Mobile agents are program instances (or processes) capable of moving within the network under their own control. They consist of three parts: code, data state, and execution state. Migration of mobile agents takes place between hosts. These hosts execute the agents and provide functionality to them. This functionality includes communication with other agents and users, migration to other hosts, and other services such as persistency (i.e. storing data or agent snapshots), services lookup (i.e. finding agents that offer a service), location of agents (either locally or on a larger scale), integration of legacy systems such as databases, and the like.
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