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N10-009 Domain 5: Network Troubleshooting

After lightning, switch stack partial failure. Step?

Multiple choice — select one answer

Answer choices

  1. a. ICMP/time-exceeded filtered — not always outage
  2. b. Internal CA not trusted on client or cert name mismatch
  3. c. Mis-scoped DHCP or relay pointing to old server
  4. d. Check PoE budget, damaged ports, and redundant power

Architectural breakdown & explanation

Power surges damage ports/modules; verify hardware health.

Correct answer(s): d. Check PoE budget, damaged ports, and redundant power

Exam domain: Domain 5: Network Troubleshooting (22% weight on the official guide).

Official documentation & study links

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