Today in 1983, 43 years ago: The ARPANET officially changes to using TCP/IP, the Internet Protocol, effectively creating the Internet.
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[–] 8 points 10 months ago (4 children)

But TCP and IP are layers in the protocol (that are actually used.) some of the layers are then effectively bypassed as you go further up to application layer.

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  • [–] 1 point 10 months ago (3 children)

    The TCP/IP model is a separate model that only loosely maps on to layers of the OSI model. They're two separate ways of describing how the whole network stack should work, but only one is actually used in the real world.

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  • [–] 3 points 10 months ago (1 child)

    It maps to L4 and L3

    TCP/IP also doesn’t include the media layers L2 and L1 (like MAC and frames.)

    Maybe think of OSI as the spec and TCP/IP as the implementation of some portions of that spec.

    Like UDP would also be L4. So you would miss that too.

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