The 7 layers of the OSI model. The layers (from bottom to top) are: Physical, Data Link, Network, Transport, Session, Presentation, and Application. Foundry. It wasn’t always this way.

Could anyone help find authoritative online sources and /or otherwise articulate on why it makes sense to go from the “top down” in the OST 7 -- layer model, instead of “bottom up”, when ...

The OSI model is the basis for most of the modern digital communications. Let’s dive into the seven layers of the OSI model and answers the billion-dollar question: how to protect the transmitted data ...

Suppliers like to bandy around tags like 'Layer-7 switch'. And while you know this relates to the Open System Interconnection (OSI) network protocol reference model, it's easy to forget what each ...

The seven layers of the OSI model somewhat correspond with the four layers that make up the TCP/IP protocol. The TCP layer packages the data into packets.

Most IT users will be familiar by now with the idea of `the software-defined something or other’. Indeed, there vendors that already talked about software-defined everything, which really should cover ...

What does OSI model actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia. ... Layer 7 is the purpose of communicating in the first place.

According to the OSI Model, the session layer is where connections are established, managed, and torn down. For connection-oriented network protocols, understanding how the session layer works ...

As a matter of fact, when I started writing this post I titled it “Layer 4 of the OSI Model – understanding the application layer,” and then I had to go back and correct myself.