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HP HPE7-A01 Practice Test 22

Question 210

A phone connects through a desk switch but the core MAC table keeps pointing its address to an obsolete uplink. Which specific corrective design step best meets the stated campus requirement?

  1. Correct the unwanted Layer 2 forwarding path or mobility condition and let normal address learning converge.
  2. Set a justified port-security limit or approved access policy for the actual endpoint composition without permitting unbounded clients.
  3. Build the supported multichassis LAG consistently on VSX peers and the downstream switch according to the approved topology.
  4. Trust only legitimate server-facing paths while leaving user-facing ports untrusted under the supported snooping policy.

Explanation

Correct Answer

A:

Correct the unwanted Layer 2 forwarding path or mobility condition and let normal address learning converge. Ethernet switches forward based on per-VLAN learned MAC locations; stale or rapidly moving entries can misdirect otherwise valid frames. The proposed configuration targets the stated dependency without broadening unrelated access. The decision applies to the described mac address learning and movement situation.

Incorrect Answers

B:

Set a justified port-security limit or approved access policy for the actual endpoint composition without permitting unbounded clients. This instead concerns port-security mac limits. A MAC limit must reflect legitimate devices and threat policy; increasing it blindly can conceal an unauthorized downstream bridge. It would not implement the specifically required change. The immediate problem concerns mac address learning and movement.

C:

Build the supported multichassis LAG consistently on VSX peers and the downstream switch according to the approved topology. This instead concerns vsx multi-chassis lag. VSX LAG provides a coordinated logical bundle across two control planes; two independent plain LAGs are not a substitute. It would not implement the specifically required change. The immediate problem concerns mac address learning and movement.

D:

Trust only legitimate server-facing paths while leaving user-facing ports untrusted under the supported snooping policy. This instead concerns dhcp snooping trust boundary. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. It would not implement the specifically required change. The immediate problem concerns mac address learning and movement.

Question 211

A phone connects through a desk switch but the core MAC table keeps pointing its address to an obsolete uplink. Following a targeted change, which acceptance test would most directly demonstrate success?

  1. Verify both intended endpoints learn securely and an additional unauthorized MAC still produces the designed violation.
  2. Verify both paths join the same logical LAG and remain usable during a controlled failure of one VSX peer.
  3. Verify an authorized DHCP server delivers leases and an untrusted test offer is discarded with a logged violation.
  4. Verify the correct VLAN and ingress port appear in MAC tables while frames reach the actual device.

Explanation

Correct Answer

D:

Verify the correct VLAN and ingress port appear in MAC tables while frames reach the actual device. Ethernet switches forward based on per-VLAN learned MAC locations; stale or rapidly moving entries can misdirect otherwise valid frames. The result tests actual working behavior, not merely a saved configuration. The decision applies to the described mac address learning and movement situation.

Incorrect Answers

A:

Verify both intended endpoints learn securely and an additional unauthorized MAC still produces the designed violation. This instead concerns port-security mac limits. A MAC limit must reflect legitimate devices and threat policy; increasing it blindly can conceal an unauthorized downstream bridge. It would not establish that this function actually works. The immediate problem concerns mac address learning and movement.

B:

Verify both paths join the same logical LAG and remain usable during a controlled failure of one VSX peer. This instead concerns vsx multi-chassis lag. VSX LAG provides a coordinated logical bundle across two control planes; two independent plain LAGs are not a substitute. It would not establish that this function actually works. The immediate problem concerns mac address learning and movement.

C:

Verify an authorized DHCP server delivers leases and an untrusted test offer is discarded with a logged violation. This instead concerns dhcp snooping trust boundary. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. It would not establish that this function actually works. The immediate problem concerns mac address learning and movement.

Question 212

A phone connects through a desk switch but the core MAC table keeps pointing its address to an obsolete uplink. The change fails acceptance. What is the safest targeted restoration action?

  1. Restore the prior secure profile and connect only the authorized endpoint while reviewing any needed exception.
  2. Return the downstream connection to its last stable LACP design while repairing peer multichassis configuration.
  3. Restore the former forwarding path and clear only affected stale dynamic entries if controlled remediation requires it.
  4. Restore a least-privilege snooping trust policy and remove the rogue server before clearing client leases.

