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Text File  |  1994-12-27  |  2KB  |  43 lines
  1. Ref: 20570002
  2. Title: Ethernet Packet Description
  3. Date: 7/27/90
  4.  
  5. Copyright 3Com Corporation, 1991.  All rights reserved.
  6.  
  7. <-------1 Byte------->
  8. 0                    7               DESCRIPTION
  9.  ____________________   ======================================
  10. |__                __|  Address of the next station that will
  11. |__   Immediate    __|  receive the packet.  The address of the
  12. |__  Destination   __|  final destination station is specified in
  13. |__                __|  the "destination host" field of the IDP
  14. |__                __|  packet.
  15. |____________________|  ======================================
  16. |__                __|
  17. |__   Immediate    __|  Address of the last station that the
  18. |__    Source      __|  packet came from.
  19. |__                __|
  20. |__                __|
  21. |__                __|
  22. |____________________|  ======================================
  23. |__     Packet     __|
  24. |__      Type      __|
  25. |____________________|
  26. |                    |
  27. |                    |
  28. |       "DATA"       |
  29. |    or IDP Packet   |
  30. |        when        |
  31. |  Packet Type=0600  |
  32. |                    |
  33. |                    |
  34. |                    |
  35. |                    |
  36. |____________________|  ======================================
  37. |__                __| Cyclic Redundancy Check Number.  This is
  38. |__      CRC       __| used to check for transmission errors.
  39. |__                __| (Note that these bytes are generated and
  40. |____________________| stripped off by the hardware and are not
  41.                        available to any higher layers of software.)
  42.