A tutorial on the Open Systems Interconnection (OSI) networking reference model plus tips on how to memorize the seven layers. The Open Systems Interconnect (OSI) model is a conceptual framework ...

The third layer of the OSI Model, the network layer, is where most network engineers focus their time and expertise. As Darragh commented in my post on the data link layer, Layer 2 is cool but ...

Getting started on designing a network ... of the OSI model and the TCP/IP stack, as shown below. Then, we’ll use it to study which aspects of security relate to each layer.

Typically, these devices are hubs, multistation access units (MAUs), or switches deployed in wiring closets on each floor of a building. Users’ network ... OSI model Layer 3 devices (such ...