovery. The observed case The operator notices healthy link LEDs but LACP reports different partner system IDs for the two intended members requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

C:

This alternative concerns dhcp and wired-authentication first-hop failures; its associated risk is: A blocked DHCP relay or failed RADIUS policy can masquerade as a dead network even though forwarding interfaces remain operational. The observed case The operator notices healthy link LEDs but LACP reports different partner system IDs for the two intended members requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

D:

This alternative concerns spanning tree topology and root inconsistency; its associated risk is: An unexpected root or mismatched region can suppress the intended redundant forwarding path and cause intermittent client connectivity. The observed case The operator notices healthy link LEDs but LACP reports different partner system IDs for the two intended members requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

Question 446

An engineer investigates: The operator notices healthy link LEDs but LACP reports different partner system IDs for the two intended members. Which verification proves the intended operational state rather than just a saved configuration?

  1. A compliant endpoint authenticates into its expected role and receives an authorized lease with correct gateway and DNS.
  2. MSTP state returns to the designed root and port roles after a controlled link-state test.
  3. Both ends show expected active aggregation members and service survives one physical member shutdown.
  4. VSX state, ISL and keepalive show expected health and host traffic remains available after one controlled peer fault.

Explanation

Correct Answer

C:

The independent acceptance evidence for The operator notices healthy link LEDs but LACP reports different partner system IDs for the two intended members is: Both ends show expected active aggregation members and service survives one physical member shutdown. It tests whether the team has actually implemented: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle. An enabled interface or saved configuration by itself is not evidence of complete service recovery.

Incorrect Answers

A:

This alternative concerns dhcp and wired-authentication first-hop failures; its associated risk is: A blocked DHCP relay or failed RADIUS policy can masquerade as a dead network even though forwarding interfaces remain operational. The observed case The operator notices healthy link LEDs but LACP reports different partner system IDs for the two intended members requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

B:

This alternative concerns spanning tree topology and root inconsistency; its associated risk is: An unexpected root or mismatched region can suppress the intended redundant forwarding path and cause intermittent client connectivity. The observed case The operator notices healthy link LEDs but LACP reports different partner system IDs for the two intended members requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

D:

This alternative concerns vsx keepalive isl and peer-state fault; its associated risk is: An ISL failure without a correctly operating peer control path can disrupt dual-homed systems and complicate split recovery. The observed case The operator notices healthy link LEDs but LACP reports different partner system IDs for the two intended members requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

Question 447

An HPE Aruba Networking engineer observes: A network engineer assumes aggregate bandwidth doubles one single TCP flow when the flow is consistently hashed to one link. The corrective solution must keep intended connectivity, segmentation, and operational resilience. Which response best satisfies the technical requirement without disrupting unrelated traffic?

  1. Check authorized DHCP offer path and access-port authentication state when clients cannot obtain usable connectivity.
  2. Trace the affected VLAN over all inter-switch trunks and reconcile tagged or untagged handling at each hop.
  3. Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.
  4. Check VSX peer roles, ISL state, separate keepalive and multichassis LAG status when distribution connectivity is asymmetric.

Explanation

Correct Answer

C:

The decisive observed condition is: A network engineer assumes aggregate bandwidth doubles one single TCP flow when the flow is consistently hashed to one link. The appropriate switching action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle. It addresses the risk that a LAG with the wrong partner or member state can behave like a link failure despite all cables showing carrier. Confirm with: Both ends show expected active aggregation members and service survives one physical member shutdown.

Incorrect Answers

A:

This alternative concerns dhcp and wired-authentication first-hop failures; its associated risk is: A blocked DHCP relay or failed RADIUS policy can masquerade as a dead network even though forwarding interfaces remain operational. The observed case A network engineer assumes aggregate bandwidth doubles one single TCP flow when the flow is consistently hashed to one link requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

B:

This alternative concerns trunk allowed vlan and native tag fault detection; its associated risk is: One mismatched trunk can isolate an entire VLAN while other VLANs continue operating normally, obscuring the break. The observed case A network engineer assumes aggregate bandwidth doubles one single TCP flow when the flow is consistently hashed to one link requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

D:

This alternative concerns vsx keepalive isl and peer-state fault; its associated risk is: An ISL failure without a correctly operating peer control path can disrupt dual-homed systems and complicate split recovery. The observed case A network engineer assumes aggregate bandwidth doubles one single TCP flow when the flow is consistently hashed to one link requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

Question 448

The switch operations team reports: A network engineer assumes aggregate bandwidth doubles one single TCP flow when the flow is consistently hashed to one link. What adverse switching behavior should the engineer anticipate?

  1. A LAG with the wrong partner or member state can behave like a link failure despite all cables showing carrier.
  2. A blocked DHCP relay or failed RADIUS policy can masquerade as a dead network even though forwarding interfaces remain operational.
  3. An ISL failure without a correctly operating peer control path can disrupt dual-homed systems and complicate split recovery.
  4. One mismatched trunk can isolate an entire VLAN while other VLANs continue operating normally, obscuring the break.

Explanation

Correct Answer

A:

The direct operational failure mode is: A LAG with the wrong partner or member state can behave like a link failure despite all cables showing carrier. It applies to the condition A network engineer assumes aggregate bandwidth doubles one single TCP flow when the flow is consistently hashed to one link. The suitable corrective action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle. Independently validate using: Both ends show expected active aggregation members and service survives one physical member shutdown.

