The image shows three rectangles that represent three clusters. A single rectangles is labeled as a sender cluster, a single rectangle is labeled as a sender and repeater cluster, and the final rectangle is labeled as a receiver cluster. The clusters are organized into two groups with the sender and receiver rectangle being shared by each group. An arrow between the rectangles indicates that data can be replicated between the sender clusters in one group and the data can also be sent from the repeater cluster to the receiver cluster in the other group.