Which mechanism does Kubernetes use to distribute high network traffic across containers to balance the load?

Which mechanism does Kubernetes use to distribute high network traffic across containers to balance the load?

• A. DNS
• B. Auto-scaling
• C. Load balancing
• D. Health checks

Answer: (C)

Load balancing is the mechanism Kubernetes uses to distribute high network traffic across multiple containers. A Service groups a set of pods and provides a stable endpoint for clients. The kube-proxy component on each node forwards incoming requests to one of the healthy pods behind that Service, typically in a round-robin or IP-based manner. This ensures traffic is spread across multiple pods, so no single container becomes a bottleneck. For traffic from outside the cluster, an external load balancer or an Ingress controller can route requests into the cluster and apply the same distribution logic. DNS isn’t an active balancing mechanism by itself; it resolves names but doesn’t adapt to pod health or changing traffic. Auto-scaling increases or decreases the number of pods but doesn’t handle how requests are distributed. Health checks verify that pods can handle traffic and help the load balancer avoid unhealthy instances, but they don’t perform the actual distribution of requests.

Load balancing is the mechanism Kubernetes uses to distribute high network traffic across multiple containers. A Service groups a set of pods and provides a stable endpoint for clients. The kube-proxy component on each node forwards incoming requests to one of the healthy pods behind that Service, typically in a round-robin or IP-based manner. This ensures traffic is spread across multiple pods, so no single container becomes a bottleneck. For traffic from outside the cluster, an external load balancer or an Ingress controller can route requests into the cluster and apply the same distribution logic.

DNS isn’t an active balancing mechanism by itself; it resolves names but doesn’t adapt to pod health or changing traffic. Auto-scaling increases or decreases the number of pods but doesn’t handle how requests are distributed. Health checks verify that pods can handle traffic and help the load balancer avoid unhealthy instances, but they don’t perform the actual distribution of requests.