☁️ Free practice test question from: KCNA (KCNA)

A standard Kubernetes Service provides:

• A stable virtual IP (cluster IP)

• Load balancing across all member Pods

• A single DNS entry that resolves to this virtual IP

A headless Service (created by setting spec.clusterIP: None) eliminates the virtual IP and changes how DNS resolution works.

For example, if you have a StatefulSet named "database" with 3 replicas and a headless Service "database-svc", you can reliably address each instance:

• database-0.database-svc.default.svc.cluster.local

• database-1.database-svc.default.svc.cluster.local

• database-2.database-svc.default.svc.cluster.local

This pattern is essential for applications where Pod identity matters, such as distributed databases, where each node needs a specific role or needs to be addressed individually.