KCNA Cloud Native Architecture Practice Question
Which component in a service mesh is responsible for collecting telemetry data and enforcing traffic policies?
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
✓
Sidecar proxy (data plane)
The sidecar proxy (often Envoy) intercepts all traffic and collects metrics, traces, and logs, and also enforces traffic management rules.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Control plane
Why it's wrong here
The control plane manages configuration but does not handle data plane tasks.
- ✓
Sidecar proxy (data plane)
Why this is correct
The sidecar proxy is part of the data plane and performs these functions.
- ✗
Certificate authority
Why it's wrong here
CA provides certificates, not telemetry or traffic policies.
- ✗
Service mesh ingress gateway
Why it's wrong here
Ingress gateways handle external traffic, but internal telemetry is collected by sidecars.
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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.