CAS-004 Security Architecture Practice Question
A security team is hardening a Kubernetes cluster. Which control should be implemented to restrict a container's system calls to only those required by the application?
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
✓
Seccomp
seccomp (secure computing mode) filters system calls a process can make, reducing the kernel attack surface. It is a Linux kernel feature commonly used in container security.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Seccomp
Why this is correct
Seccomp restricts system calls for containers.
- ✗
AppArmor
Why it's wrong here
AppArmor is a MAC system that can limit program capabilities but not specifically syscalls.
- ✗
Network policies
Why it's wrong here
Network policies control traffic, not syscalls.
- ✗
Pod security policies
Why it's wrong here
PSPs control pod admission, not syscalls.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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