Software Load Balancers

### The Software Revolution

Software Load Balancers run on standard commodity hardware or virtual machines. Popular open-source options include NGINX and HAProxy.

### Cloud Load Balancers

Cloud providers abstract this entirely with managed services (e.g., AWS Application Load Balancer, GCP Cloud Load Balancing).

### Advantages

- **Cost-Effective:** Pay for what you use, avoiding massive hardware investments. - **Elasticity:** Software load balancers can themselves be scaled horizontally to handle massive traffic spikes. - **Programmability:** Easily integrated into Infrastructure as Code (IaC) and CI/CD pipelines for dynamic configuration.