Ethical Hacking Essentials Practice Test

Which Kubernetes object is used to expose a set of pods as a network service?

1. Pod

2. ReplicaSet

3. Service

4. Deployment

The correct answer is: Service

The correct choice is to use a Service within Kubernetes to expose a set of pods as a network service. Services in Kubernetes act as an abstraction layer that provides a stable IP address and DNS name for a set of pods, ensuring that network traffic can be directed to these pods reliably. When multiple pods are running, they may change over time due to scaling or updates. A Service ensures that even if individual pods go down or are replaced, the network endpoint remains consistent, allowing internal and external clients to access the functionality provided by the pods seamlessly. In contrast, a Pod is the basic execution unit in Kubernetes that contains one or more containers but does not manage networking for a group of pods. A ReplicaSet is designed to maintain a stable set of replica pods but lacks the functionality to create a network service. A Deployment provides declarative updates for Pods and ReplicaSets but, like a Pod and ReplicaSet, does not directly expose them as a network service. By using a Service, network traffic can be load-balanced across the specified pods, which optimizes resource use and improves application resilience.