You create a Pod. It gets an IP address and can communicate with other Pods. But how does that actually happen? Kubernetes doesn’t manage networking itself. It delegates the entire job to CNI Plugins — the invisible plumbing system of Kubernetes. Kubernetes schedules Pods, but CNI plugins give them network identity and connectivity . Let’s break it down clearly. What is CNI? Container Network Interface is a specification , not a single tool. It defines a standard way for Kubernetes (and container runtimes) to configure networking for Pods. When Kubernetes needs to connect a Pod to the network, it calls a CNI plugin and says: “Give this Pod an IP, set up connectivity, and make it work.” Why Kubernetes Uses CNI Networking needs vary across environments: Simple setups for learning High-performance production clusters Strict security and network policies Cloud provider integrations CNI makes Kubernetes networking agnostic — you can choose different plugins without changing Kubernetes.…