KCNA Cloud Native Architecture Practice Question
Which component in a service mesh is responsible for handling traffic management, security, and observability as a sidecar proxy?
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
✓
Envoy
Envoy is the most common sidecar proxy used in service meshes like Istio.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Pilot
Why it's wrong here
Pilot is Istio's control plane component.
- ✗
Mixer
Why it's wrong here
Mixer was an older Istio component for policy and telemetry (deprecated).
- ✗
Citadel
Why it's wrong here
Citadel handles certificate management in Istio.
- ✓
Envoy
Why this is correct
Envoy acts as the data plane proxy.
Go deeper
Related to this question
About these practice questions
Courseiva writes every KCNA question from scratch — 833 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 by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This KCNA practice question is part of Courseiva's free CNCF 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 KCNA exam.