Explanation

Correct Answer

C:

Restore the former forwarding path and clear only affected stale dynamic entries if controlled remediation requires it. Ethernet switches forward based on per-VLAN learned MAC locations; stale or rapidly moving entries can misdirect otherwise valid frames. The focused rollback restores a known safe baseline before another change attempt. The decision applies to the described mac address learning and movement situation.

Incorrect Answers

A:

Restore the prior secure profile and connect only the authorized endpoint while reviewing any needed exception. This instead concerns port-security mac limits. A MAC limit must reflect legitimate devices and threat policy; increasing it blindly can conceal an unauthorized downstream bridge. It would not safely roll back the relevant failed change. The immediate problem concerns mac address learning and movement.

B:

Return the downstream connection to its last stable LACP design while repairing peer multichassis configuration. This instead concerns vsx multi-chassis lag. VSX LAG provides a coordinated logical bundle across two control planes; two independent plain LAGs are not a substitute. It would not safely roll back the relevant failed change. The immediate problem concerns mac address learning and movement.

D:

Restore a least-privilege snooping trust policy and remove the rogue server before clearing client leases. This instead concerns dhcp snooping trust boundary. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. It would not safely roll back the relevant failed change. The immediate problem concerns mac address learning and movement.

Question 213

A user device is repatched between access closets and traffic blackholes while the VLAN's bridge learns conflicting MAC locations. Before implementing a remedy, what should the engineer check first?

  1. Review secure MAC learning, violation counters and the required number of authorized devices on the port.
  2. Review dynamic MAC table age, VLAN context, MAC moves and source-port learning on the affected switches.
  3. Review VSX LAG interface configuration, peer synchronization and downstream LACP partner state.
  4. Review snooping enabled VLANs, trusted-port assignment and DHCP offer source interfaces.

Explanation

Correct Answer

B:

Review dynamic MAC table age, VLAN context, MAC moves and source-port learning on the affected switches. Ethernet switches forward based on per-VLAN learned MAC locations; stale or rapidly moving entries can misdirect otherwise valid frames. The evidence check isolates the relevant prerequisite before a disruptive change. The decision applies to the described mac address learning and movement situation.

Incorrect Answers

A:

Review secure MAC learning, violation counters and the required number of authorized devices on the port. This instead concerns port-security mac limits. A MAC limit must reflect legitimate devices and threat policy; increasing it blindly can conceal an unauthorized downstream bridge. It does not isolate the cause of the stated incident. The immediate problem concerns mac address learning and movement.

C:

Review VSX LAG interface configuration, peer synchronization and downstream LACP partner state. This instead concerns vsx multi-chassis lag. VSX LAG provides a coordinated logical bundle across two control planes; two independent plain LAGs are not a substitute. It does not isolate the cause of the stated incident. The immediate problem concerns mac address learning and movement.

D:

Review snooping enabled VLANs, trusted-port assignment and DHCP offer source interfaces. This instead concerns dhcp snooping trust boundary. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. It does not isolate the cause of the stated incident. The immediate problem concerns mac address learning and movement.

Question 214

A user device is repatched between access closets and traffic blackholes while the VLAN's bridge learns conflicting MAC locations. After the root cause is confirmed, which narrowly scoped configuration action should be selected?

  1. Repair the unwanted Layer 2 forwarding path or mobility condition and let normal address learning converge.
  2. Apply a justified port-security limit or approved access policy for the actual endpoint composition without permitting unbounded clients.
  3. Create the supported multichassis LAG consistently on VSX peers and the downstream switch according to the approved topology.
  4. Trust only legitimate server-facing paths while leaving user-facing ports untrusted under the supported snooping policy for the affected campus deployment.

Explanation

Correct Answer

A:

Repair the unwanted Layer 2 forwarding path or mobility condition and let normal address learning converge. Ethernet switches forward based on per-VLAN learned MAC locations; stale or rapidly moving entries can misdirect otherwise valid frames. The proposed configuration targets the stated dependency without broadening unrelated access. The decision applies to the described mac address learning and movement situation.

