This graphic shows one cluster with three managed servers. Each server contains one member of a DT (distributed topic). Three messages are received by the DT (indicated by an arrow pointing from 3 messages to the entire DT). Each DT member contains (receives) one message. Each message points to a single MDB instance in the same managed server, to show that each instance receives a single message. For example, DT Member 1 has message 1, which points to the single MDB instance on Managed Server 1, etc.