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Question 690
REST calls hang while data forwarding and processor utilization remain normal; one administrative service is stuck. What could be failing?
- Firmware defect in affected release
- High memory utilization or exhaustion
- A long-running stuck management process
- Uncontrolled ARP or broadcast punt rate
Explanation
Correct Answer
C:The management daemon may be unresponsive independent of packet forwarding. A hung service may affect API or monitoring response despite normal interface forwarding.
Incorrect Answers
A:A reproducible issue introduced after a switch OS upgrade may require vendor investigation or corrected release. But this does not address the case requirement to identify management-service hang.
B:Resource pressure may disrupt control-plane services and management agents even with healthy link counters. But this does not address the case requirement to identify management-service hang.
D:Exception packets that repeatedly reach CPU can starve routing and management processes. But this does not address the case requirement to identify management-service hang.
Question 691
A switch fleet fails a feature only after moving to firmware X, and rollback restores behavior. Which diagnosis is credible?
- Firmware defect in affected release
- Misconfigured NAE agent action frequency
- A long-running stuck management process
- Excessive syslog or telemetry export volume
Explanation
Correct Answer
A:Version-dependent software regression warrants a supported fix or advisory. A reproducible issue introduced after a switch OS upgrade may require vendor investigation or corrected release.
Incorrect Answers
B:A monitoring agent with overaggressive polling or action callbacks can contribute to load or unnecessary events. But this does not address the case requirement to identify release-specific code fault.
C:A hung service may affect API or monitoring response despite normal interface forwarding. But this does not address the case requirement to identify release-specific code fault.
D:An overly verbose instrumentation configuration can burden processing and transport resources. But this does not address the case requirement to identify release-specific code fault.
Question 692
Network throughput is fine but high-volume telemetry collection stalls interactive CLI every minute. What should be reduced or tuned?
- Firmware defect in affected release
- High memory utilization or exhaustion
- Misconfigured NAE agent action frequency
- Excessive syslog or telemetry export volume
Explanation
Correct Answer
D:Excessive collection and export frequency burdens the management path. An overly verbose instrumentation configuration can burden processing and transport resources.
Incorrect Answers
A:A reproducible issue introduced after a switch OS upgrade may require vendor investigation or corrected release. But this does not address the case requirement to identify logging/telemetry overhead.
B:Resource pressure may disrupt control-plane services and management agents even with healthy link counters. But this does not address the case requirement to identify logging/telemetry overhead.
C:A monitoring agent with overaggressive polling or action callbacks can contribute to load or unnecessary events. But this does not address the case requirement to identify logging/telemetry overhead.
Question 693
A routing protocol loses keepalives whenever packets are punted at unusually high rates. Which root cause should be investigated?
- A long-running stuck management process
- Excessive syslog or telemetry export volume
- Uncontrolled ARP or broadcast punt rate
- Firmware defect in affected release
Explanation
Correct Answer
C:Exception traffic may be starving the control-plane CPU. Exception packets that repeatedly reach CPU can starve routing and management processes.
Incorrect Answers
A:A hung service may affect API or monitoring response despite normal interface forwarding. But this does not address the case requirement to identify punt-related control overload.
B:An overly verbose instrumentation configuration can burden processing and transport resources. But this does not address the case requirement to identify punt-related control overload.
D:A reproducible issue introduced after a switch OS upgrade may require vendor investigation or corrected release. But this does not address the case requirement to identify punt-related control overload.
Question 694
A new broad deny rule precedes the approved HTTPS permit on an SVI; the web application intermittently fails after policy edits. What should be checked first?
- Incorrect ACL order or scope
- Control-plane policing drop
- MAC authentication fallback churn
- RADIUS server response delay
Explanation
Correct Answer
A:ACL rule order and direction may block expected flows. An early broad rule can shadow a more specific permit and make application flows appear slow or broken.
Incorrect Answers
B:A restrictive control-plane policy may discard required protocol packets and indirectly disrupt data services. But this does not address the case requirement to identify policy rule shadowing.
C:Frequent failure or retry between authentication methods can repeatedly replace an endpoint's access role. But this does not address the case requirement to identify policy rule shadowing.
D:Slow or unreachable AAA service can hold endpoint authorization pending and delay connectivity. But this does not address the case requirement to identify policy rule shadowing.
Question 695
A secure wired endpoint repeatedly transitions authorized to unauthorized despite stable physical link status. Which control is most likely flapping?
- 802.1X reauthentication instability
- Security role with unintended rate or VLAN treatment
- MAC authentication fallback churn
- RADIUS server response delay
Explanation
Correct Answer
A:802.1X authorization state is changing and interrupting user frames. Repeated authorization state changes can interrupt traffic while physical carrier remains healthy.
Incorrect Answers
B:A returned role can place devices in a slow or restricted path unrelated to the intended application. But this does not address the case requirement to identify repeated reauthentication instability.
