N10-009 Domain 4: Network Security

Which email security record helps prevent spoofing?

Multiple choice — select one answer

Answer choices

  1. a. Evil twin
  2. b. Micro-segmentation / VLAN ACLs
  3. c. Expired or untrusted CA signature
  4. d. SPF/DKIM/DMARC

Architectural breakdown & explanation

Email auth records reduce forged sender mail.

Correct answer(s): d. SPF/DKIM/DMARC

Exam domain: Domain 4: Network Security (19% weight on the official guide).

Official documentation & study links

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