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Transmission Control Protocol ​

Feature ​

  • connection-oriented

Structure ​

TCP segment

20 bytes

Pipeline (sliding window) ​

Go-Back-N (GBN) ​

the receiver doesn't need a buffer

Scenario

  • out of order / packets gap
    • discard all the following packets

Selective Repeat ​

the receiver need a buffer to store packets,

Resend ​

  • timeout
  • multiple not ACKed