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Elastic Load Balancing ELB

April 5, 2026

Elastic Load Balancing

Distribute traffic across EC2, containers, Lambda targets.

ELB Types Comparison

ALB (Application):
- HTTP/HTTPS/gRPC/WebSocket
- Path/content routing
- Host/IP targets
- $0.0225/hr + LCU

NLB (Network):
- TCP/UDP/TLS
- Ultra-low latency (<100us)
- Static IP per AZ
- $0.0225/hr

Gateway Load Balancer (GWLB):
- Third-party firewalls/IDS
- Transparent network appliances

Target Groups & Health Checks

Lambda/EC2/IP targets
HTTP 200-399 = healthy
Cross-zone load balancing
Stickiness (session affinity)

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