300-910 Question #44: Real Exam Question with Answer & Explanation

Question

Refer to the exhibit. What are the properties of the load balancer in a Kubernetes environment?

Options

• AHas exposed ports 80 and 8080 to a private IP address and directs outgoing connections to the port named http-port1
• BHas exposed ports 80 and 8080 to a public IP address and directs incoming connections to the port named nginx-port
• CForwards incoming traffic from the port named nginx-port to ports 80 and 8080 of nginxapp
• DForwards any outgoing traffic from the port named nginx-port to exposed ports http-port1 and http-port2 of nginxapp

Explanation

The question asks about the properties of a Kubernetes LoadBalancer, implying common configuration and behavior, even without an exhibit.

Common mistakes.

• A. LoadBalancer services are primarily for exposing services to the public internet, not typically just a private IP, unless explicitly configured for internal load balancing. It also handles incoming, not outgoing, connections.
• C. Load balancers forward incoming traffic from an exposed service port (e.g., 80 or 8080) to the target port (like nginx-port) of the backend pods, not the other way around.
• D. Load balancers handle incoming traffic to the service, not outgoing traffic. The concept of forwarding outgoing traffic from a specific port name to exposed ports is incorrect for a LoadBalancer Service.

Concept tested. Kubernetes LoadBalancer Service properties

Reference. https://kubernetes.io/docs/concepts/services-networking/service/#loadbalancer

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