Kubernetes powers cloud-native apps, but default networking exposes risks. Network Policies with Calico or Cilium enforce pod-level segmentation, blocking unauthorized traffic. Integrate service meshes like Linkerd for mTLS and observability. Gatekeeper via OPA validates configs at admission. Runtime tools such as Tetragon trace kernel events. Multi-cluster federation with Karmada extends policies. This thwarts container escapes, aligning with CIS benchmarks. Monitor with Prometheus for anomaly alerts