Within Kubernetes, a Service provides what essential function?

• A. An Ingress resource for HTTP routing
• B. A network abstraction that exposes a set of Pods as a single endpoint
• C. A policy to restrict network traffic
• D. A persistent storage binding

Answer: (B)

A Service provides a stable network endpoint that represents a group of pods. Pods in Kubernetes are ephemeral and their IPs can change as they come and go. A Service selects a set of pods (typically by labels) and exposes them through a single, stable address (a cluster IP and DNS name). This allows clients to reach the whole group without needing to know the individual pod IPs, and it enables simple load balancing across healthy pods.

Ingress, by contrast, is about routing external HTTP traffic into the cluster, not the basic pod exposure function of a Service. A NetworkPolicy controls which traffic is allowed between pods and namespaces, not the mechanism for exposing pods. A persistent storage binding relates to storage rather than networking.