The invention provides methods (300) for organizing and assigning network
address to network nodes in clusters (108, 110, 112, 114, 116, 118, 120,
212, 214, 216, 218, 220), and forming new clusters and also provides a
method 700 for routing messages in clusters. According to the invention,
clusters are organized into hierarchical tree arrangements, with addresses
assigned in a manner that facilitates routing messages.