Summary

• ELB is an AWS service that automatically distributes incoming network or application traffic to a number of EC2 instances.
• It monitors the health of each of the EC2 instances associated with it and forwards traffic only to healthy instances.
• ELB provides a single point of contact for the EC2 instances behind ELB.
• Each of the EC2 instances is marked with a status: either InService if it is healthy, or OutOfService if it is unhealthy.
• ELB only routes traffic to InService instances.
• ELB helps to provide high availability, scalability, elasticity, fault tolerance, and security to your application workloads running on EC2 instances.
• There are three types of load balancers supported by AWS ELB—Classic Load Balancer, Network Load Balancer, and Application Load Balancer.
• ELB stops sending requests to instances that are either unhealthy or are deregistering from ELB when...