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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 50

Question 490

The HPE AOS-CX switching case is: A network team declares a cable fixed even though FCS counters continue rising on the same interface. Which TWO choices together provide the targeted remedy and independent validation? (Select TWO.)

  1. Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.
  2. Separate IGMP snooping, querier state, PIM neighbor and RPF checks to find multicast loss at its real layer.
  3. A documented test sequence localizes the first failed hop and confirms recovery without broad unapproved changes.
  4. Inspect classification, queue occupancy, drops and congestion points before tuning DSCP, shaping or scheduling policies.
  5. A before/after event timeline and counters show the original fault stopped with no unexpected new alerts.

Explanation

Correct Answers

A:

The targeted correction for A network team declares a cable fixed even though FCS counters continue rising on the same interface is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols. It reduces the risk that a remediation based on uncorrelated symptoms can fix a side effect while the actual trigger remains active.

E:

A separate operational validation for A network team declares a cable fixed even though FCS counters continue rising on the same interface is: A before/after event timeline and counters show the original fault stopped with no unexpected new alerts. It proves intended behavior instead of accepting configuration presence alone.

Incorrect Answers

B:

This alternative concerns multicast join and routed multicast fault recovery; its associated risk is: Enabling more multicast flooding without diagnosis can overload unrelated VLANs and still fail inter-subnet delivery. The observed case A network team declares a cable fixed even though FCS counters continue rising on the same interface requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

C:

This alternative concerns structured fault isolation from endpoint to core; its associated risk is: Changing unrelated switching settings before locating the break can introduce secondary outages and destroy useful evidence. The observed case A network team declares a cable fixed even though FCS counters continue rising on the same interface requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

D:

This alternative concerns qos congestion remediation using actual queue telemetry; its associated risk is: Changing priority globally based on one poor call can starve critical classes or fail to address an undersized physical uplink. The observed case A network team declares a cable fixed even though FCS counters continue rising on the same interface requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

Question 491

An HPE Aruba Networking engineer observes: A switch upgrade precedes repeated VSF topology transitions but the investigation ignores change timestamps. The corrective solution must keep intended connectivity, segmentation, and operational resilience. What is the most defensible operational action before closing the network change?

  1. Resolve blocked wired devices by reviewing RADIUS status, assigned roles, MAC authorization and policy logs without bypassing security wholesale.
  2. Separate IGMP snooping, querier state, PIM neighbor and RPF checks to find multicast loss at its real layer.
  3. Compare intended configuration, startup state, Central templates and recent changes before restoring only the approved affected scope.
  4. Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

Explanation

Correct Answer

D:

The decisive observed condition is: A switch upgrade precedes repeated VSF topology transitions but the investigation ignores change timestamps. The appropriate switching action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols. It addresses the risk that a remediation based on uncorrelated symptoms can fix a side effect while the actual trigger remains active. Confirm with: A before/after event timeline and counters show the original fault stopped with no unexpected new alerts.

Incorrect Answers

A:

This alternative concerns port security and aaa fault remediation; its associated risk is: Disabling authentication for an entire building may restore connectivity while exposing unauthorized access to enterprise VLANs. The observed case A switch upgrade precedes repeated VSF topology transitions but the investigation ignores change timestamps requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

B:

This alternative concerns multicast join and routed multicast fault recovery; its associated risk is: Enabling more multicast flooding without diagnosis can overload unrelated VLANs and still fail inter-subnet delivery. The observed case A switch upgrade precedes repeated VSF topology transitions but the investigation ignores change timestamps requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

C:

This alternative concerns configuration drift and restore after an outage; its associated risk is: Blind restoration from a stale backup may overwrite healthy newer policies and leave a hidden repeat-failure trigger. The observed case A switch upgrade precedes repeated VSF topology transitions but the investigation ignores change timestamps requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

Question 492

The switch operations team reports: A switch upgrade precedes repeated VSF topology transitions but the investigation ignores change timestamps. What is the most relevant operational exposure in this switching scenario?

  1. Blind restoration from a stale backup may overwrite healthy newer policies and leave a hidden repeat-failure trigger.
  2. Disabling authentication for an entire building may restore connectivity while exposing unauthorized access to enterprise VLANs.
  3. A remediation based on uncorrelated symptoms can fix a side effect while the actual trigger remains active.
  4. Enabling more multicast flooding without diagnosis can overload unrelated VLANs and still fail inter-subnet delivery.

