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LinuxFoundation.CKA.v2026-02-23.q38
Question 7

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Question 7/38

You must connect to the correct host.
Failure to do so may result in a zero score.
[candidate@base] $ ssh Cka000054
Context:
Your cluster 's CNI has failed a security audit. It has been removed. You must install a new CNI that can enforce network policies.
Task
Install and set up a Container Network Interface (CNI ) that meets these requirements:
Pick and install one of these CNI options:
Flannel version 0.26.1
Manifest:
https://github.com/flannel-io/flannel/releases/download/v0.26.1/kube-flannel.yml
Calico version 3.28.2
Manifest:
https://raw.githubusercontent.com/project calico/calico/v3.28.2/manifests/tigera-operator.yaml

Correct Answer:

Task Summary
* SSH into cka000054
* Install a CNI plugin that supports NetworkPolicies
* Two CNI options provided:
* Flannel v0.26.1 (# does NOT support NetworkPolicies)
* Calico v3.28.2 # (does support NetworkPolicies)
# Decision Point: Which CNI to choose?
# Choose Calico, because only Calico supports enforcing NetworkPolicies natively. Flannel does not.
# Step-by-Step Solution
1## SSH into the correct node
ssh cka000054
## Required. Skipping this results in zero score.
2## Install Calico CNI (v3.28.2)
Use the official manifest provided:
kubectl apply -f https://raw.githubusercontent.com/projectcalico/calico/v3.28.2/manifests/tigera-operator.yaml This installs the Calico Operator, which then deploys the full Calico CNI stack.
3## Wait for Calico components to come up
Check the pods in tigera-operator and calico-system namespaces:
kubectl get pods -n tigera-operator
kubectl get pods -n calico-system
# You should see pods like:
* calico-kube-controllers
* calico-node
* calico-typha
* tigera-operator
Wait for all to be in Running state.
# (Optional) 4## Confirm CNI is enforcing NetworkPolicies
You can check:
kubectl get crds | grep networkpolicy
You should see:
* networkpolicies.crd.projectcalico.org
* This confirms Calico's CRDs are installed for policy enforcement.
Final Command Summary
ssh cka000054
kubectl apply -f https://raw.githubusercontent.com/projectcalico/calico/v3.28.2/manifests/tigera-operator.yaml kubectl get pods -n tigera-operator kubectl get pods -n calico-system kubectl get crds | grep networkpolicy

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