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TCP

• TCP staat voor TransmissionControl Protocol
• TCP zit in de transportlaag (4de laag) van het praktijkmodel, naast UDP
• TCP is connection oriented -> feedback a.d.h.v. Session Management en ACKnowledgements
   

  TCP-header

  

   

  funkties

  1. session management
     • session setup (three way handshake)
     • session tear down
     • keep alive frames
  2. multiplexing a.d.h.v. portnumbers
     • client ephemeral port
     • server well known port -- https://nl.wikipedia.org/wiki/TCP-_en_UDP-poorten
  3. full duplex
  4. flow control (sliding window)
  5. segmenting (message segmenteren tot stukken die in de Data-Link-Laag passen)
  6. sequencing (segments get a number)
  7. acknowledgements
     • next sequence number other side
     • error correction (if no ACK after 5 seconds -> resend of entire transmission window)
  8. sliding window mechanism:
     • https://www.youtube.com/watch?v=zY3Sxvj8kZA
     • https://www.youtube.com/watch?v=lk27yiITOvU
  9. error detection (a.d.h.v. checksum)
      

https://networklessons.com/cisco/ccie-routing-switching-written/tcp-header