Communication Model

• ISO/OSI Model

  • Physical
  • Datalink
  • Network
  • Transport
  • Session
  • Presentation
  • Application

• An alternative, e.g. Functional, Model

  • Physical
    • same as ISO/OSI
  • Datagram
    • connectionless service between source and destination process
    • location of services
  • Transport
    • reliable transport between client and server
    • “transaction level”
  • Binding
    • location of resources within the server
    • logical connection between client and server
  • User
    • request semantics

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