LLC Services

LLC Services

• LLC provides four types of services to the Network layer
  • Type 1: Connectionless Service (Unreliable)
    • Datagram based
  • Type 2: Connection-Oriented Service (Reliable)
    • Frame loss problem
    • Frame duplication problem
    • Frames out of order problem
  • Type 3: Connectionless Service with Acknowledgement (Reliable)
    • Datagram based
  • Type 4: All the above services
• Three kinds of Primitives
  • Request
  • Indication
  • Confirm

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