System Design, but Simple

System Design, but Simple

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System Design, but Simple
Load Balancers in 1 diagram and 91 words
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System design, explained ridiculously simply. Finally, make sense of system design and pass your next interview!
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Load Balancers in 1 diagram and 91 words

Explained as simply as possible… but not simpler.

Stephane Moreau's avatar
Stephane Moreau
Mar 31, 2025
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System Design, but Simple
System Design, but Simple
Load Balancers in 1 diagram and 91 words
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A load balancer distributes network traffic across multiple servers so no single one gets overwhelmed.

It sits between clients and servers, rerouting traffic if a server fails to keep things running smoothly.

This helps ensure fast, reliable access to apps and services.

You need to know

  1. Common ways to share traffic: round-robin, least connections, and IP hash.

  2. Load balancers ping servers regularly to make sure they’re up before sending traffic.

  3. They can be hardware devices, software, or cloud-based services.

Popular technologies

  • nginx

  • AWS Elastic Load Balancer

  • Azure Load Balancer


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System design, explained ridiculously simply. Finally, make sense of system design and pass your next interview!

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System Design, but Simple
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Load Balancers in 1 diagram and 91 words
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System Design, but Simple
System Design, but Simple
API Gateway in 1 diagram and 147 words
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System Design, but Simple
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Rate Limiting in 1 diagram and 252 words
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System Design, but Simple
System Design, but Simple
Database Sharding in 1 diagram and 204 words

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