EKS also integrates Kubernetes Service into classic load balancer (also known as ELB). When you create a Kubernetes Service by specifying type:LoadBalancer, EKS creates the Classic ELB instance and security group, and then associates between ELB and worker nodes automatically.

In addition, you can either create an internet-facing (on the public subnet) or internal (on the private subnet) load balancer. If you don't need to serve traffic to the external internet, you should use an internal load balancer for security reasons.