System Design · Oracle · Medium
A software load balancer sits in front of a pool of backend servers and distributes incoming traffic across them, improving availability, scalability, and reliability. Layer 4 vs. Layer 7 L4 load balancer: Operates at the transport layer (TCP/UDP). It forwards connections based on IP addresses and ports, without inspecting the application payload. It is fast, lower latency, and protocol-agnostic, but cannot make routing decisions based on URLs, headers, or cookies. L7 load…
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