In this chapter, you learned about the UDP protocol and its connectionless abilities—the very small header that it has, all the different fields in the TCP header, and the options that are available in it.

We also looked at TCP, the connection-oriented protocol, and the guaranteed transmission of certain data. We looked at the header and learned about the fact that it has different flags and different options to expand upon its capabilities. We also learned about the graphing functionality in Wireshark, and the fact that you can add multiple layers and change the way the lines and bar charts work, in order to get the most useful graph out of it.

In Chapter 8, Application Protocol Analysis I, we will take a look at HTTP and FTP, and some of the common applications that you'll run across on a day-to-day basis.