Load Balancer What is a Load Balancer? A load balancer is a device or software that distributes incoming network traffic across multiple servers to optimise performance and prevent overload. Explanation Load balancers ensure reliability and scalability by redirecting traffic to healthy servers during high demand. They are vital for maintaining uptime and enhancing user experiences. Practical Example of a Load Balancer An e-commerce website uses a load balancer to manage traffic during a flash sale, ensuring customers experience smooth navigation and transactions.