API Gateway vs Kubernetes Service Load Balancing.

API Gateway:

• Layer 7 (Application): Operates on HTTP/REST.
• Role: Routing, Authentication, Rate Limiting, Request Transformation.
• Cross-cutting concerns for ALL services.

Kubernetes Service:

• Layer 4 (Transport): Handles TCP/UDP traffic.
• Role: Discovers service instances (Pods) and distributes traffic among them based on basic IP/Port logic.

Comparison:

API Gateway is for Business Logic/Edge concerns, while Kubernetes Services are for Internal Connectivity and infrastructure-level scaling.