Definition and Overview
A Mobile Agent, namely, is a type of software agent, with the feature of autonomy, social ability, learning,and most importantly, mobility.
More specifically, a mobile agent is a process that can transport its state from one environment to another, with its data intact, and be capable of performing appropriately in the new environment. Mobile agents decide when and where to move. Movement is often evolved from RPC methods. Just as a user directs an Internet browser to "visit" a website (the browser merely downloads a copy of the site or one version of it in the case of dynamic web sites), similarly, a mobile agent accomplishes a move through data duplication. When a mobile agent decides to move, it saves its own state, transports this saved state to the new host, and resumes execution from the saved state.
A mobile agent is a specific form of mobile code, within the field of code mobility. However, in contrast to the Remote evaluation and Code on demand programming paradigms, mobile agents are active in that they can choose to migrate between computers at any time during their execution. This makes them a powerful tool for implementing distributed applications in a computer network.
An open multi-agent systems (MAS) is a system in which agents, that are owned by a variety of stakeholders, continuously enter and leave the system.
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