All right.
I admit it.
I'm not going to have a ton to say on the physical layer, but we are going to be talking a lot about
data link, layer or layer two technologies in this important chapter.
This chapter is going to be really making sure you understand the ins and outs of network switches and
MAC addresses, for example.
You're also going to learn to build a sample network topology in a great network simulation tool that's
really going to help you to make sure you have a grasp on the subject.
So while in the previous chapter we did the cool stuff with Wireshark, we're going to be doing even
cooler stuff, if you can imagine it, in this section.
So I'm glad you are here.
Let's get started.