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Data Link Layer

  • use
    • used for error free transfer of data frames
    • source and destination mac address is added
    • FF:FF:FF:FF:FF:FF broadcast mac address, or add mac address of the gateway
    • they keep on changing when frame is passed between routers
    • ip address in never changed
  • protocols
    • Ethernet Ring
    • Token Ring
    • Frame Relay
    • ATM
    • SONET
    • SDH
    • PD H
    • CD MA
    • GSM
  • pdu
    • frames