Certified Kubernetes Application Developer (CKAD) Practice Test 2025 - Free CKAD Practice Questions and Comprehensive Study Guide

A Service in a Kubernetes cluster acts as a stable endpoint for accessing a set of Pods. When applications are deployed in Kubernetes, Pods may be created or destroyed dynamically based on scaling needs, health checks, or other factors. This can make it challenging for clients to interact with the Pods directly because their IP addresses would change as Pods are replaced or scaled.

By defining a Service, Kubernetes provides a consistent way to access the Pods, abstracting away the underlying changes. The Service assigns a persistent IP address or DNS name, which remains constant even as the Pods behind it change. It can also utilize various types, such as ClusterIP, NodePort, or LoadBalancer, to route traffic to the Pods it targets, ensuring that users and other services can reliably connect to the desired applications without needing to keep track of the specific Pods' current states.

This architecture allows for better management and scaling of applications while maintaining a user-friendly interface for accessing those applications through the stable Service endpoint.