Which term describes a mechanism that enables services to locate each other and communicate over the network within a cluster?

Which term describes a mechanism that enables services to locate each other and communicate over the network within a cluster?

• A. Namespace isolation
• B. Service Discovery
• C. Volume provisioning
• D. Pod autoscaling

Answer: (B)

Service discovery is the mechanism that lets services find and talk to each other inside a cluster. In Kubernetes, applications come and go, and pod IPs can change, so you need a stable way for one service to reach another. A Kubernetes Service provides a persistent endpoint and a DNS name that represents the set of pods backing that service. When a pod or another service needs to reach it, it resolves the service name to a stable cluster IP (or uses DNS to map to the name) and traffic is directed to one of the healthy pods in the backend. This enables seamless, dynamic communication as pods scale up/down or are replaced. Namespace isolation isn’t about locating services; it’s about restricting access to resources across different namespaces. Volume provisioning is about creating storage resources for pods. Pod autoscaling adjusts the number of pod replicas based on load. Together they don’t address how services discover and communicate with each other within the cluster, which is why service discovery is the correct concept here.

Service discovery is the mechanism that lets services find and talk to each other inside a cluster. In Kubernetes, applications come and go, and pod IPs can change, so you need a stable way for one service to reach another. A Kubernetes Service provides a persistent endpoint and a DNS name that represents the set of pods backing that service. When a pod or another service needs to reach it, it resolves the service name to a stable cluster IP (or uses DNS to map to the name) and traffic is directed to one of the healthy pods in the backend. This enables seamless, dynamic communication as pods scale up/down or are replaced.

Namespace isolation isn’t about locating services; it’s about restricting access to resources across different namespaces. Volume provisioning is about creating storage resources for pods. Pod autoscaling adjusts the number of pod replicas based on load. Together they don’t address how services discover and communicate with each other within the cluster, which is why service discovery is the correct concept here.