C:Frequent failure or retry between authentication methods can repeatedly replace an endpoint's access role. But this does not address the case requirement to identify repeated reauthentication instability.
D:Slow or unreachable AAA service can hold endpoint authorization pending and delay connectivity. But this does not address the case requirement to identify repeated reauthentication instability.
Question 696
A laptop waits 40 seconds for access and switch logs show RADIUS timeouts. What service causes the delay?
- MAC authentication fallback churn
- RADIUS server response delay
- Security role with unintended rate or VLAN treatment
- Incorrect ACL order or scope
Explanation
Correct Answer
B:Unresponsive AAA replies delay final role authorization. Slow or unreachable AAA service can hold endpoint authorization pending and delay connectivity.
Incorrect Answers
A:Frequent failure or retry between authentication methods can repeatedly replace an endpoint's access role. But this does not address the case requirement to identify RADIUS response latency.
C:A returned role can place devices in a slow or restricted path unrelated to the intended application. But this does not address the case requirement to identify RADIUS response latency.
D:An early broad rule can shadow a more specific permit and make application flows appear slow or broken. But this does not address the case requirement to identify RADIUS response latency.
Question 697
A printer toggles between MAB fallback and a failed 802.1X attempt, losing its VLAN each time. What is likely causing intermittent performance?
- 802.1X reauthentication instability
- Security role with unintended rate or VLAN treatment
- Control-plane policing drop
- MAC authentication fallback churn
Explanation
Correct Answer
D:Authentication-method fallback repeatedly changes endpoint roles. Frequent failure or retry between authentication methods can repeatedly replace an endpoint's access role.
Incorrect Answers
A:Repeated authorization state changes can interrupt traffic while physical carrier remains healthy. But this does not address the case requirement to identify MAB fallback oscillation.
B:A returned role can place devices in a slow or restricted path unrelated to the intended application. But this does not address the case requirement to identify MAB fallback oscillation.
C:A restrictive control-plane policy may discard required protocol packets and indirectly disrupt data services. But this does not address the case requirement to identify MAB fallback oscillation.
Question 698
OSPF packets are dropped by a newly tightened control-plane policy; data ports report no congestion. What policy is implicated?
- 802.1X reauthentication instability
- Control-plane policing drop
- RADIUS server response delay
- Security role with unintended rate or VLAN treatment
Explanation
Correct Answer
B:Control-plane policing can suppress protocol control traffic. A restrictive control-plane policy may discard required protocol packets and indirectly disrupt data services.
Incorrect Answers
A:Repeated authorization state changes can interrupt traffic while physical carrier remains healthy. But this does not address the case requirement to identify strict CoPP for required protocol packets.
C:Slow or unreachable AAA service can hold endpoint authorization pending and delay connectivity. But this does not address the case requirement to identify strict CoPP for required protocol packets.
D:A returned role can place devices in a slow or restricted path unrelated to the intended application. But this does not address the case requirement to identify strict CoPP for required protocol packets.
Question 699
Two identical devices are granted different dynamic roles, one receiving a restricted bandwidth profile. Why is only one slow?
- Control-plane policing drop
- Security role with unintended rate or VLAN treatment
- Incorrect ACL order or scope
- 802.1X reauthentication instability
Explanation
Correct Answer
B:AAA enforcement role changes the VLAN or authorized service characteristics. A returned role can place devices in a slow or restricted path unrelated to the intended application.
Incorrect Answers
A:A restrictive control-plane policy may discard required protocol packets and indirectly disrupt data services. But this does not address the case requirement to identify role-based bandwidth restriction.
C:An early broad rule can shadow a more specific permit and make application flows appear slow or broken. But this does not address the case requirement to identify role-based bandwidth restriction.
D:Repeated authorization state changes can interrupt traffic while physical carrier remains healthy. But this does not address the case requirement to identify role-based bandwidth restriction.
Question 700
Troubleshooting points to a new ACL change where a general deny matches traffic before a permitted-specific destination. What is the likely fault?
- MAC authentication fallback churn
- RADIUS server response delay
- 802.1X reauthentication instability
- Incorrect ACL order or scope
Explanation
Correct Answer
D:ACL precedence is causing unintended denial. An early broad rule can shadow a more specific permit and make application flows appear slow or broken.
Incorrect Answers
A:Frequent failure or retry between authentication methods can repeatedly replace an endpoint's access role. But this does not address the case requirement to identify shadowed authorized traffic.
B:Slow or unreachable AAA service can hold endpoint authorization pending and delay connectivity. But this does not address the case requirement to identify shadowed authorized traffic.
C:Repeated authorization state changes can interrupt traffic while physical carrier remains healthy. But this does not address the case requirement to identify shadowed authorized traffic.
HPE Network Switching Professional (HPE7-A08) Practice Tests