KCSA Platform Security Practice Question
Which THREE mechanisms are used in a zero-trust platform security model for cloud-native applications? (Choose three)
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
✓
Implementing microsegmentation via Kubernetes NetworkPolicies and service mesh auth policies
A zero-trust model relies on continuous verification, including mutual TLS encryption, strict admission controls, and principle of least privilege via network and authorization policies.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Granting cluster-admin permissions to all application service accounts
Why it's wrong here
Granting broad admin permissions violates the principle of least privilege central to zero-trust.
- ✓
Implementing microsegmentation via Kubernetes NetworkPolicies and service mesh auth policies
Why this is correct
Microsegmentation restricts lateral movement by explicitly defining allowed network paths.
- ✓
Enforcing mutual TLS (mTLS) for all internal service-to-service communications
Why this is correct
Zero-trust assumes the network is untrusted, requiring encryption and authentication for all internal traffic.
- ✓
Applying strict admission webhook policies to validate workloads before creation
Why this is correct
Validating workloads at admission ensures non-compliant or insecure pods never start.
- ✗
Assuming internal cluster networks are fully secure and trusting all pods by default
Why it's wrong here
Zero-trust explicitly rejects the assumption that internal networks are safe.
About these practice questions
One of 319 original KCSA practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official CNCF / Linux Foundation exam blueprint
This KCSA practice question is part of Courseiva's free CNCF / Linux Foundation 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 KCSA exam.