Incorrect Answers

B:

Apply a justified port-security limit or approved access policy for the actual endpoint composition without permitting unbounded clients. This instead concerns port-security mac limits. A MAC limit must reflect legitimate devices and threat policy; increasing it blindly can conceal an unauthorized downstream bridge. It would not implement the specifically required change. The immediate problem concerns mac address learning and movement.

C:

Create the supported multichassis LAG consistently on VSX peers and the downstream switch according to the approved topology. This instead concerns vsx multi-chassis lag. VSX LAG provides a coordinated logical bundle across two control planes; two independent plain LAGs are not a substitute. It would not implement the specifically required change. The immediate problem concerns mac address learning and movement.

D:

Trust only legitimate server-facing paths while leaving user-facing ports untrusted under the supported snooping policy for the affected campus deployment. This instead concerns dhcp snooping trust boundary. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. It would not implement the specifically required change. The immediate problem concerns mac address learning and movement.

Question 215

A user device is repatched between access closets and traffic blackholes while the VLAN's bridge learns conflicting MAC locations. The review requires TWO complementary actions: one diagnostic check and one controlled configuration remedy. Select TWO actions that together meet those requirements.

  1. Review secure MAC learning, violation counters and the required number of authorized devices on the port.
  2. Review dynamic MAC table age, VLAN context, MAC moves and source-port learning on the affected switches.
  3. Create the supported multichassis LAG consistently on VSX peers and the downstream switch according to the approved topology.
  4. Repair the unwanted Layer 2 forwarding path or mobility condition and let normal address learning converge.

Explanation

Correct Answers

B:

Review dynamic MAC table age, VLAN context, MAC moves and source-port learning on the affected switches. Ethernet switches forward based on per-VLAN learned MAC locations; stale or rapidly moving entries can misdirect otherwise valid frames. This is the required diagnosis or controlled remedy; the other keyed action supplies the complementary role. The decision applies to the described mac address learning and movement situation.

D:

Repair the unwanted Layer 2 forwarding path or mobility condition and let normal address learning converge. Ethernet switches forward based on per-VLAN learned MAC locations; stale or rapidly moving entries can misdirect otherwise valid frames. This is the required diagnosis or controlled remedy; the other keyed action supplies the complementary role. The decision applies to the described mac address learning and movement situation.

Incorrect Answers

A:

Review secure MAC learning, violation counters and the required number of authorized devices on the port. This instead concerns port-security mac limits. A MAC limit must reflect legitimate devices and threat policy; increasing it blindly can conceal an unauthorized downstream bridge. It is not one of the requested paired diagnosis and configuration actions. The immediate problem concerns mac address learning and movement.

C:

Create the supported multichassis LAG consistently on VSX peers and the downstream switch according to the approved topology. This instead concerns vsx multi-chassis lag. VSX LAG provides a coordinated logical bundle across two control planes; two independent plain LAGs are not a substitute. It is not one of the requested paired diagnosis and configuration actions. The immediate problem concerns mac address learning and movement.

Question 216

A user device is repatched between access closets and traffic blackholes while the VLAN's bridge learns conflicting MAC locations. If the revised setting disrupts users, which controlled rollback would be most relevant?

  1. Reinstate the prior secure profile and connect only the authorized endpoint while reviewing any needed exception.
  2. Return the downstream connection to its last stable LACP design while repairing peer multichassis configuration.
  3. Reinstate the former forwarding path and clear only affected stale dynamic entries if controlled remediation requires it.
  4. Reinstate a least-privilege snooping trust policy and remove the rogue server before clearing client leases.

Explanation

Correct Answer

C:

Reinstate the former forwarding path and clear only affected stale dynamic entries if controlled remediation requires it. Ethernet switches forward based on per-VLAN learned MAC locations; stale or rapidly moving entries can misdirect otherwise valid frames. The focused rollback restores a known safe baseline before another change attempt. The decision applies to the described mac address learning and movement situation.

Incorrect Answers

A:

Reinstate the prior secure profile and connect only the authorized endpoint while reviewing any needed exception. This instead concerns port-security mac limits. A MAC limit must reflect legitimate devices and threat policy; increasing it blindly can conceal an unauthorized downstream bridge. It would not safely roll back the relevant failed change. The immediate problem concerns mac address learning and movement.

