Since 1990’s, websites began to see increased traffic for which additional servers were required to expand applications. Unplanned Internet outages were common along with existence of natural disasters like power outages, cable damage, router failure and security threats. ISP failures need to be maintained without affecting users or services. When an ISP fails, the Link load balancer (LLB) must ensure that the cloud technologies remain up and running. The critical links compliment networks and ensure that mission critical applications run impeccably. Hosted applications like CRM, order tracking, backup, or other services from cloud providers continue to be available even when ISPs fail to maintain higher productivity across the organization. In this configuration, the Server Load Balancing (SLB) systems act as a reverse proxy, presenting the hosted services to remote network clients.
WAN optimization, also known as WAN acceleration, is the category of technologies and techniques used to maximize the efficiency of data flow across a wide area network (WAN). In an enterprise WAN, the goal of optimization is to increase the speed of access to critical applications and information.