What is the need for load balancing in distributed computing?

WAN link Load balancing is a session-based process of directing internet traffic among multiple, and varied network connections to help ensure optimal WAN performance. It requires a single WAN link controller located at the main site located between gateway modems/routers and the internal network, and intelligently load balances and provides failover for both inbound and outbound traffic among the network connections. Assuming there are two ISP connections, both network connections can be used at the same time. The benefit here is that you don't pay for bandwidth that is only used as a backup for when an outage occurs. For example, traffic will go through network connection one. If the WAN link controller detects that connection one is over taxed or failed it will direct users across the second ISP connection. Intelligent WAN link controllers will continuously spread the traffic across the network connections based on the available resources. For example, with two T1s, it will not wait until the first T1 is over utilized before sending traffic out the second WAN, it will make use of both lines evenly.