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HP HPE7-A01 Practice Test 24

Question 230

A campus distribution pair advertises inconsistent LACP partner identity to a downstream switch after VSX LAG membership changes. After the root cause is confirmed, which narrowly scoped configuration action should be selected?

  1. Trust only legitimate server-facing paths while leaving user-facing ports untrusted under the supported snooping policy for the affected campus deployment.
  2. Activate validated ARP inspection against trustworthy bindings or supported static exceptions without trusting all client ports.
  3. Create the supported multichassis LAG consistently on VSX peers and the downstream switch according to the approved topology.
  4. Activate compatible IGMP snooping with a reachable querier and approved multicast groups for the affected segment.

Explanation

Correct Answer

C:

Create the supported multichassis LAG consistently on VSX peers and the downstream switch according to the approved topology. VSX LAG provides a coordinated logical bundle across two control planes; two independent plain LAGs are not a substitute. The proposed configuration targets the stated dependency without broadening unrelated access. The decision applies to the described vsx multi-chassis lag situation.

Incorrect Answers

A:

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 vsx multi-chassis lag.

B:

Activate 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 vsx multi-chassis lag.

D:

Activate compatible IGMP snooping with a reachable querier and approved multicast groups for the affected segment. This instead concerns igmp snooping multicast membership. IGMP snooping constrains multicast delivery based on reported listeners, and a querier maintains membership state over time. It would not implement the specifically required change. The immediate problem concerns vsx multi-chassis lag.

Question 231

A campus distribution pair advertises inconsistent LACP partner identity to a downstream switch after VSX LAG membership changes. A deployment job reports success. Which observed result would actually validate the affected service?

  1. Confirm an authorized DHCP server delivers leases and an untrusted test offer is discarded with a logged violation.
  2. Confirm both paths join the same logical LAG and remain usable during a controlled failure of one VSX peer.
  3. Verify forged ARP replies are rejected and legitimate bound hosts continue reaching the correct gateway MAC.
  4. Confirm only subscribed receiver ports receive the test stream while membership survives the query interval.

Explanation

Correct Answer

B:

Confirm both paths join the same logical LAG and remain usable during a controlled failure of one VSX peer. VSX LAG provides a coordinated logical bundle across two control planes; two independent plain LAGs are not a substitute. The result tests actual working behavior, not merely a saved configuration. The decision applies to the described vsx multi-chassis lag situation.

Incorrect Answers

A:

Confirm 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 vsx multi-chassis lag.

C:

Verify 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 vsx multi-chassis lag.

D:

Confirm only subscribed receiver ports receive the test stream while membership survives the query interval. This instead concerns igmp snooping multicast membership. IGMP snooping constrains multicast delivery based on reported listeners, and a querier maintains membership state over time. It would not establish that this function actually works. The immediate problem concerns vsx multi-chassis lag.

Question 232

A campus distribution pair advertises inconsistent LACP partner identity to a downstream switch after VSX LAG membership changes. If the revised setting disrupts users, which controlled rollback would be most relevant?

  1. Return the downstream connection to its last stable LACP design while repairing peer multichassis configuration.
  2. Reinstate a least-privilege snooping trust policy and remove the rogue server before clearing client leases.
  3. Reinstate valid DHCP bindings or tightly scoped exceptions for affected static devices while keeping spoofed frames blocked.
  4. Reinstate a working querier and last known multicast forwarding configuration to recover legitimate receivers.

Explanation

Correct Answer

A:

Return the downstream connection to its last stable LACP design while repairing peer multichassis configuration. VSX LAG provides a coordinated logical bundle across two control planes; two independent plain LAGs are not a substitute. The focused rollback restores a known safe baseline before another change attempt. The decision applies to the described vsx multi-chassis lag situation. For the incident in this item: A campus distribution pair advertises inconsistent LACP partner identity to a downstream switch after VSX LAG membership changes.

Incorrect Answers

B:

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 vsx multi-chassis lag.

C:

Reinstate 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 vsx multi-chassis lag.

D:

Reinstate a working querier and last known multicast forwarding configuration to recover legitimate receivers. This instead concerns igmp snooping multicast membership. IGMP snooping constrains multicast delivery based on reported listeners, and a querier maintains membership state over time. It would not safely roll back the relevant failed change. The immediate problem concerns vsx multi-chassis lag.

