HP HPE7-A08 Practice Test 37

Question 360

An HPE Aruba Networking design review examines: A user host has an IP address in the wrong subnet and cannot reach its gateway. Which technical principle BEST explains the required approach?

OSPF control-plane compatibility differs from simple IP reachability
Endpoint addressing must match its VLAN and gateway network
CRC and physical alarms provide stronger link-health evidence than a lit LED
An operational LAG depends on compatible partner identity and settings

Explanation

Correct Answer

Endpoint addressing must match its VLAN and gateway network. The case therefore calls for this specifically controlled action: identify the host mask and gateway mismatch before changing switch routing. The acceptance evidence is that correcting the endpoint subnet restores gateway reachability.

Incorrect Answers

This principle choice fits a different situation: An OSPF neighbor remains down despite successful ICMP pings between peers. It does not resolve the stated failure mode. For this case, the decisive principle choice is to endpoint addressing must match its VLAN and gateway network.

This principle choice fits a different situation: A fiber connection logs high FCS errors and periodically loses carrier. It does not resolve the stated failure mode. For this case, the decisive principle choice is to endpoint addressing must match its VLAN and gateway network.

This principle choice fits a different situation: A bundle reports suspended members while each individual port appears link-up. It does not resolve the stated failure mode. For this case, the decisive principle choice is to endpoint addressing must match its VLAN and gateway network.

Question 361

A risk review for the following wired-network case asks what should be avoided: A user host has an IP address in the wrong subnet and cannot reach its gateway. Which assumption creates the GREATEST implementation risk?

Disabling all security policy to make one application reachable
Assuming the uplink is healthy for all VLANs because VLAN 10 works
Declaring OSPF healthy because ping to the neighbor IP succeeds
Replacing uplink hardware without checking the incorrect host IP mask

Explanation

Correct Answer

Replacing uplink hardware without checking the incorrect host IP mask. That shortcut fails because endpoint addressing must match its VLAN and gateway network. Instead, the appropriate approach is to identify the host mask and gateway mismatch before changing switch routing.

Incorrect Answers

This misconception choice fits a different situation: Only a restricted subnet is unreachable while all ordinary traffic passes. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to replacing uplink hardware without checking the incorrect host IP mask.

This misconception choice fits a different situation: A printer in VLAN 30 works locally but cannot reach a print server over an uplink. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to replacing uplink hardware without checking the incorrect host IP mask.

This misconception choice fits a different situation: An OSPF neighbor remains down despite successful ICMP pings between peers. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to replacing uplink hardware without checking the incorrect host IP mask.

Question 362

Before changing switch configuration, an engineer investigates: A user host has an IP address in the wrong subnet and cannot reach its gateway. Which FIRST check is most useful for isolating the cause?

Inspect LACP partner state, aggregator key and member operational state
Compare host IP settings, connected VLAN and gateway SVI
Inspect trunk tagging and VLAN membership on the complete path
Inspect optical receive power, FCS counters and the patch path

Explanation

Correct Answer

Compare host IP settings, connected VLAN and gateway SVI. This first check isolates the relevant mechanism without an untested configuration change. It tests the rule that endpoint addressing must match its VLAN and gateway network.

Incorrect Answers

This diagnostic choice fits a different situation: A bundle reports suspended members while each individual port appears link-up. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to compare host IP settings, connected VLAN and gateway SVI.

This diagnostic choice fits a different situation: A printer in VLAN 30 works locally but cannot reach a print server over an uplink. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to compare host IP settings, connected VLAN and gateway SVI.

This diagnostic choice fits a different situation: A fiber connection logs high FCS errors and periodically loses carrier. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to compare host IP settings, connected VLAN and gateway SVI.

Question 363

An implementation change is planned for: A user host has an IP address in the wrong subnet and cannot reach its gateway. Which preventive control BEST reduces unnecessary outage and security risk?

Include per-VLAN uplink tests in deployment acceptance
Require an explicit approval to enable a reserved access interface
Document matched peer configuration before connecting extra members
Capture endpoint and gateway settings before escalation

Explanation

Correct Answer

Capture endpoint and gateway settings before escalation. This safeguard is appropriate before the change to identify the host mask and gateway mismatch before changing switch routing; it reduces exposure to the mistake of replacing uplink hardware without checking the incorrect host IP mask.

Incorrect Answers

This prevention choice fits a different situation: A printer in VLAN 30 works locally but cannot reach a print server over an uplink. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to capture endpoint and gateway settings before escalation.

This prevention choice fits a different situation: An access port shows administratively down even with a working patch cable. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to capture endpoint and gateway settings before escalation.

This prevention choice fits a different situation: A bundle reports suspended members while each individual port appears link-up. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to capture endpoint and gateway settings before escalation.

