What is the purpose of using a Kubernetes Namespace?

A Kubernetes Namespace serves primarily to isolate resources within the same cluster. This isolation allows for the organization of resources and helps manage complexity within large environments that may host multiple applications or teams. By creating separate namespaces, teams can define their own resources — such as pods, services, and deployments — without concern for naming conflicts or resource usage overlaps with other teams working in the same cluster.

Namespaces support segregation of resources, enabling different applications or environments (like production, development, and testing) to coexist without interfering with each other. This can lead to improved management, governance, and security practices.

The other choices do not align with the primary function of a namespace. While network policies can restrict traffic between services, those policies are established independently of namespaces and through different configurations. The speed of deployment is related more to CI/CD practices and Kubernetes configuration rather than namespace functionality. Lastly, persistent storage management is handled through persistent volumes and claims, which are also independent of namespaces, even though they can exist in them.