No matter how advanced our cybersecurity defenses become, it’s the human layer that makes decisions, mistakes and oversights.

A couple posts ago, we talked about Layer 1 of the OSI Model — the Physical Layer. Today, we’ll start our climb up the Model with a visit to Layer 2, the Data Link Layer. The Data Link Layer is one of ...

Thanks for your comments on my first EtherGeek post on understanding the OSI Model. I especially enjoyed learning new ways to remember the OSI Model; for example: Please Do Not Throw Stale Pizza Away.

First, and foremost, the OSI stack is just a theoretical reference model. There is no actual OSI software. It has been around since about 1980, and it is based upon recommendations from the ITU-T and ...

We recently advised that people in the business of planning, building and supporting computer networks should not lose sight of the mythical OSI Layer 8. We define Layer 8 as the human-to-human ...

A reference model is a virtual model which defines how communication should take place. It logically divides the processes which are required for the communication into layers. This concept is known ...