Kinds of Network Entities

• Servers - E.g., web, email, agent names
  One Request / One Response
  Executes on single machine
• Multi-servers - E.g., web-crawlers
• Java Applets
  Code served upon user request
  Just a program of some kind
• Cellular Automata - E.g., Internet routers
  Distributed
  Emergent behavior via protocol
  homogenous

• Mobile Agents
  Program computes IP destination
  Code is pushed rather than served
  State persists
• Typed-Message Agents
  Typed messages (KQML, FIPA ACL) exchanged
  Client-server protocol insufficient
  IP address may or may not move
  State persists

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cjp