In Parallels RAS, the load balancing algorithm is much more sophisticated. Its connection broker can do round-robin load balancing, or resource-based load balancing. Round-robin load balancing is a very basic load balancing mechanism that distributes new sessions to the next session host in the farm, until all session hosts have been visited, at which point it will circle back around to the first session host and repeat the process. This would be similar in effect to a basic RDS deployment which did not use a connection broker, but simply had a load balancer (e.g. like Kemp or F5) that would distribute incoming RDP connections across all session hosts.