A real server is an actual physical server that is a member of a server farm. Once a real server becomes a member of a server farm, you must enable it for service. All other real server configurations are optional.
The same physical real servers may belong to multiple server farms. Each server farm is accessed by a unique virtual server.
Each real server can be optionally configured for fail detection, maximum number of active connections, and real server weight used by the weighted round robin load balancing algorithm.