The AWS Elastic Load Balancing (ELB) automatically distributes your incoming application traffic across multiple targets, such as EC2 instances, containers, and IP addresses, in one or more Availability Zones, ultimately increasing the availability and fault tolerance of your applications. In other words, ELB, as its name implies, is responsible for distributing frontend traffic to backend servers in a balanced manner. ELB monitors the health of its registered targets and routes traffic only to the healthy targets. For example, if a system has only one web server, for system applications with high traffic, long response times or no response will often occur. At this time, you will want to increase the specifications of the web server or increase the number of web servers. If there are two web servers, on which server should the traffic come in? At this time, there must be something responsible for receiving and distributing traffic. That something is ELB.
Romaric Philogène
CEO & Co-founder