CKA 2025 | Q - 08 – CNI & Network Policy

Описание: In this CKA 2025 hands-on lab, we solve Question 06 – CNI (Container Network Interface) Installation & NetworkPolicy Support.
You’ll learn how to identify which CNI plugin supports NetworkPolicy enforcement before applying it — a critical step for the real CKA exam.

We compare Flannel vs Calico, explore how to inspect manifests using curl, and confirm which one enables NetworkPolicy without deploying anything.
Then we verify it using simple Kubernetes commands — exactly how you’d do it in an exam environment.

CKA labs - https://killercoda.com/vjain04


🧩 What You’ll Learn

✅ Difference between Flannel and Calico CNIs
✅ How to check a manifest before applying (exam-safe method)
✅ Using curl and grep to inspect YAMLs
✅ Identifying Calico CRDs (networkpolicies.crd.projectcalico.org)
✅ CKA-ready step-by-step reasoning

💡 Commands Used
Inspect manifest content
curl -sL https://raw.githubusercontent.com/pro... | grep -i "projectcalico.org"

Check for CRDs or policy references
curl -sL https://raw.githubusercontent.com/pro... | grep -i "CustomResourceDefinition"

🧠 Key Takeaway
Always choose a CNI that supports NetworkPolicy — in most exam scenarios, Calico is your best choice.


🏷️ Tags
cka, cka exam 2025, kubernetes, kubernetes cni, calico, flannel, networkpolicy, cka labs, kubernetes tutorial, kubernetes devops, kubernetes for beginners, dumbitguy, cka preparation, cka practice, kubernetes networking, cka2025