Pod Connectivity, Services, and CoreDNS

Introduction

This lesson opens the Services & Networking domain (20% of the CKA, Kubernetes v1.35). The official curriculum lists: understand connectivity between Pods, use ClusterIP, NodePort, LoadBalancer service types and endpoints, and know how to use CoreDNS. The next lesson covers NetworkPolicies, Ingress and the Gateway API. In the exam, tasks are typically "expose this Deployment on port 80 as a NodePort 30080", "why can't this Pod reach that Service?", "change the CoreDNS configuration to forward a domain", or "find the Pod IP range of the cluster".