System Design · Junior · Question 21 of 75
What does a load balancer do?
- ✓Correct answer: Distributes requests among several servers and removes unhealthy ones
- 2Compresses server responses to reduce network load
- 3Limits the number of users who can open the site at once
Explanation
Algorithms: round robin, least connections, IP hash. Health checks exclude failed instances. A load balancer is the foundation of horizontal scaling and fault tolerance.