Kubernetes namespace is an abstraction to support multiple virtual clusters on the same physical cluster. You can have multiple namespaces inside a single Kubernetes cluster, and they are all logically isolated from each other. Namespaces provide a logical separation of cluster resources between multiple users, teams, projects, and even customers. Namespaces are a way to divide cluster resources between multiple users (via resource quota). Namespaces have below functionalities and on basis of same we use can use them. However, if we use the only service name and DNS internally identifies it, resolves it within the same Namespace. Namespaces also provide the scope for names, the name of resources within one namespace must be unique.