Distributed Systems Fundamentals · question
Question 5 of 51
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:
- Round Robin: Requests distributed sequentially to each server
- Least Connections: Routes to server with fewest active connections
- Weighted Round Robin: Assigns weights based on server capacity
- IP Hash: Routes based on client IP hash for session persistence
- 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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