How Brokers in a Cluster Communicate with Each Other
Each Broker in a cluster is directly connected to each of its peers. For example, in a cluster that consists of Brokers A, B, C and D, Broker A has a connection to Brokers B, C, and D; Broker B has connections to A, C, and D; Broker C has a connection to Brokers A, B, and D, and so forth.