For any IT-savvy organization, setting up any service without some form of redundancy is not an option, and this is where load balancing comes into play. Setting up load-balanced URA servers provides two benefits:
It allows you to provide service to more users than what a single server can handle
It allows the service to function continuously even if one server goes out of commission for some reason, either planned or unexpected
Load balancing means setting up one public IP and hostname that represents multiple servers, and having some mechanism that forwards incoming requests to these servers and distributes them equally (or as per the ratio of load you want each to handle). This can be done in two ways:
Using the built-in Network Load Balancing (NLB) service in Windows Server
Using a third party device, such as those sold by F5 Networks, Cisco, Radware, Barracuda, and others
There's one more option, referred to as Global Load Balancing (GLB), and it is used when you...