In this section, we'll take a look at the basics of TCP/IP, how packets are built, and the resolution processes that are in place, such as DNS and ARP.
In networking, we have two models that we commonly use: OSI and TCP/IP. As shown in the following diagram, on the left side we have the OSI model and on the right side we have TCP/IP model, and I've tried to match them up so that you can see how the different layers of each model line up with each other:
When we use Wireshark, we're commonly concerned with layers 2 through 7 of the OSI model. And most commonly when you use Wireshark, it's probably because something that's often ...
