CCSP Cloud Platform and Infrastructure Security Practice Question
A security team is hardening a Kubernetes cluster for production workloads. Which THREE measures should they implement to improve runtime container security?
⚠ Common exam trap
ISC2 often tests the distinction between runtime security measures (like AppArmor, Seccomp, and capability dropping) versus build-time or network-level controls, and candidates may confuse privileged containers with necessary system daemons, forgetting that privileged mode bypasses all runtime security layers.
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
✓
Enable AppArmor or SELinux profiles
AppArmor and SELinux are Linux Security Modules (LSMs) that enforce mandatory access control (MAC) policies on containers. By applying these profiles, you restrict what processes inside a container can do—such as file access, network operations, and capability use—beyond the default discretionary access controls. This significantly reduces the attack surface and limits the impact of a container breakout.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Mount the host filesystem as read-write in containers
Why it's wrong here
Read-write host mounts can lead to container escape.
- ✓
Enable AppArmor or SELinux profiles
Why this is correct
These MAC systems enforce security policies on containers.
- ✓
Drop all unnecessary Linux capabilities
Why this is correct
Removing capabilities reduces potential privilege escalation.
- ✓
Apply Seccomp profiles to restrict system calls
Why this is correct
Seccomp limits the syscalls available to containers, reducing attack surface.
- ✗
Use privileged containers for system daemons
Why it's wrong here
Privileged containers increase risk; they should be avoided.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
Go deeper
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CCSP practice question is part of Courseiva's free ISC2 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CCSP exam.