A method and apparatus for the delivery of digital data to an end user (902) from a network (900) comprising at least two different data sources (912a, 912b) is disclosed. Each of the at least two different data sources (912a, 912b) can deliver the digital data to the end network at at least one parameter and the data sources (912a, 912b) have substantially identical copies of the digital data comprising portions and are connected to the end user (902). The method comprises receiving (1011) a list of a subset of the at least two data sources (912a, 912b) and selecting (1012) on the basis of the list one or more of the subset of at least two data sources (912a, 912b). At least a portion of the digital data from the selected ones of the at least two data sources (912a, 912b) is delivered to the end user (902). The parameter for the delivery of the digital data to the end user (902) is monitored and the configuration (913) of the selected ones of the at least two data sources (912a, 912b) is adjusted (1015) on the basis of the monitored parameter such that a combined configuration of the configurations (913) of the selected ones of the at least two data sources (912a, 912b) matches the specification (905).