Cost-effective and safe servers for small and medium business: secure and reliable data storage, exchange and publication. All that must be private and confidential will be handled this way, and all that must be public will be easy accessible worldwide. Best fit for goals of small and medium business. Divide all tasks to elementary ones easy to solve and maintain. Iam not a fan of big complex solutions. Every OS has its optimum of usage, variety of the OSs in use is a measure of stability of whole network.