Incorrect Answers

B:

This alternative concerns dhcp and wired-authentication first-hop failures; its associated risk is: A blocked DHCP relay or failed RADIUS policy can masquerade as a dead network even though forwarding interfaces remain operational. The observed case A network engineer assumes aggregate bandwidth doubles one single TCP flow when the flow is consistently hashed to one link requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

C:

This alternative concerns vsx keepalive isl and peer-state fault; its associated risk is: An ISL failure without a correctly operating peer control path can disrupt dual-homed systems and complicate split recovery. The observed case A network engineer assumes aggregate bandwidth doubles one single TCP flow when the flow is consistently hashed to one link requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

D:

This alternative concerns trunk allowed vlan and native tag fault detection; its associated risk is: One mismatched trunk can isolate an entire VLAN while other VLANs continue operating normally, obscuring the break. The observed case A network engineer assumes aggregate bandwidth doubles one single TCP flow when the flow is consistently hashed to one link requires the more specific lacp aggregator and individual member failure control. The targeted action is: Compare LACP partner IDs, actor states, member eligibility and upstream wiring to locate a failed or partially formed bundle.

Question 449

An HPE Aruba Networking engineer observes: An access switch becomes root of the campus STP domain after an upstream priority change. The corrective solution must keep intended connectivity, segmentation, and operational resilience. Which change best addresses the observed switching requirement?

  1. Compare a failed endpoint's observed MAC-learning VLAN, access interface membership and IP lease with the expected role.
  2. Trace the affected VLAN over all inter-switch trunks and reconcile tagged or untagged handling at each hop.
  3. Review VSF member status, conductor role, topology and stack link health before treating missing interfaces as VLAN misconfiguration.
  4. Inspect MSTP region configuration, root election and per-instance port states to explain blocking or topology churn.

Explanation

Correct Answer

D:

The decisive observed condition is: An access switch becomes root of the campus STP domain after an upstream priority change. The appropriate switching action is: Inspect MSTP region configuration, root election and per-instance port states to explain blocking or topology churn. It addresses the risk that an unexpected root or mismatched region can suppress the intended redundant forwarding path and cause intermittent client connectivity. Confirm with: MSTP state returns to the designed root and port roles after a controlled link-state test.

Incorrect Answers

A:

This alternative concerns incorrect vlan access assignment identification; its associated risk is: A host in the wrong access VLAN can contact the wrong DHCP scope or become disconnected from its authorized services. The observed case An access switch becomes root of the campus STP domain after an upstream priority change requires the more specific spanning tree topology and root inconsistency control. The targeted action is: Inspect MSTP region configuration, root election and per-instance port states to explain blocking or topology churn.

B:

This alternative concerns trunk allowed vlan and native tag fault detection; its associated risk is: One mismatched trunk can isolate an entire VLAN while other VLANs continue operating normally, obscuring the break. The observed case An access switch becomes root of the campus STP domain after an upstream priority change requires the more specific spanning tree topology and root inconsistency control. The targeted action is: Inspect MSTP region configuration, root election and per-instance port states to explain blocking or topology churn.

C:

This alternative concerns vsf member identity and split detection fault; its associated risk is: A failed stack member or split may remove physical access ports and strand endpoints while the logical switch remains partially reachable. The observed case An access switch becomes root of the campus STP domain after an upstream priority change requires the more specific spanning tree topology and root inconsistency control. The targeted action is: Inspect MSTP region configuration, root election and per-instance port states to explain blocking or topology churn.

Question 450

The HPE AOS-CX switching case is: An access switch becomes root of the campus STP domain after an upstream priority change. Which TWO choices together provide the targeted remedy and independent validation? (Select TWO.)

  1. Trace the affected VLAN over all inter-switch trunks and reconcile tagged or untagged handling at each hop.
  2. Inspect MSTP region configuration, root election and per-instance port states to explain blocking or topology churn.
  3. Compare a failed endpoint's observed MAC-learning VLAN, access interface membership and IP lease with the expected role.
  4. The stack returns to a single intended logical inventory with healthy member ports and validated failover.
  5. MSTP state returns to the designed root and port roles after a controlled link-state test.

Explanation

Correct Answers

B:

The targeted correction for An access switch becomes root of the campus STP domain after an upstream priority change is: Inspect MSTP region configuration, root election and per-instance port states to explain blocking or topology churn. It reduces the risk that an unexpected root or mismatched region can suppress the intended redundant forwarding path and cause intermittent client connectivity.

E:

A separate operational validation for An access switch becomes root of the campus STP domain after an upstream priority change is: MSTP state returns to the designed root and port roles after a controlled link-state test. It proves intended behavior instead of accepting configuration presence alone.

Incorrect Answers

A:

This alternative concerns trunk allowed vlan and native tag fault detection; its associated risk is: One mismatched trunk can isolate an entire VLAN while other VLANs continue operating normally, obscuring the break. The observed case An access switch becomes root of the campus STP domain after an upstream priority change requires the more specific spanning tree topology and root inconsistency control. The targeted action is: Inspect MSTP region configuration, root election and per-instance port states to explain blocking or topology churn.

C:

This alternative concerns incorrect vlan access assignment identification; its associated risk is: A host in the wrong access VLAN can contact the wrong DHCP scope or become disconnected from its authorized services. The observed case An access switch becomes root of the campus STP domain after an upstream priority change requires the more specific spanning tree topology and root inconsistency control. The targeted action is: Inspect MSTP region configuration, root election and per-instance port states to explain blocking or topology churn.

D:

This alternative concerns vsf member identity and split detection fault; its associated risk is: A failed stack member or split may remove physical access ports and strand endpoints while the logical switch remains partially reachable. The observed case An access switch becomes root of the campus STP domain after an upstream priority change requires the more specific spanning tree topology and root inconsistency control. The targeted action is: Inspect MSTP region configuration, root election and per-instance port states to explain blocking or topology churn.