1. A data networking protocol comprising: one or more control commands including one or more control commands selectively employed to establish, manage and tear-down a communication session by and between elements of a data network; and one or more attribute-value pair(s) (AVP), selectively employed by a network element to define one or more parameters of an accompanying control command, the AVPs including one or more mobility management AVPs to facilitate exchange of mobility information between at least a subset of the network elements of the data network participating in a point-to-point component of the communication session.