The Data Link Layer is one of my favorite layers of the OSI Model. Like a father who loves ALL of his children equally, but in different ways, I also love the other layers, but Layer 2 will always ...

On a shared medium, data link addresses are unique within the medium. In the enterprise, data link protocols provide functions such as finding a path and managing parallel paths.

The transmitted bits are divided into frames, most commonly Ethernet. Layers 1 and 2 are required for every type of communications. For more on this layer, see data link protocol.