- Elastic Load Balancing (ELB) = evenly distributes traffic between EC2 instances that are associated with it.
- ELB = foundational component of high availability and fault tolerance
- Auto Scaling = automatically scaling up or down (more or less instances) based on traffic demand.
- ELB can distribute traffic across multiple AZs and instances to increase fault tolerance.
- ELB can auto detect unhealthy instances and redirect traffic and spin up a new instance to replace the unhealthy one.
- 3 types of ELBs:
- A Network Load Balancer is a type of load balancer for increasing network performance, and managing TLS and TCP traffic.
- The Classic Load Balancer was the previous generation load balancer that managed HTTP, HTTPS, and TCP traffic. It is now used primarily for anyone utilizing the EC2-Classic network.
- An Application Load Balancer is a type of load balancer used for balancing traffic over HTTP and HTTPS.
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