A method and apparatus for managing communications in a distributed computing system wherein a plurality of computers are interconnected with a communications network. At least a portion of the network is established as a subnetwork with at least one node attached to the subnetwork. The node in the subnetwork...http://www.google.se/patents/US6735200?utm_source=gb-gplus-sharePatent US6735200 - Method and apparatus for monitoring the availability of nodes in a communications network
