ELBs are seen as a fundamental component of AWS architecture when implementing solutions to automatically scale and manage requests put upon your applications and services.
ELBs are essentially used to control, manage, and distribute incoming requests to a specified resource group, therefore load balancing these requests across a fleet of designated EC2 instances, containers, Lambda functions, or IP addresses. How you architect the placement of your targets within your resource groups is down to you, but utilizing multiple Availability Zones (AZs) will certainly help to increase the level of resiliency of your solutions should a failure occur within a specific AZ. Best practice dictates that you should architect your solutions making full use of the AWS global infrastructure.
Before we delve deeper into the topic of ELBs, let's first understand the types.
