This graphic show four servers, labeled A (top left), B (top right), C (bottom right), and D (bottom left). Each server contains a box labeled "Object X" and "A, C." In the middle of the graphic, surrounded by the servers, is "IP Unicast." An arrow points from server A to IP Unicast. An arrow points from IP Unicast to server B. An arrow points from IP Unicast to server C. An arrow points from IP Unicast to server D.