Question 364

A first repair attempt for this situation failed: A user host has an IP address in the wrong subnet and cannot reach its gateway. The review found the mistaken approach of replacing uplink hardware without checking the incorrect host IP mask. Which targeted recovery action BEST restores the intended design?

Align the OSPF peer parameters and confirm convergence
Restore ISL health and verify peer synchronization before clearing alarms
Correct address assignment or DHCP scope and verify the local route
Repair relay settings or server route and repeat lease acquisition

Explanation

Correct Answer

Correct address assignment or DHCP scope and verify the local route. This addresses the observed risk rather than hiding its symptoms. Confirm the repair when correcting the endpoint subnet restores gateway reachability.

Incorrect Answers

This remediation choice fits a different situation: An OSPF neighbor remains down despite successful ICMP pings between peers. It does not resolve the stated failure mode. For this case, the decisive remediation choice is to correct address assignment or DHCP scope and verify the local route.

This remediation choice fits a different situation: A VSX pair loses downstream LAG forwarding after an ISL interruption. It does not resolve the stated failure mode. For this case, the decisive remediation choice is to correct address assignment or DHCP scope and verify the local route.

This remediation choice fits a different situation: A branch receives no DHCP leases following a routed VLAN migration. It does not resolve the stated failure mode. For this case, the decisive remediation choice is to correct address assignment or DHCP scope and verify the local route.

Question 365

An HPE Aruba Networking engineer faces this wired-network scenario: A printer in VLAN 30 works locally but cannot reach a print server over an uplink. Which implementation action BEST addresses the requirement?

Identify a LACP peer or member consistency issue in the aggregate
Identify likely optic or fiber-layer faults using counters and optical diagnostics
Identify mismatched area, timer, authentication or network settings
Check both ends for an allowed VLAN 30 trunk mismatch

Explanation

Correct Answer

A trunk omission can isolate one VLAN while leaving others operational. The targeted implementation is to check both ends for an allowed VLAN 30 trunk mismatch. The deployment succeeds when the target VLAN appears in effective trunk membership and test packets pass.

Incorrect Answers

This implementation choice fits a different situation: A bundle reports suspended members while each individual port appears link-up. It does not resolve the stated failure mode. For this case, the decisive implementation choice is to check both ends for an allowed VLAN 30 trunk mismatch.

This implementation choice fits a different situation: A fiber connection logs high FCS errors and periodically loses carrier. It does not resolve the stated failure mode. For this case, the decisive implementation choice is to check both ends for an allowed VLAN 30 trunk mismatch.

This implementation choice fits a different situation: An OSPF neighbor remains down despite successful ICMP pings between peers. It does not resolve the stated failure mode. For this case, the decisive implementation choice is to check both ends for an allowed VLAN 30 trunk mismatch.

Question 366

After implementing the approved change — Check both ends for an allowed VLAN 30 trunk mismatch — for this scenario: A printer in VLAN 30 works locally but cannot reach a print server over an uplink. Which observed result BEST verifies the outcome?

The port state changes when deliberately enabled and passes traffic
The target VLAN appears in effective trunk membership and test packets pass
VSX peer health diagnoses the safe failover state under the observed fault
A relayed discovery reaches the authorized server and returns an address

Explanation

Correct Answer

The target VLAN appears in effective trunk membership and test packets pass. This is the observable acceptance evidence for the decision to check both ends for an allowed VLAN 30 trunk mismatch. It demonstrates the principle that a trunk omission can isolate one VLAN while leaving others operational.

Incorrect Answers

This verification choice fits a different situation: An access port shows administratively down even with a working patch cable. It does not resolve the stated failure mode. For this case, the decisive verification choice is to the target VLAN appears in effective trunk membership and test packets pass.

This verification choice fits a different situation: A VSX pair loses downstream LAG forwarding after an ISL interruption. It does not resolve the stated failure mode. For this case, the decisive verification choice is to the target VLAN appears in effective trunk membership and test packets pass.

This verification choice fits a different situation: A branch receives no DHCP leases following a routed VLAN migration. It does not resolve the stated failure mode. For this case, the decisive verification choice is to the target VLAN appears in effective trunk membership and test packets pass.

Question 367

An HPE Aruba Networking design review examines: A printer in VLAN 30 works locally but cannot reach a print server over an uplink. Which technical principle BEST explains the required approach?

VSX peer split handling responds differently to ISL versus keepalive failures
Endpoint addressing must match its VLAN and gateway network
Administrative interface state is distinct from physical link detection
A trunk omission can isolate one VLAN while leaving others operational

Explanation

Correct Answer

A trunk omission can isolate one VLAN while leaving others operational. The case therefore calls for this specifically controlled action: check both ends for an allowed VLAN 30 trunk mismatch. The acceptance evidence is that the target VLAN appears in effective trunk membership and test packets pass.

