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 ...

In the enterprise, data link protocols provide functions such as finding a path and managing parallel paths. In LANs, the most common kind of learning is finding a path through a set of network ...

The 7 layers of the OSI model The layers (from bottom to top) are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Layer 3 – network: The network layer handles packet routing via logical addressing and switching functions. • Layer 2 – data link: Layer 2 operations package and unpack the data in frames.