OSI Model

Data Package

Low-Level Layers

  • Physical.

    • Bit encoding.

  • Data Link.

    • Bitstream encoding in frames with error and flow control.

  • Network.

    • How the packets are routed in a computer network.

Transport Layer

Support layer to most of the communication in distributed systems.

Main protocols:

  • TCP: connection-oriented, reliable, information flow-oriented (stream).

  • UDP: non-reliable communication.

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