CAS-004 Security Architecture Practice Question
An organization wants to enforce that only signed container images are deployed in production. Which of the following should be implemented?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Image signing and verification in the registry
Image scanning verifies signatures and checks for vulnerabilities; however, to enforce only signed images, the registry must require signature verification.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Network policies
Why it's wrong here
Network policies control traffic, not image provenance.
- ✗
Container runtime security (e.g., seccomp)
Why it's wrong here
Seccomp restricts system calls, not image signing.
- ✓
Image signing and verification in the registry
Why this is correct
Image signing ensures integrity and authenticity; verifying signatures before deployment enforces only signed images.
- ✗
Admission controllers
Why it's wrong here
While admission controllers can enforce policies, the specific control for signed images is image signing and verification.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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