KCSA Platform Security Practice Question
Which TWO methods can be used to restrict network traffic between services inside a service mesh? (Choose two)
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
✓
PeerAuthentication resources enforcing STRICT mTLS mode between workloads
Service mesh traffic is restricted using AuthorizationPolicies for Layer 7 access control and PeerAuthentication for transport encryption requirements.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Modifying CoreDNS forwarding upstream servers
Why it's wrong here
Upstream DNS forwarding configures external name resolution, not mesh traffic rules.
- ✓
PeerAuthentication resources enforcing STRICT mTLS mode between workloads
Why this is correct
PeerAuthentication ensures that traffic between workloads is encrypted and authenticated via mTLS.
- ✗
Configuring Horizontal Pod Autoscalers
Why it's wrong here
Autoscalers manage replica counts based on workload metrics.
- ✗
Kubernetes PersistentVolumeClaim storage resize operations
Why it's wrong here
Storage resizing manages persistent disk capacity, not network traffic.
- ✓
Istio AuthorizationPolicy resources specifying allowed source principals and methods
Why this is correct
AuthorizationPolicies enforce fine-grained access control based on service accounts and HTTP methods.
About these practice questions
Courseiva writes every KCSA question from scratch — 320 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. 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.