TCP / IP (4)

• TCP / IP protocol stack

  • Application (telnet, NFS, SNMP)
  • Transport (TCP / UDP)
  • Network (IP)
  • Physical

• TCP (stream --> segment --> datagram --> frame)

  • reliable, connection-oriented, byte-stream protocol

• UDP (message--> packet --> datagram --> frame)

  • unreliable, connection-less datagram protocol

• IP - connection-less protocol: when the datagrams are sent, the network does not know that there is any connection between them

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