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Application

Application. Transport. Network. you are here. Link. Physical. Network host-to-host. Link node-to-node frame-by-frame. Physical node-to-node bit-by-bit. 101101001000100101010. Framing. Possible Link Layer Services. Shared Point-to-Point. Possible Link Layer Services.

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Application

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Presentation Transcript

  1. Application Transport Network you are here Link Physical

  2. Network host-to-host Link node-to-node frame-by-frame Physical node-to-node bit-by-bit 101101001000100101010

  3. Framing Possible Link Layer Services

  4. SharedPoint-to-Point Possible Link Layer Services

  5. Flow Control Possible Link Layer Services

  6. ReliableUnreliable Possible Link Layer Services

  7. Error Detection & Recovery Possible Link Layer Services

  8. Link Layer Adapter

  9. Ethernet

  10. source and destination address

  11. MAC Address 90:AF:F4:CA:BA:03

  12. type

  13. CRC

  14. CRC Cyclic Redundancy Check

  15. d data bits r CRC bits

  16. d data bits r CRC bits r+1 bits G = n x

  17. d data bits r CRC bits r+1 bits G = nx

  18. D2rxor R = nG d data bits r CRC bits r+1 bits G = nx

  19. CRC

  20. data

  21. preamble

  22. SharedPoint-to-Point Different Link Layer Services

  23. Multiple Access Protocols

  24. 1. Channel Partitioning TDM, FDM

  25. 2. Taking Turns

  26. Polling

  27. Token Passing

  28. 3. Random Access

  29. Slotted ALOHA

  30. ALOHA

  31. CSMA

  32. CSMA/CD

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