Cert Master

KT-EMS Spoofing

A VoIP caller ID shows your company's main number. What technical control reduces this spoofing vector?

Multiple choice — select one answer

Answer choices

  1. a. Remove VLANs from the PBX, without security or identity team coordination per policy.
  2. b. Publish the main number on Instagram only
  3. c. Disable MFA for call center staff, without security or identity team coordination per policy.
  4. d. STIR/SHAKEN attestation on carrier trunks where supported

Architectural breakdown & explanation

STIR/SHAKEN improves caller ID integrity for voice spoofing on supported carriers.

Correct answer(s): d. STIR/SHAKEN attestation on carrier trunks where supported

Exam domain: Spoofing (25% weight on the official guide).

Official documentation & study links

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