Explanation

Correct Answer

C:

The direct operational failure mode is: A remediation based on uncorrelated symptoms can fix a side effect while the actual trigger remains active. It applies to the condition A switch upgrade precedes repeated VSF topology transitions but the investigation ignores change timestamps. The suitable corrective action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols. Independently validate using: A before/after event timeline and counters show the original fault stopped with no unexpected new alerts.

Incorrect Answers

A:

This alternative concerns configuration drift and restore after an outage; its associated risk is: Blind restoration from a stale backup may overwrite healthy newer policies and leave a hidden repeat-failure trigger. The observed case A switch upgrade precedes repeated VSF topology transitions but the investigation ignores change timestamps requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

B:

This alternative concerns port security and aaa fault remediation; its associated risk is: Disabling authentication for an entire building may restore connectivity while exposing unauthorized access to enterprise VLANs. The observed case A switch upgrade precedes repeated VSF topology transitions but the investigation ignores change timestamps requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

D:

This alternative concerns multicast join and routed multicast fault recovery; its associated risk is: Enabling more multicast flooding without diagnosis can overload unrelated VLANs and still fail inter-subnet delivery. The observed case A switch upgrade precedes repeated VSF topology transitions but the investigation ignores change timestamps requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

Question 493

An HPE Aruba Networking engineer observes: A dashboard displays historical congestion from yesterday as if it were the current root cause. The corrective solution must keep intended connectivity, segmentation, and operational resilience. Which implementation or troubleshooting step directly resolves the specific network issue?

  1. Compare intended configuration, startup state, Central templates and recent changes before restoring only the approved affected scope.
  2. Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.
  3. Resolve blocked wired devices by reviewing RADIUS status, assigned roles, MAC authorization and policy logs without bypassing security wholesale.
  4. Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

Explanation

Correct Answer

D:

The decisive observed condition is: A dashboard displays historical congestion from yesterday as if it were the current root cause. The appropriate switching action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols. It addresses the risk that a remediation based on uncorrelated symptoms can fix a side effect while the actual trigger remains active. Confirm with: A before/after event timeline and counters show the original fault stopped with no unexpected new alerts.

Incorrect Answers

A:

This alternative concerns configuration drift and restore after an outage; its associated risk is: Blind restoration from a stale backup may overwrite healthy newer policies and leave a hidden repeat-failure trigger. The observed case A dashboard displays historical congestion from yesterday as if it were the current root cause requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

B:

This alternative concerns routed-path recovery and ospf/bgp neighbor remediation; its associated risk is: Adding arbitrary static routes can hide an OSPF or BGP configuration defect and later cause asymmetric return traffic. The observed case A dashboard displays historical congestion from yesterday as if it were the current root cause requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

C:

This alternative concerns port security and aaa fault remediation; its associated risk is: Disabling authentication for an entire building may restore connectivity while exposing unauthorized access to enterprise VLANs. The observed case A dashboard displays historical congestion from yesterday as if it were the current root cause requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

Question 494

An engineer investigates: A dashboard displays historical congestion from yesterday as if it were the current root cause. Which test would independently confirm expected switch behavior?

  1. A reconciled configuration diff and focused service tests prove only intended changes were recovered and recorded.
  2. A before/after event timeline and counters show the original fault stopped with no unexpected new alerts.
  3. The neighbor reaches its designed state, intended routes appear in the correct VRF and bidirectional probes succeed.
  4. A known valid device connects with its approved role while an unknown MAC is still denied or quarantined.

Explanation

Correct Answer

B:

The independent acceptance evidence for A dashboard displays historical congestion from yesterday as if it were the current root cause is: A before/after event timeline and counters show the original fault stopped with no unexpected new alerts. It tests whether the team has actually implemented: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols. An enabled interface or saved configuration by itself is not evidence of complete service recovery.

