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Q.05 of 34

What is load balancing and what are the main types?

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Load balancing distributes incoming requests across multiple servers to prevent overload and ensure high availability.

Main Types:

  1. Round Robin: Requests distributed sequentially to each server
  2. Least Connections: Routes to server with fewest active connections
  3. Weighted Round Robin: Assigns weights based on server capacity
  4. IP Hash: Routes based on client IP hash for session persistence
  5. Least Response Time: Routes to server with fastest response

Layers:

  • Layer 4 (Transport): Routes based on IP and port
  • Layer 7 (Application): Routes based on content (HTTP headers, URLs)

Load balancers can be hardware-based, software-based, or cloud-managed services like AWS ALB.

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