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SESK: Stuff Everyone Should Know · sesk.info/tech-tcp-ip-four-layers

Which sequence matches the Internet protocol suite from top to bottom?

Application, transport, internet, link is the four-layer sequence.

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  1. Presentation, session, network, physical
  2. Application, transport, internet, link ✔
  3. Application, network, session, hardware

Why: The TCP/IP architecture groups communication into four conceptual layers. Each layer offers services to the layer above and relies on the one below.

Huh, didn't know that: TCP belongs to the transport layer, while IP belongs to the internet layer.

The dad joke
Why do network layers cooperate? They stack up well together.
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References

Answer: Application, transport, internet, link. The TCP/IP architecture groups communication into four conceptual layers. Each layer offers services to the layer above and relies on the one below.

  1. RFC 1122: Requirements for Internet Hosts www.rfc-editor.org/rfc/rfc1122.html
    The protocol layers used in the Internet architecture are as follows
    Checked 2026-10-10.

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