Incorrect Answers

A:

This alternative concerns configuration drift and restore after an outage; its associated risk is: Blind restoration from a stale backup may overwrite healthy newer policies and leave a hidden repeat-failure trigger. The observed case A dashboard displays historical congestion from yesterday as if it were the current root cause requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

C:

This alternative concerns routed-path recovery and ospf/bgp neighbor remediation; its associated risk is: Adding arbitrary static routes can hide an OSPF or BGP configuration defect and later cause asymmetric return traffic. The observed case A dashboard displays historical congestion from yesterday as if it were the current root cause requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

D:

This alternative concerns port security and aaa fault remediation; its associated risk is: Disabling authentication for an entire building may restore connectivity while exposing unauthorized access to enterprise VLANs. The observed case A dashboard displays historical congestion from yesterday as if it were the current root cause requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

Question 495

An HPE Aruba Networking engineer observes: A technician restarts an entire switch despite syslog identifying a single port authentication failure. The corrective solution must keep intended connectivity, segmentation, and operational resilience. Which response best satisfies the technical requirement without disrupting unrelated traffic?

  1. Inspect classification, queue occupancy, drops and congestion points before tuning DSCP, shaping or scheduling policies.
  2. Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.
  3. Recover missing VSF members using supported identity, link, conductor and software checks rather than resetting the logical stack without evidence.
  4. Separate IGMP snooping, querier state, PIM neighbor and RPF checks to find multicast loss at its real layer.

Explanation

Correct Answer

B:

The decisive observed condition is: A technician restarts an entire switch despite syslog identifying a single port authentication failure. The appropriate switching action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols. It addresses the risk that a remediation based on uncorrelated symptoms can fix a side effect while the actual trigger remains active. Confirm with: A before/after event timeline and counters show the original fault stopped with no unexpected new alerts.

Incorrect Answers

A:

This alternative concerns qos congestion remediation using actual queue telemetry; its associated risk is: Changing priority globally based on one poor call can starve critical classes or fail to address an undersized physical uplink. The observed case A technician restarts an entire switch despite syslog identifying a single port authentication failure requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

C:

This alternative concerns vsf membership and conductor recovery plan; its associated risk is: Unplanned zeroization or member readdition can erase interface configuration and extend an access outage. The observed case A technician restarts an entire switch despite syslog identifying a single port authentication failure requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

D:

This alternative concerns multicast join and routed multicast fault recovery; its associated risk is: Enabling more multicast flooding without diagnosis can overload unrelated VLANs and still fail inter-subnet delivery. The observed case A technician restarts an entire switch despite syslog identifying a single port authentication failure requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

Question 496

The switch operations team reports: A technician restarts an entire switch despite syslog identifying a single port authentication failure. What is the most relevant operational exposure in this switching scenario?

  1. Changing priority globally based on one poor call can starve critical classes or fail to address an undersized physical uplink.
  2. A remediation based on uncorrelated symptoms can fix a side effect while the actual trigger remains active.
  3. Unplanned zeroization or member readdition can erase interface configuration and extend an access outage.
  4. Enabling more multicast flooding without diagnosis can overload unrelated VLANs and still fail inter-subnet delivery.

Explanation

Correct Answer

B:

The direct operational failure mode is: A remediation based on uncorrelated symptoms can fix a side effect while the actual trigger remains active. It applies to the condition A technician restarts an entire switch despite syslog identifying a single port authentication failure. The suitable corrective action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols. Independently validate using: A before/after event timeline and counters show the original fault stopped with no unexpected new alerts.

Incorrect Answers

A:

This alternative concerns qos congestion remediation using actual queue telemetry; its associated risk is: Changing priority globally based on one poor call can starve critical classes or fail to address an undersized physical uplink. The observed case A technician restarts an entire switch despite syslog identifying a single port authentication failure requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

C:

This alternative concerns vsf membership and conductor recovery plan; its associated risk is: Unplanned zeroization or member readdition can erase interface configuration and extend an access outage. The observed case A technician restarts an entire switch despite syslog identifying a single port authentication failure requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

D:

This alternative concerns multicast join and routed multicast fault recovery; its associated risk is: Enabling more multicast flooding without diagnosis can overload unrelated VLANs and still fail inter-subnet delivery. The observed case A technician restarts an entire switch despite syslog identifying a single port authentication failure requires the more specific logs event timeline and interface counters remediation control. The targeted action is: Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.

Question 497

An HPE Aruba Networking engineer observes: An OSPF link stays down because its peers use mismatched areas while technicians repeatedly replace fiber optics. The corrective solution must keep intended connectivity, segmentation, and operational resilience. Which change best addresses the observed switching requirement?

