A method operates a network, wherein multiple clients are connected to a server for accessing an application that is provided or running on the server. The application is tunneled within one or more corresponding flows between the clients and the server. A device for per flow scheduling of the flows prioritizes the flows based on at least one of application characteristics, application requirements, flow characteristics or flow requirements. The prioritizing by the device takes into consideration a change or a variation, over time, of at least one of an application characteristic, an application requirement, a flow characteristic or a flow requirement.