Service Discovery is the process that Jini clients use to find Jini Services. The Jini platform includes multiple mechanisms for Service Discovery. The multicast announcement and multicast discovery mechanisms allow Jini clients and services on relatively close (related to multicast TTL limits on the network) network segments to find each other without prior knowledge. The unicast service locator mechanism allows prior knowledge to be used to directly access a Jini lookup service which can be used to find services of interests.