B:

Return the downstream connection to its last stable LACP design while repairing peer multichassis configuration. This instead concerns vsx multi-chassis lag. VSX LAG provides a coordinated logical bundle across two control planes; two independent plain LAGs are not a substitute. It would not safely roll back the relevant failed change. The immediate problem concerns mac address learning and movement. For the incident in this item: A user device is repatched between access closets and traffic blackholes while the VLAN's bridge learns conflicting MAC locations.

D:

Reinstate a least-privilege snooping trust policy and remove the rogue server before clearing client leases. This instead concerns dhcp snooping trust boundary. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. It would not safely roll back the relevant failed change. The immediate problem concerns mac address learning and movement.

Question 217

An office desk port permits one endpoint MAC but a connected IP phone and attached PC require two authorized identities. Which investigation would best isolate the immediate network dependency?

  1. Inspect VSX LAG interface configuration, peer synchronization and downstream LACP partner state.
  2. Inspect snooping enabled VLANs, trusted-port assignment and DHCP offer source interfaces.
  3. Inspect secure MAC learning, violation counters and the required number of authorized devices on the port.
  4. Inspect dynamic ARP inspection VLAN scope, DHCP snooping bindings and drop counters for the offending ingress port.

Explanation

Correct Answer

C:

Inspect secure MAC learning, violation counters and the required number of authorized devices on the port. A MAC limit must reflect legitimate devices and threat policy; increasing it blindly can conceal an unauthorized downstream bridge. The evidence check isolates the relevant prerequisite before a disruptive change. The decision applies to the described port-security mac limits situation.

Incorrect Answers

A:

Inspect VSX LAG interface configuration, peer synchronization and downstream LACP partner state. This instead concerns vsx multi-chassis lag. VSX LAG provides a coordinated logical bundle across two control planes; two independent plain LAGs are not a substitute. It does not isolate the cause of the stated incident. The immediate problem concerns port-security mac limits.

B:

Inspect snooping enabled VLANs, trusted-port assignment and DHCP offer source interfaces. This instead concerns dhcp snooping trust boundary. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. It does not isolate the cause of the stated incident. The immediate problem concerns port-security mac limits.

D:

Inspect dynamic ARP inspection VLAN scope, DHCP snooping bindings and drop counters for the offending ingress port. This instead concerns dynamic arp inspection bindings. Dynamic ARP inspection can enforce IP-to-MAC bindings and reduce forged neighbor claims; DHCP snooping alone does not inspect every ARP reply. It does not isolate the cause of the stated incident. The immediate problem concerns port-security mac limits.

Question 218

An office desk port permits one endpoint MAC but a connected IP phone and attached PC require two authorized identities. Which specific corrective design step best meets the stated campus requirement?

  1. Build the supported multichassis LAG consistently on VSX peers and the downstream switch according to the approved topology.
  2. Set a justified port-security limit or approved access policy for the actual endpoint composition without permitting unbounded clients.
  3. Trust only legitimate server-facing paths while leaving user-facing ports untrusted under the supported snooping policy.
  4. Enable validated ARP inspection against trustworthy bindings or supported static exceptions without trusting all client ports.

Explanation

Correct Answer

B:

Set a justified port-security limit or approved access policy for the actual endpoint composition without permitting unbounded clients. A MAC limit must reflect legitimate devices and threat policy; increasing it blindly can conceal an unauthorized downstream bridge. The proposed configuration targets the stated dependency without broadening unrelated access. The decision applies to the described port-security mac limits situation.

Incorrect Answers

A:

Build the supported multichassis LAG consistently on VSX peers and the downstream switch according to the approved topology. This instead concerns vsx multi-chassis lag. VSX LAG provides a coordinated logical bundle across two control planes; two independent plain LAGs are not a substitute. It would not implement the specifically required change. The immediate problem concerns port-security mac limits.

C:

Trust only legitimate server-facing paths while leaving user-facing ports untrusted under the supported snooping policy. This instead concerns dhcp snooping trust boundary. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. It would not implement the specifically required change. The immediate problem concerns port-security mac limits.

