Explain the concept of network interaction between nodes in a Kubernetes cluster.

In Kubernetes, each node in the cluster has its own IP address, and all pods within the cluster can communicate with each other directly via these IPs without the need for port forwarding or NAT. This is achieved through network plugins (CNI), which provide a unified flat network for all pods.

Key points:

• Each pod receives a unique IP address.
• Nodes are connected through overlay networks or other networking technologies, ensuring traffic routing.
• Kubernetes services create an abstraction over pods, allowing access via stable virtual IPs and DNS names.

Thus, the network interaction within the cluster is designed to ensure transparent and reliable communication between components, regardless of which node they are running on.