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CKA study material · question 44 of 1000

Which values must be unique across every node in a kubeadm cluster? Choose two.

  1. The MAC address
  2. The container runtime socket path
  3. The product_uuid
  4. The kernel version
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Answer: A. The MAC address
C. The product_uuid

Kubernetes identifies nodes by hostname, MAC address and product_uuid; duplicates can break the install.

Source: Installing kubeadm (Kubernetes) — Before you begin

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