Which resource is used to expose a stable network endpoint for a dynamic set of Pods?

Which resource is used to expose a stable network endpoint for a dynamic set of Pods?

• A. Pod
• B. Node
• C. Service
• D. ConfigMap

Answer: (C)

The resource that provides a stable network endpoint for a dynamic set of Pods is a Kubernetes Service. A Service offers a fixed virtual IP address (and DNS name) that clients can use to reach the application, while the actual Pods behind it can scale up or down or be replaced. It uses label selectors to identify the pods that should receive traffic and maintains endpoints that reflect the current healthy pods, so the client endpoint remains constant even as the underlying pods change. This decouples how clients reach the app from the evolving Pod IPs and lifecycles. Pods have ephemeral IPs and lifecycles, so directing traffic to a Pod directly would require updating the endpoint every time a Pod is created, destroyed, or moved. A Node is just an individual host and doesn’t provide a stable application-level endpoint across a set of Pods. ConfigMap is for configuration data, not for routing or exposing network endpoints.

The resource that provides a stable network endpoint for a dynamic set of Pods is a Kubernetes Service. A Service offers a fixed virtual IP address (and DNS name) that clients can use to reach the application, while the actual Pods behind it can scale up or down or be replaced. It uses label selectors to identify the pods that should receive traffic and maintains endpoints that reflect the current healthy pods, so the client endpoint remains constant even as the underlying pods change. This decouples how clients reach the app from the evolving Pod IPs and lifecycles.

Pods have ephemeral IPs and lifecycles, so directing traffic to a Pod directly would require updating the endpoint every time a Pod is created, destroyed, or moved. A Node is just an individual host and doesn’t provide a stable application-level endpoint across a set of Pods. ConfigMap is for configuration data, not for routing or exposing network endpoints.