Concept and Features of a Load Balancer
What Is a Load Balancer?
A load balancer is a system that distributes server load.
Types of Load Balancers
L4: Port-Based
- Distributes load using information from layer 4 and below.
- In particular, it distributes traffic using MAC (layer 2), IP (layer 3), and port (layer 4) information.
L7: URL-Based
- Distributes load using application layer information.
- It can inspect packet contents, distribute traffic, and filter abnormal traffic such as DDoS attacks.