this post was submitted on 22 Nov 2025
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Easier way is to remember that the ISO model is defunked and you should use the TCP/IP model.
IP is layer 3 and TCP is layer 4.
Please elaborate your nonsensical comment.
The IP suite is not nearly as neatly layered as OSI was and the OSI model doesn't neatly fit the IP suite since it wasn't actually designed for IP at all. In the IP suite layers 5 and 6 basically don't exist in the OSI sense, TCP handles things that are part of both layers 4 and 5 in the model despite being a single protocol, etc. The OSI model is often considered obselete as it just doesn't actually fit the IP world all that well but it's been around so long and does have uses in certain situations that it tends to stick around.