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N10-009 Domain 5: Network Troubleshooting

Intermittent CRC errors on one switch port. Fix?

Multiple choice — select one answer

Answer choices

  1. a. Replace patch cable and inspect SFP/transceiver
  2. b. Private MAC/Wi-Fi privacy randomization breaking portal auth
  3. c. DNS and firewall rules for walled garden URLs
  4. d. Internal CA not trusted on client or cert name mismatch

Architectural breakdown & explanation

Bad cables or optics cause CRC/FCS errors.

Correct answer(s): a. Replace patch cable and inspect SFP/transceiver

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

Official documentation & study links

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