D:

Enable validated ARP inspection against trustworthy bindings or supported static exceptions without trusting all client ports. This instead concerns dynamic arp inspection bindings. Dynamic ARP inspection can enforce IP-to-MAC bindings and reduce forged neighbor claims; DHCP snooping alone does not inspect every ARP reply. It would not implement the specifically required change. The immediate problem concerns port-security mac limits.

Question 219

An office desk port permits one endpoint MAC but a connected IP phone and attached PC require two authorized identities. Following a targeted change, which acceptance test would most directly demonstrate success?

  1. Verify both intended endpoints learn securely and an additional unauthorized MAC still produces the designed violation.
  2. Verify both paths join the same logical LAG and remain usable during a controlled failure of one VSX peer.
  3. Verify an authorized DHCP server delivers leases and an untrusted test offer is discarded with a logged violation.
  4. Confirm forged ARP replies are rejected and legitimate bound hosts continue reaching the correct gateway MAC.

Explanation

Correct Answer

A:

Verify both intended endpoints learn securely and an additional unauthorized MAC still produces the designed violation. A MAC limit must reflect legitimate devices and threat policy; increasing it blindly can conceal an unauthorized downstream bridge. The result tests actual working behavior, not merely a saved configuration. The decision applies to the described port-security mac limits situation.

Incorrect Answers

B:

Verify both paths join the same logical LAG and remain usable during a controlled failure of one VSX peer. This instead concerns vsx multi-chassis lag. VSX LAG provides a coordinated logical bundle across two control planes; two independent plain LAGs are not a substitute. It would not establish that this function actually works. The immediate problem concerns port-security mac limits.

C:

Verify an authorized DHCP server delivers leases and an untrusted test offer is discarded with a logged violation. This instead concerns dhcp snooping trust boundary. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. It would not establish that this function actually works. The immediate problem concerns port-security mac limits.

D:

Confirm forged ARP replies are rejected and legitimate bound hosts continue reaching the correct gateway MAC. This instead concerns dynamic arp inspection bindings. Dynamic ARP inspection can enforce IP-to-MAC bindings and reduce forged neighbor claims; DHCP snooping alone does not inspect every ARP reply. It would not establish that this function actually works. The immediate problem concerns port-security mac limits.

Question 220

An office desk port permits one endpoint MAC but a connected IP phone and attached PC require two authorized identities. The change fails acceptance. What is the safest targeted restoration action?

  1. Return the downstream connection to its last stable LACP design while repairing peer multichassis configuration.
  2. Restore a least-privilege snooping trust policy and remove the rogue server before clearing client leases.
  3. Restore valid DHCP bindings or tightly scoped exceptions for affected static devices while keeping spoofed frames blocked.
  4. Restore the prior secure profile and connect only the authorized endpoint while reviewing any needed exception.

Explanation

Correct Answer

D:

Restore the prior secure profile and connect only the authorized endpoint while reviewing any needed exception. A MAC limit must reflect legitimate devices and threat policy; increasing it blindly can conceal an unauthorized downstream bridge. The focused rollback restores a known safe baseline before another change attempt. The decision applies to the described port-security mac limits situation.

Incorrect Answers

A:

Return the downstream connection to its last stable LACP design while repairing peer multichassis configuration. This instead concerns vsx multi-chassis lag. VSX LAG provides a coordinated logical bundle across two control planes; two independent plain LAGs are not a substitute. It would not safely roll back the relevant failed change. The immediate problem concerns port-security mac limits.

B:

Restore a least-privilege snooping trust policy and remove the rogue server before clearing client leases. This instead concerns dhcp snooping trust boundary. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. It would not safely roll back the relevant failed change. The immediate problem concerns port-security mac limits.

C:

Restore valid DHCP bindings or tightly scoped exceptions for affected static devices while keeping spoofed frames blocked. This instead concerns dynamic arp inspection bindings. Dynamic ARP inspection can enforce IP-to-MAC bindings and reduce forged neighbor claims; DHCP snooping alone does not inspect every ARP reply. It would not safely roll back the relevant failed change. The immediate problem concerns port-security mac limits.

HPE Network Campus Access Professional (HPE7-A01) Practice Tests