Incorrect Answers

This principle choice fits a different situation: A VSX pair loses downstream LAG forwarding after an ISL interruption. It does not resolve the stated failure mode. For this case, the decisive principle choice is to a trunk omission can isolate one VLAN while leaving others operational.

This principle choice fits a different situation: A user host has an IP address in the wrong subnet and cannot reach its gateway. It does not resolve the stated failure mode. For this case, the decisive principle choice is to a trunk omission can isolate one VLAN while leaving others operational.

This principle choice fits a different situation: An access port shows administratively down even with a working patch cable. It does not resolve the stated failure mode. For this case, the decisive principle choice is to a trunk omission can isolate one VLAN while leaving others operational.

Question 368

A risk review for the following wired-network case asks what should be avoided: A printer in VLAN 30 works locally but cannot reach a print server over an uplink. Which assumption creates the GREATEST implementation risk?

Disabling all security policy to make one application reachable
Assuming the uplink is healthy for all VLANs because VLAN 10 works
Assuming an ISL outage can never affect VSX multi-chassis forwarding
Assuming physical carrier alone proves successful aggregation

Explanation

Correct Answer

Assuming the uplink is healthy for all VLANs because VLAN 10 works. That shortcut fails because a trunk omission can isolate one VLAN while leaving others operational. Instead, the appropriate approach is to check both ends for an allowed VLAN 30 trunk mismatch.

Incorrect Answers

This misconception choice fits a different situation: Only a restricted subnet is unreachable while all ordinary traffic passes. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to assuming the uplink is healthy for all VLANs because VLAN 10 works.

This misconception choice fits a different situation: A VSX pair loses downstream LAG forwarding after an ISL interruption. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to assuming the uplink is healthy for all VLANs because VLAN 10 works.

This misconception choice fits a different situation: A bundle reports suspended members while each individual port appears link-up. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to assuming the uplink is healthy for all VLANs because VLAN 10 works.

Question 369

Before changing switch configuration, an engineer investigates: A printer in VLAN 30 works locally but cannot reach a print server over an uplink. Which FIRST check is most useful for isolating the cause?

Inspect OSPF interface flags, neighbor messages and authentication
Inspect admin state, link state and recent configuration changes
Inspect optical receive power, FCS counters and the patch path
Inspect trunk tagging and VLAN membership on the complete path

Explanation

Correct Answer

Inspect trunk tagging and VLAN membership on the complete path. This first check isolates the relevant mechanism without an untested configuration change. It tests the rule that a trunk omission can isolate one VLAN while leaving others operational.

Incorrect Answers

This diagnostic choice fits a different situation: An OSPF neighbor remains down despite successful ICMP pings between peers. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect trunk tagging and VLAN membership on the complete path.

This diagnostic choice fits a different situation: An access port shows administratively down even with a working patch cable. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect trunk tagging and VLAN membership on the complete path.

This diagnostic choice fits a different situation: A fiber connection logs high FCS errors and periodically loses carrier. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect trunk tagging and VLAN membership on the complete path.

Question 370

An implementation change is planned for: A printer in VLAN 30 works locally but cannot reach a print server over an uplink. Which preventive control BEST reduces unnecessary outage and security risk?

Document matched peer configuration before connecting extra members
Include per-VLAN uplink tests in deployment acceptance
Test both failure channels independently during commissioning
Use a standardized OSPF peer template with staged adjacency checks

Explanation

Correct Answer

Include per-VLAN uplink tests in deployment acceptance. This safeguard is appropriate before the change to check both ends for an allowed VLAN 30 trunk mismatch; it reduces exposure to the mistake of assuming the uplink is healthy for all VLANs because VLAN 10 works.

Incorrect Answers

This prevention choice fits a different situation: A bundle reports suspended members while each individual port appears link-up. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to include per-VLAN uplink tests in deployment acceptance.

This prevention choice fits a different situation: A VSX pair loses downstream LAG forwarding after an ISL interruption. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to include per-VLAN uplink tests in deployment acceptance.

This prevention choice fits a different situation: An OSPF neighbor remains down despite successful ICMP pings between peers. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to include per-VLAN uplink tests in deployment acceptance.

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Question 360

Explanation

Correct Answer

Incorrect Answers

Question 361

Explanation

Correct Answer

Incorrect Answers

Question 362

Explanation

Correct Answer

Incorrect Answers

Question 363

Explanation

Correct Answer

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Question 364

Explanation

Correct Answer

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Question 365

Explanation

Correct Answer

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Question 366

Explanation

Correct Answer

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Question 367

Explanation

Correct Answer

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Question 368

Explanation

Correct Answer

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Question 369

Explanation

Correct Answer

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Question 370

Explanation

Correct Answer

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HPE Network Switching Professional (HPE7-A08) Practice Tests