Question 233

A student VLAN receives a DHCP offer from a rogue classroom router because the client-facing switchport is accidentally trusted. Which investigation would best isolate the immediate network dependency?

  1. Inspect snooping enabled VLANs, trusted-port assignment and DHCP offer source interfaces.
  2. Inspect dynamic ARP inspection VLAN scope, DHCP snooping bindings and drop counters for the offending ingress port.
  3. Inspect IGMP querier availability, learned group memberships and multicast forwarding ports on the VLAN.
  4. Inspect interface and path MTUs, oversized drop counters and ICMP packet-too-big handling.

Explanation

Correct Answer

A:

Inspect snooping enabled VLANs, trusted-port assignment and DHCP offer source interfaces. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. The evidence check isolates the relevant prerequisite before a disruptive change. The decision applies to the described dhcp snooping trust boundary situation.

Incorrect Answers

B:

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 dhcp snooping trust boundary.

C:

Inspect IGMP querier availability, learned group memberships and multicast forwarding ports on the VLAN. This instead concerns igmp snooping multicast membership. IGMP snooping constrains multicast delivery based on reported listeners, and a querier maintains membership state over time. It does not isolate the cause of the stated incident. The immediate problem concerns dhcp snooping trust boundary.

D:

Inspect interface and path MTUs, oversized drop counters and ICMP packet-too-big handling. This instead concerns mtu mismatch in a campus path. A single low-MTU hop can disrupt large packets even while small connectivity probes succeed; end-to-end sizing matters. It does not isolate the cause of the stated incident. The immediate problem concerns dhcp snooping trust boundary.

Question 234

A student VLAN receives a DHCP offer from a rogue classroom router because the client-facing switchport is accidentally trusted. Which specific corrective design step best meets the stated campus requirement?

  1. Enable validated ARP inspection against trustworthy bindings or supported static exceptions without trusting all client ports.
  2. Enable compatible IGMP snooping with a reachable querier and approved multicast groups for the affected segment.
  3. Set compatible MTU on each required link and routed path while respecting device and application limits.
  4. Trust only legitimate server-facing paths while leaving user-facing ports untrusted under the supported snooping policy.

Explanation

Correct Answer

D:

Trust only legitimate server-facing paths while leaving user-facing ports untrusted under the supported snooping policy. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. The proposed configuration targets the stated dependency without broadening unrelated access. The decision applies to the described dhcp snooping trust boundary situation.

Incorrect Answers

A:

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 dhcp snooping trust boundary.

B:

Enable compatible IGMP snooping with a reachable querier and approved multicast groups for the affected segment. This instead concerns igmp snooping multicast membership. IGMP snooping constrains multicast delivery based on reported listeners, and a querier maintains membership state over time. It would not implement the specifically required change. The immediate problem concerns dhcp snooping trust boundary.

C:

Set compatible MTU on each required link and routed path while respecting device and application limits. This instead concerns mtu mismatch in a campus path. A single low-MTU hop can disrupt large packets even while small connectivity probes succeed; end-to-end sizing matters. It would not implement the specifically required change. The immediate problem concerns dhcp snooping trust boundary.

Question 235

A student VLAN receives a DHCP offer from a rogue classroom router because the client-facing switchport is accidentally trusted. Following a targeted change, which acceptance test would most directly demonstrate success?

  1. Confirm forged ARP replies are rejected and legitimate bound hosts continue reaching the correct gateway MAC.
  2. Verify only subscribed receiver ports receive the test stream while membership survives the query interval.
  3. Verify an authorized DHCP server delivers leases and an untrusted test offer is discarded with a logged violation.
  4. Test payloads near the intended path size and confirm large frames pass without fragmentation-related loss.

Explanation

Correct Answer

C:

Verify an authorized DHCP server delivers leases and an untrusted test offer is discarded with a logged violation. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. The result tests actual working behavior, not merely a saved configuration. The decision applies to the described dhcp snooping trust boundary situation.

Incorrect Answers

A:

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 dhcp snooping trust boundary.