  1. Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.
  2. Separate IGMP snooping, querier state, PIM neighbor and RPF checks to find multicast loss at its real layer.
  3. Correlate time-synchronized switch logs, counters and recent configuration changes before replacing hardware or changing protocols.
  4. Resolve blocked wired devices by reviewing RADIUS status, assigned roles, MAC authorization and policy logs without bypassing security wholesale.

Explanation

Correct Answer

A:

The decisive observed condition is: An OSPF link stays down because its peers use mismatched areas while technicians repeatedly replace fiber optics. The appropriate switching action is: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix. It addresses the risk that adding arbitrary static routes can hide an OSPF or BGP configuration defect and later cause asymmetric return traffic. Confirm with: The neighbor reaches its designed state, intended routes appear in the correct VRF and bidirectional probes succeed.

Incorrect Answers

B:

This alternative concerns multicast join and routed multicast fault recovery; its associated risk is: Enabling more multicast flooding without diagnosis can overload unrelated VLANs and still fail inter-subnet delivery. The observed case An OSPF link stays down because its peers use mismatched areas while technicians repeatedly replace fiber optics requires the more specific routed-path recovery and ospf/bgp neighbor remediation control. The targeted action is: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.

C:

This alternative concerns logs event timeline and interface counters remediation; its associated risk is: A remediation based on uncorrelated symptoms can fix a side effect while the actual trigger remains active. The observed case An OSPF link stays down because its peers use mismatched areas while technicians repeatedly replace fiber optics requires the more specific routed-path recovery and ospf/bgp neighbor remediation control. The targeted action is: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.

D:

This alternative concerns port security and aaa fault remediation; its associated risk is: Disabling authentication for an entire building may restore connectivity while exposing unauthorized access to enterprise VLANs. The observed case An OSPF link stays down because its peers use mismatched areas while technicians repeatedly replace fiber optics requires the more specific routed-path recovery and ospf/bgp neighbor remediation control. The targeted action is: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.

Question 498

An engineer investigates: An OSPF link stays down because its peers use mismatched areas while technicians repeatedly replace fiber optics. What network observation should the team require before approving completion?

  1. A known receiver gets the stream and unsubscribed ports remain protected after the correct membership or routing fix.
  2. The neighbor reaches its designed state, intended routes appear in the correct VRF and bidirectional probes succeed.
  3. A known valid device connects with its approved role while an unknown MAC is still denied or quarantined.
  4. A before/after event timeline and counters show the original fault stopped with no unexpected new alerts.

Explanation

Correct Answer

B:

The independent acceptance evidence for An OSPF link stays down because its peers use mismatched areas while technicians repeatedly replace fiber optics is: The neighbor reaches its designed state, intended routes appear in the correct VRF and bidirectional probes succeed. It tests whether the team has actually implemented: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix. An enabled interface or saved configuration by itself is not evidence of complete service recovery.

Incorrect Answers

A:

This alternative concerns multicast join and routed multicast fault recovery; its associated risk is: Enabling more multicast flooding without diagnosis can overload unrelated VLANs and still fail inter-subnet delivery. The observed case An OSPF link stays down because its peers use mismatched areas while technicians repeatedly replace fiber optics requires the more specific routed-path recovery and ospf/bgp neighbor remediation control. The targeted action is: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.

C:

This alternative concerns port security and aaa fault remediation; its associated risk is: Disabling authentication for an entire building may restore connectivity while exposing unauthorized access to enterprise VLANs. The observed case An OSPF link stays down because its peers use mismatched areas while technicians repeatedly replace fiber optics requires the more specific routed-path recovery and ospf/bgp neighbor remediation control. The targeted action is: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.

D:

This alternative concerns logs event timeline and interface counters remediation; its associated risk is: A remediation based on uncorrelated symptoms can fix a side effect while the actual trigger remains active. The observed case An OSPF link stays down because its peers use mismatched areas while technicians repeatedly replace fiber optics requires the more specific routed-path recovery and ospf/bgp neighbor remediation control. The targeted action is: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.

Question 499

An HPE Aruba Networking engineer observes: A BGP session is established but a route filter denies every prefix required for the new branch. The corrective solution must keep intended connectivity, segmentation, and operational resilience. What is the most defensible operational action before closing the network change?

