The Service Execution Manager monitors and controls running services. It can also receive requests from Services regarding status of the network or other information (e.g. time and date). The Switching Domain represents the switched network, that is, the physical telecommunications network. The knowledge of what kind of network this actually is should be of less relevance to the Service, which controls the Switching Domain via the intermediary roles called Communications (C), Monitoring (M), Resource Management (RM), Traffic Management (TM) and Data Management (DM).