A tutorial on the Open Systems Interconnection (OSI) networking reference model plus tips on how to memorize the seven layers.

1. In the OSI model, data flows down the transmit layers, over the physical link, and then up through the receive layers.

Of the seven layers of the OSI Model, layers 5 and 6, the session and presentation layers, are the two least relevant layers for network engineers. Disagree?

I like to think of the transport layer as the layer of the OSI Model that enables more interesting traffic. While we network engineers may love a lot of the simpler uses of the IP protocol and ...

What does OSI model actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

If you have anything to do with networked AV and you're not well-versed in the OSI model, we've got you covered. You will learn the fundamental ideas around getting data from host A to host B over a ...