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CKA study material · question 289 of 1000

Which control plane ports are correct? Choose two.

  1. The API server listens on TCP 6443
  2. kube-scheduler listens on TCP 10250
  3. etcd listens on TCP 2379-2380
  4. kube-controller-manager listens on TCP 6443
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Answer: A. The API server listens on TCP 6443
C. etcd listens on TCP 2379-2380

The API server uses 6443 and etcd 2379-2380; the scheduler is on 10259 and the controller manager on 10257.

Source: Ports and Protocols (Kubernetes) — Control plane

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