System Design Interview Roadmap

System Design Interview Roadmap

L4 vs. L7 Load Balancers: The Trade-offs Nobody Explains Well

Nov 19, 2025
∙ Paid

You’re in an interview. They ask: “Video streaming service vs. API gateway - which load balancer type for each?”

Most candidates say “L7 because it has more features” and lose the round. The actual answer reveals whether you understand systems at a deep level or just memorized definitions.

Github Repo →


https://github.com/sysdr/howtech/tree/main/L4-L7-trade-offs

./demo.sh
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