Load balancer
A load balancer (hereinafter, the Balancer) is any system that performs load balancing. The Balancer accepts client's requests, selects a resource to fulfill that request, forwards the request to the selected resource, receives its response, and returns that response back to the client.
The Balancers work with multiple nodes; this feature distinguishes them from reverse proxies that accepts client's request, forwards this request to the resource, received its response, and it to a server that can fulfill it, and returns that response to the client.
