Sliding Window Protocols

• SENDER (continued):

  • Let SWS be the maximum sender window size.
  • Let LAR be the sequence number of the last acknowledgment received.
  • Let LFS be the sequence number of the last frame sent.
  • Therefore LFS - LAR + 1 <= SWS.
  • The sender must have a buffer large enough to hold as many frames as there are in its window.
  • sender records the time at which every packet is sent

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