In this chapter (which has 2 parts) you will learn the logical networking model and what changes from traditional networking. In the first part of it, we will learn VRFs, Application Profiles and EPGs with Bridge-Domains as well as how to use them to allow communication between Virtual and Physical End Points within the same EPG. In the second part, you will learn more about EPGs and contracts and we will provide an overview on L3 Out EPGs. We will learn how to communicate anything on ACI through 5 easy steps