Answer Description
A Load Balancer is a network device that distributes workloads between different resources like servers, routers and switches. For example, a large website may use a Load Balancer and multiple identical web servers to prevent from overloading a single device.
Wikipedia
In computing, load balancing improves the distribution of workloads across multiple computing resources, such as computers, a computer cluster, network links, central processing units, or disk drives Load balancing aims to optimize resource use, maximize throughput, minimize response time, and avoid overload of any single resource Using multiple components with load balancing instead of a single component may increase reliability and availability through redundancy Load balancing usually involves dedicated software or hardware, such as a multilayer switch or a Domain Name System server process Load balancing differs from channel bonding in that load balancing divides traffic between network interfaces on a network socket (OSI model layer 4) basis, while channel bonding implies a division of traffic between physical interfaces at a lower level, either per packet (OSI model Layer 3) or on a data link (OSI model Layer 2) basis with a protocol like shortest path bridging
Load_balancing_(computing) - Wikipedia, the free encyclopedia