DataStructures / System Design
Difference: API Gateway, Load Balancer, and Reverse Proxy.
| Core Purpose | API Gateway | Load Balancer | Reverse Proxy |
|---|---|---|---|
| Main Job | Manage multiple API services | Distribute traffic | Optimize web apps |
| Scope | Different services | Same service | Single web application |
| Auth | Advanced | Basic | Basic |
| Smart Routing | Yes | ALB - Yes NLB - No |
Limited |
| Caching | API Responses | Basic Sticky Session | Advanced |
| OSI Layer | Layer 7 HTTP(s), JSON, REST |
Layer 7 - ALB Layer 4 - NLB TCP/UDP |
Layer 7 |
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