B:

Verify only subscribed receiver ports receive the test stream while membership survives the query interval. This instead concerns igmp snooping multicast membership. IGMP snooping constrains multicast delivery based on reported listeners, and a querier maintains membership state over time. It would not establish that this function actually works. The immediate problem concerns dhcp snooping trust boundary.

D:

Test payloads near the intended path size and confirm large frames pass without fragmentation-related loss. This instead concerns mtu mismatch in a campus path. A single low-MTU hop can disrupt large packets even while small connectivity probes succeed; end-to-end sizing matters. It would not establish that this function actually works. The immediate problem concerns dhcp snooping trust boundary.

Question 236

A student VLAN receives a DHCP offer from a rogue classroom router because the client-facing switchport is accidentally trusted. The change fails acceptance. What is the safest targeted restoration action?

  1. Restore valid DHCP bindings or tightly scoped exceptions for affected static devices while keeping spoofed frames blocked.
  2. Restore a least-privilege snooping trust policy and remove the rogue server before clearing client leases.
  3. Restore a working querier and last known multicast forwarding configuration to recover legitimate receivers.
  4. Restore the previously working end-to-end MTU and revert the isolated change if large traffic still fails.

Explanation

Correct Answer

B:

Restore a least-privilege snooping trust policy and remove the rogue server before clearing client leases. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. The focused rollback restores a known safe baseline before another change attempt. The decision applies to the described dhcp snooping trust boundary situation.

Incorrect Answers

A:

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 dhcp snooping trust boundary.

C:

Restore a working querier and last known multicast forwarding configuration to recover legitimate receivers. This instead concerns igmp snooping multicast membership. IGMP snooping constrains multicast delivery based on reported listeners, and a querier maintains membership state over time. It would not safely roll back the relevant failed change. The immediate problem concerns dhcp snooping trust boundary.

D:

Restore the previously working end-to-end MTU and revert the isolated change if large traffic still fails. This instead concerns mtu mismatch in a campus path. A single low-MTU hop can disrupt large packets even while small connectivity probes succeed; end-to-end sizing matters. It would not safely roll back the relevant failed change. The immediate problem concerns dhcp snooping trust boundary.

Question 237

A campus access layer allows an unauthorized mini-router to distribute leases after DHCP snooping trust was enabled on every port. Before implementing a remedy, what should the engineer check first?

  1. Review snooping enabled VLANs, trusted-port assignment and DHCP offer source interfaces.
  2. Review dynamic ARP inspection VLAN scope, DHCP snooping bindings and drop counters for the offending ingress port.
  3. Review IGMP querier availability, learned group memberships and multicast forwarding ports on the VLAN.
  4. Review interface and path MTUs, oversized drop counters and ICMP packet-too-big handling.

Explanation

Correct Answer

A:

Review snooping enabled VLANs, trusted-port assignment and DHCP offer source interfaces. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. The evidence check isolates the relevant prerequisite before a disruptive change. The decision applies to the described dhcp snooping trust boundary situation.

Incorrect Answers

B:

Review 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 dhcp snooping trust boundary.

C:

Review IGMP querier availability, learned group memberships and multicast forwarding ports on the VLAN. This instead concerns igmp snooping multicast membership. IGMP snooping constrains multicast delivery based on reported listeners, and a querier maintains membership state over time. It does not isolate the cause of the stated incident. The immediate problem concerns dhcp snooping trust boundary.

D:

Review interface and path MTUs, oversized drop counters and ICMP packet-too-big handling. This instead concerns mtu mismatch in a campus path. A single low-MTU hop can disrupt large packets even while small connectivity probes succeed; end-to-end sizing matters. It does not isolate the cause of the stated incident. The immediate problem concerns dhcp snooping trust boundary.

Question 238

A campus access layer allows an unauthorized mini-router to distribute leases after DHCP snooping trust was enabled on every port. After the root cause is confirmed, which narrowly scoped configuration action should be selected?

  1. Activate validated ARP inspection against trustworthy bindings or supported static exceptions without trusting all client ports.
  2. Activate compatible IGMP snooping with a reachable querier and approved multicast groups for the affected segment.
  3. Apply compatible MTU on each required link and routed path while respecting device and application limits.
  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

D:

Trust only legitimate server-facing paths while leaving user-facing ports untrusted under the supported snooping policy for the affected campus deployment. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. The proposed configuration targets the stated dependency without broadening unrelated access. The decision applies to the described dhcp snooping trust boundary situation.

