KCNA Cloud Native Architecture Practice Question
In a multi-cloud architecture, what is a common use case for a service mesh?
⚠ Common exam trap
CNCF often tests the misconception that a service mesh is a general-purpose tool for all cross-cloud operations, when in reality it is specifically designed for service-to-service communication (east-west traffic) and does not handle resource synchronization, storage, or ingress gateway functions.
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
✓
To enable secure service-to-service communication across clusters
A service mesh, such as Istio or Linkerd, provides a dedicated infrastructure layer for handling service-to-service communication. In a multi-cloud architecture, its common use case is to enable secure, observable, and resilient communication between services running in different Kubernetes clusters across clouds, using mutual TLS (mTLS) for encryption and traffic policies for routing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
To enable secure service-to-service communication across clusters
Why this is correct
Service mesh provides mTLS and traffic management across clusters.
- ✗
To synchronize Kubernetes resources across clouds
Why it's wrong here
This is not a service mesh function.
- ✗
To provide cloud-agnostic block storage
Why it's wrong here
Storage is outside service mesh scope.
- ✗
To provide a single ingress gateway for all clouds
Why it's wrong here
Service mesh can do this, but it's not its primary multi-cloud use case.
Go deeper
Related to this question
Learn chapter
Cloud Native Architecture and Concepts
Key term
ReplicaSet and Replication
A ReplicaSet ensures a specified number of identical pod instances are running at all times in Kubernetes, using replication to maintain availability and stability.
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
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.