Which OpenShift resource is primarily used to expose an application to external traffic with a stable hostname?

• A. ConfigMap
• B. Deployment
• C. Service
• D. Route

Answer: (D)

In OpenShift, exposing an application to external traffic with a stable hostname is handled by a Route. A Route creates an external address (hostname) and forwards traffic to a Kubernetes Service inside the cluster through the OpenShift router. This provides a stable public name, such as app.example.com, that remains consistent across deployments and pod restarts. The router can also terminate TLS if you configure it. A Service itself only gives a stable internal endpoint within the cluster and doesn’t expose a persistent external hostname, while ConfigMap and Deployment are about configuration and pod management, not external traffic exposure.