Unicast-to-multicast streaming is a solution similar to stream splitting, except that in final delivery segment the stream is converted to multicast to minimize the bandwidth usage impact on the network and to minimize the load on the Content Engine. With unicast-to-multicast streaming, if you have a Content Engine in the same location as your clients, the Content Engine can acquire the stream as a single unicast stream over the WAN and convert it to a multicast in the LAN.