The machines that make up a Kubernetes cluster are called nodes.
Nodes in a Kubernetes cluster may be physical, or virtual.
There are two types of nodes:
A Control-plane-node type, which makes up the Control Plane, acts as the “brains” of the cluster.
A Worker-node type, which makes up the Data Plane, runs the actual container images (via pods).
We’ll dive deeper into how nodes interact with each other later in the presentation.