My plan for this week was to go over and talk about IP headers and datagrams. However, while looking through some resources, I find a document that can explain it far better than I can. So instead of diving into the technical nitty-gritty of packets and headers, I'll let Burton Rosenberg of the University of Miami's Computer Science department handy article explain it.
With my original plans for this article taken care of, I instead thought that it would be a good idea to cover how to actually examine a packet and apply this information. It is one thing to know the theory, and another entirely to apply it. With that in mind, I decided to play around with Wireshark and throw together a little demonstration depicting the process.
|Packet Detail viewer|
|Packet Bytes viewer|