  1. Inspect classification, queue occupancy, drops and congestion points before tuning DSCP, shaping or scheduling policies.
  2. Separate IGMP snooping, querier state, PIM neighbor and RPF checks to find multicast loss at its real layer.
  3. Compare intended configuration, startup state, Central templates and recent changes before restoring only the approved affected scope.
  4. Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.

Explanation

Correct Answer

D:

The decisive observed condition is: A BGP session is established but a route filter denies every prefix required for the new branch. The appropriate switching action is: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix. It addresses the risk that adding arbitrary static routes can hide an OSPF or BGP configuration defect and later cause asymmetric return traffic. Confirm with: The neighbor reaches its designed state, intended routes appear in the correct VRF and bidirectional probes succeed.

Incorrect Answers

A:

This alternative concerns qos congestion remediation using actual queue telemetry; its associated risk is: Changing priority globally based on one poor call can starve critical classes or fail to address an undersized physical uplink. The observed case A BGP session is established but a route filter denies every prefix required for the new branch requires the more specific routed-path recovery and ospf/bgp neighbor remediation control. The targeted action is: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.

B:

This alternative concerns multicast join and routed multicast fault recovery; its associated risk is: Enabling more multicast flooding without diagnosis can overload unrelated VLANs and still fail inter-subnet delivery. The observed case A BGP session is established but a route filter denies every prefix required for the new branch requires the more specific routed-path recovery and ospf/bgp neighbor remediation control. The targeted action is: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.

C:

This alternative concerns configuration drift and restore after an outage; its associated risk is: Blind restoration from a stale backup may overwrite healthy newer policies and leave a hidden repeat-failure trigger. The observed case A BGP session is established but a route filter denies every prefix required for the new branch requires the more specific routed-path recovery and ospf/bgp neighbor remediation control. The targeted action is: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.

Question 500

The HPE AOS-CX switching case is: A BGP session is established but a route filter denies every prefix required for the new branch. Select TWO: a corrective switching action and separate evidence that the correction worked. (Select TWO.)

  1. A reconciled configuration diff and focused service tests prove only intended changes were recovered and recorded.
  2. Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.
  3. The neighbor reaches its designed state, intended routes appear in the correct VRF and bidirectional probes succeed.
  4. Inspect classification, queue occupancy, drops and congestion points before tuning DSCP, shaping or scheduling policies.
  5. Separate IGMP snooping, querier state, PIM neighbor and RPF checks to find multicast loss at its real layer.

Explanation

Correct Answers

B:

The targeted correction for A BGP session is established but a route filter denies every prefix required for the new branch is: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix. It reduces the risk that adding arbitrary static routes can hide an OSPF or BGP configuration defect and later cause asymmetric return traffic.

C:

A separate operational validation for A BGP session is established but a route filter denies every prefix required for the new branch is: The neighbor reaches its designed state, intended routes appear in the correct VRF and bidirectional probes succeed. It proves intended behavior instead of accepting configuration presence alone.

Incorrect Answers

A:

This alternative concerns configuration drift and restore after an outage; its associated risk is: Blind restoration from a stale backup may overwrite healthy newer policies and leave a hidden repeat-failure trigger. The observed case A BGP session is established but a route filter denies every prefix required for the new branch requires the more specific routed-path recovery and ospf/bgp neighbor remediation control. The targeted action is: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.

D:

This alternative concerns qos congestion remediation using actual queue telemetry; its associated risk is: Changing priority globally based on one poor call can starve critical classes or fail to address an undersized physical uplink. The observed case A BGP session is established but a route filter denies every prefix required for the new branch requires the more specific routed-path recovery and ospf/bgp neighbor remediation control. The targeted action is: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.

E:

This alternative concerns multicast join and routed multicast fault recovery; its associated risk is: Enabling more multicast flooding without diagnosis can overload unrelated VLANs and still fail inter-subnet delivery. The observed case A BGP session is established but a route filter denies every prefix required for the new branch requires the more specific routed-path recovery and ospf/bgp neighbor remediation control. The targeted action is: Use route tables, interface IPs, neighbor state and policy output to repair the specific missing or incorrect Layer 3 adjacency or prefix.