Incorrect Answers

A:

Activate 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 dhcp snooping trust boundary.

B:

Activate compatible IGMP snooping with a reachable querier and approved multicast groups for the affected segment. This instead concerns igmp snooping multicast membership. IGMP snooping constrains multicast delivery based on reported listeners, and a querier maintains membership state over time. It would not implement the specifically required change. The immediate problem concerns dhcp snooping trust boundary.

C:

Apply compatible MTU on each required link and routed path while respecting device and application limits. This instead concerns mtu mismatch in a campus path. A single low-MTU hop can disrupt large packets even while small connectivity probes succeed; end-to-end sizing matters. It would not implement the specifically required change. The immediate problem concerns dhcp snooping trust boundary.

Question 239

A campus access layer allows an unauthorized mini-router to distribute leases after DHCP snooping trust was enabled on every port. A deployment job reports success. Which observed result would actually validate the affected service?

  1. Verify forged ARP replies are rejected and legitimate bound hosts continue reaching the correct gateway MAC.
  2. Confirm only subscribed receiver ports receive the test stream while membership survives the query interval.
  3. Confirm an authorized DHCP server delivers leases and an untrusted test offer is discarded with a logged violation.
  4. Exercise payloads near the intended path size and confirm large frames pass without fragmentation-related loss.

Explanation

Correct Answer

C:

Confirm an authorized DHCP server delivers leases and an untrusted test offer is discarded with a logged violation. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. The result tests actual working behavior, not merely a saved configuration. The decision applies to the described dhcp snooping trust boundary situation.

Incorrect Answers

A:

Verify 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 dhcp snooping trust boundary.

B:

Confirm only subscribed receiver ports receive the test stream while membership survives the query interval. This instead concerns igmp snooping multicast membership. IGMP snooping constrains multicast delivery based on reported listeners, and a querier maintains membership state over time. It would not establish that this function actually works. The immediate problem concerns dhcp snooping trust boundary.

D:

Exercise payloads near the intended path size and confirm large frames pass without fragmentation-related loss. This instead concerns mtu mismatch in a campus path. A single low-MTU hop can disrupt large packets even while small connectivity probes succeed; end-to-end sizing matters. It would not establish that this function actually works. The immediate problem concerns dhcp snooping trust boundary.

Question 240

A campus access layer allows an unauthorized mini-router to distribute leases after DHCP snooping trust was enabled on every port. The review requires TWO complementary actions: one diagnostic check and one controlled configuration remedy. Select TWO actions that together meet those requirements.

  1. Review dynamic ARP inspection VLAN scope, DHCP snooping bindings and drop counters for the offending ingress port.
  2. Review snooping enabled VLANs, trusted-port assignment and DHCP offer source interfaces.
  3. Activate compatible IGMP snooping with a reachable querier and approved multicast groups for the affected segment.
  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 Answers

B:

Review snooping enabled VLANs, trusted-port assignment and DHCP offer source interfaces. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. This is the required diagnosis or controlled remedy; the other keyed action supplies the complementary role. The decision applies to the described dhcp snooping trust boundary situation.

D:

Trust only legitimate server-facing paths while leaving user-facing ports untrusted under the supported snooping policy for the affected campus deployment. DHCP snooping relies on a precise trust boundary; trusting a client port permits unauthorized DHCP servers to inject offers. This is the required diagnosis or controlled remedy; the other keyed action supplies the complementary role. The decision applies to the described dhcp snooping trust boundary situation.

Incorrect Answers

A:

Review 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 is not one of the requested paired diagnosis and configuration actions. The immediate problem concerns dhcp snooping trust boundary.

C:

Activate compatible IGMP snooping with a reachable querier and approved multicast groups for the affected segment. This instead concerns igmp snooping multicast membership. IGMP snooping constrains multicast delivery based on reported listeners, and a querier maintains membership state over time. It is not one of the requested paired diagnosis and configuration actions. The immediate problem concerns dhcp snooping trust boundary.

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