Layer 2: Data Link Layer

Protocols and Applications
This section is dedicated to layer 2 protocols and applications. It is a very important section
because it provides specific information on how the layer 2 protocols work. What better
way to be able to troubleshoot a problem than by understanding the intricacies of the protocol
in question?

This section covers the following layer 2 protocols:

Ethernet/IEEE 802.3

PPP

SDLC

Frame Relay

ISDN