ITGSS Certified DevOps Engineer Practice Test

What type of network does Kubernetes create for its resources?

1. Public

2. Private

3. Shared

4. Global

The correct answer is: Private

Kubernetes creates a private network for its resources. This is essential for the operation of Kubernetes as it ensures secure communication between various components, such as pods, services, and nodes. Within the Kubernetes architecture, each pod gets its own IP address and can communicate with other pods in the same namespace or across namespaces through this private networking model. This isolation enhances security and makes it possible to manage and scale resources effectively without exposing them to the public internet. In a private network, communication happens internally within the cluster, which prevents external entities from easily accessing services unless explicitly exposed. This model aligns with Kubernetes’ intent to provide a robust environment for running containerized applications while still maintaining the necessary security protocols. Other types of networks, such as public, shared, or global, do not accurately reflect how Kubernetes manages interactions among its resources. Public networks would expose resources to the outside world, and shared networks would imply a lack of isolation among workloads, potentially leading to security vulnerabilities. Global networks, while beneficial for specific scenarios, are not a standard feature of Kubernetes networking. Hence, the idea of a private network aligns perfectly with Kubernetes' design goals and operational requirements.