1. A method comprising: maintaining plural logical connections on a communications path; transmitting data packets on different ones of the logical connections; monitoring acknowledgements received in respect of the data packets transmitted over the different ones of the logical connections; reusing a logical connection for which an acknowledgement for a transmitted data packet has been received; creating a new logical connection when there is a data packet to transmit over the path and there are no logical connections available for reuse; and destroying excess logical connections.