Within the field of networking, there are two models that network professionals often refer to during their troubleshooting. These models are known as the Open Systems Interconnection (OSI) reference model and the Transmission Control Protocol/Internet Protocol (TCP/IP) stack.
The following table outlines the layers of each model and displays the OSI model, Protocol Data Units (PDUs), and the TCP/IP protocol suite:
Often, the terms packets and frames will be used interchangeably, but there is a difference between them. Let's focus a bit more on the characteristics of a frame and its composition.
In this section, we are going to focus on the data link layer (layer 2) of the OSI model. The data link layer is responsible for moving data between the software applications on devices to the physical layer of a network. This is done by the NIC. Additionally...
