An apparatus and method of determining an allocation of data across multiple data communications networks. A first portion of a data set is received through a first data communications network. A second portion, that is different from the first portion, of the data set is received through a second data communications network that uses a different data communications protocol than the first data communications network. A respective characteristic of the first data communications network and the second data communication network are determined at a receiver. In response to determining these respective characteristics and based upon the respective characteristics, an allocation of data between the first data communications network and the second communications network is determined such that the allocation satisfies at least one data transfer performance requirement associated with the data set. An indication of the allocation is sent to a transmitter of the data set.