KCNA Cloud Native Architecture Practice Question
In a service mesh architecture, what is the role of the 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
✓
It intercepts and controls network communication to and from the main container
The sidecar proxy intercepts all network traffic to/from the main container, enabling observability, traffic management, and security without modifying application code.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It provides persistent storage for the pod
Why it's wrong here
Storage is provided by volumes, not the sidecar proxy.
- ✗
It manages the lifecycle of the pod
Why it's wrong here
Pod lifecycle is managed by Kubernetes controllers, not the sidecar.
- ✓
It intercepts and controls network communication to and from the main container
Why this is correct
The sidecar proxy handles traffic routing, telemetry, and security policies.
- ✗
It serves as the main application container
Why it's wrong here
The sidecar is a separate container that runs alongside the main container.
Go deeper
Related to this question
Learn chapter
Cloud Native Architecture and Concepts
Key term
Service Mesh
A service mesh is a dedicated infrastructure layer that manages communication between microservices, handling tasks like service discovery, load balancing, encryption, and observability without requiring changes to application code.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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